еще какие-то изменения

AndDietCokeProject/AndDietCokeBuisnessLogic/AndDietCokeBuisnessLogic.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <LangVersion>preview</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="EntityFramework" Version="6.5.1" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.4" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.4" />
+    <PackageReference Include="Npgsql" Version="9.0.3" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AndDietCokeProject\AndDietCokeContracts.csproj" />
+  </ItemGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="AndDietCokeTests" />
+		<InternalsVisibleTo Include="AndDietCokeWebApi" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+
+</Project>

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/BuyerBusinessLogicContract.cs

@@ -0,0 +1,76 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+internal class BuyerBusinessLogicContract(IBuyerStorageContract buyerStorageContract, ILogger logger) : IBuyerBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IBuyerStorageContract _buyerStorageContract = buyerStorageContract;
+
+    public List<BuyerDataModel> GetAllBuyers()
+    {
+        _logger.LogInformation("GetAllBuyers");
+        return _buyerStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public BuyerDataModel GetBuyerByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _buyerStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        if (Regex.IsMatch(data, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+        {
+            return _buyerStorageContract.GetElementByPhoneNumber(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _buyerStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertBuyer(BuyerDataModel buyerDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(buyerDataModel));
+        ArgumentNullException.ThrowIfNull(buyerDataModel);
+        buyerDataModel.Validate();
+        _buyerStorageContract.AddElement(buyerDataModel);
+    }
+
+    public void UpdateBuyer(BuyerDataModel buyerDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(buyerDataModel));
+        ArgumentNullException.ThrowIfNull(buyerDataModel);
+        buyerDataModel.Validate();
+        _buyerStorageContract.UpdElement(buyerDataModel);
+    }
+
+    public void DeleteBuyer(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _buyerStorageContract.DelElement(id);
+    }
+}
+

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/DishBusinessLogicContract.cs

@@ -0,0 +1,80 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+internal class DishBusinessLogicContract(IDishStorageContract dishStorageContract, ILogger logger) : IDishBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IDishStorageContract _dishStorageContract = dishStorageContract;
+    public List<DishDataModel> GetAllDishes(bool onlyActive)
+    {
+        _logger.LogInformation("GetAllDishes params: {onlyActive}", onlyActive);
+        return _dishStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+    public List<DishHistoryDataModel> GetDishHistoryByDish(string dishId)
+    {
+        _logger.LogInformation("GetDishHistoryByDish for {dishId}", dishId);
+        if (dishId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(dishId));
+        }
+        if (!dishId.IsGuid())
+        {
+            throw new ValidationException("The value in the field dishId is not a unique identifier.");
+        }
+        return _dishStorageContract.GetHistoryByDishId(dishId) ?? throw new NullListException();
+    }
+    public DishDataModel GetDishByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _dishStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _dishStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+    public void InsertDish(DishDataModel dishDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(dishDataModel));
+        ArgumentNullException.ThrowIfNull(dishDataModel);
+        dishDataModel.Validate();
+        _dishStorageContract.AddElement(dishDataModel);
+    }
+    public void UpdateDish(DishDataModel dishDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(dishDataModel));
+        ArgumentNullException.ThrowIfNull(dishDataModel);
+        dishDataModel.Validate();
+        _dishStorageContract.UpdElement(dishDataModel);
+    }
+    public void DeleteDish(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _dishStorageContract.DelElement(id);
+    }
+}
+

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/PostBusinessLogicContract.cs

@@ -0,0 +1,99 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+public class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+
+    public List<PostDataModel> GetAllPosts(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllPosts params: {onlyActive}", onlyActive);
+        return _postStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+
+    public List<PostDataModel> GetAllDataOfPost(string postId)
+    {
+        _logger.LogInformation("GetAllDataOfPost for {postId}", postId);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _postStorageContract.GetPostWithHistory(postId) ?? throw new NullListException();
+    }
+
+    public PostDataModel GetPostByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _postStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _postStorageContract.GetElementByName(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertPost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.AddElement(postDataModel);
+    }
+
+    public void UpdatePost(PostDataModel postDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.UpdElement(postDataModel);
+    }
+
+    public void DeletePost(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.DelElement(id);
+    }
+
+    public void RestorePost(string id)
+    {
+        _logger.LogInformation("Restore by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.ResElement(id);
+    }
+}

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -0,0 +1,71 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static AndDietCokeBuisnessLogic.Implementations.SalaryBusinessLogicContract;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,
+    ISaleStorageContract saleStorageContract, IPostStorageContract postStorageContract, IWorkerStorageContract workerStorageContract, ILogger logger) : ISalaryBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IPostStorageContract _postStorageContract = postStorageContract;
+    private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;
+
+    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _salaryStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId)
+    {
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, {workerId}", fromDate, toDate, workerId);
+        return _salaryStorageContract.GetList(fromDate, toDate, workerId) ?? throw new NullListException();
+    }
+
+    public void CalculateSalaryByMounth(DateTime date)
+    {
+        _logger.LogInformation("CalculateSalaryByMounth: {date}", date);
+        var startDate = new DateTime(date.Year, date.Month, 1);
+        var finishDate = new DateTime(date.Year, date.Month, DateTime.DaysInMonth(date.Year, date.Month));
+        var workers = _workerStorageContract.GetList() ?? throw new NullListException();
+        foreach (var worker in workers)
+        {
+            var sales = _saleStorageContract.GetList(startDate, finishDate, workerId: worker.Id)?.Sum(x => x.Sum) ??
+                throw new NullListException();
+            var post = _postStorageContract.GetElementById(worker.PostId) ??
+                throw new NullListException();
+            var salary = post.Salary + sales * 0.1;
+            _logger.LogDebug("The employee {workerId} was paid a salary of {salary}", worker.Id, salary);
+            _salaryStorageContract.AddElement(new SalaryDataModel(worker.Id, finishDate, salary));
+        }
+    }
+
+}

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -0,0 +1,120 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract, ILogger logger) : ISaleBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+
+    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _saleStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {workerId}, {fromDate}, {toDate}", workerId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, workerId: workerId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByBuyerByPeriod(string buyerId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {buyerId}, {fromDate}, {toDate}", buyerId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (buyerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(buyerId));
+        }
+        if (!buyerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field buyerId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, buyerId: buyerId) ?? throw new NullListException();
+    }
+
+    public List<SaleDataModel> GetAllSalesByDishByPeriod(string dishId, DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {dishId}, {fromDate}, {toDate}", dishId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (dishId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(dishId));
+        }
+        if (!dishId.IsGuid())
+        {
+            throw new ValidationException("The value in the field dishId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, dishId: dishId) ?? throw new NullListException();
+    }
+
+    public SaleDataModel GetSaleByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        return _saleStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertSale(SaleDataModel saleDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(saleDataModel));
+        ArgumentNullException.ThrowIfNull(saleDataModel);
+        saleDataModel.Validate();
+        _saleStorageContract.AddElement(saleDataModel);
+    }
+
+    public void CancelSale(string id)
+    {
+        _logger.LogInformation("Cancel by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _saleStorageContract.DelElement(id);
+    }
+}

AndDietCokeProject/AndDietCokeBuisnessLogic/Implementations/WorkerBusinessLogicContract.cs

@@ -0,0 +1,104 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace AndDietCokeBuisnessLogic.Implementations;
+
+internal class WorkerBusinessLogicContract(IWorkerStorageContract workerStorageContract, ILogger logger) : IWorkerBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;
+
+    public List<WorkerDataModel> GetAllWorkers(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}", onlyActive);
+        return _workerStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByPost(string postId, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {postId}, {onlyActive},", postId, onlyActive);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _workerStorageContract.GetList(onlyActive, postId) ?? throw new NullListException();
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromBirthDate: fromDate, toBirthDate: toDate) ?? throw new NullListException();
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}, {fromDate}, {toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromEmploymentDate: fromDate, toEmploymentDate: toDate) ?? throw new NullListException();
+    }
+
+    public WorkerDataModel GetWorkerByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _workerStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+        }
+        return _workerStorageContract.GetElementByFIO(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertWorker(WorkerDataModel workerDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.AddElement(workerDataModel);
+    }
+
+    public void UpdateWorker(WorkerDataModel workerDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.UpdElement(workerDataModel);
+    }
+
+    public void DeleteWorker(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _workerStorageContract.DelElement(id);
+    }
+}

AndDietCokeProject/AndDietCokeDatabase/AndDietCokeDatabase.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <LangVersion>preview</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="EntityFramework" Version="6.5.1" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.4" />
+    <PackageReference Include="Npgsql" Version="9.0.3" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AndDietCokeProject\AndDietCokeContracts.csproj" />
+  </ItemGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="AndDietCokeTests" />
+		<InternalsVisibleTo Include="AndDietCokeWebApi" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+
+</Project>

AndDietCokeProject/AndDietCokeDatabase/AndDietCokeDbContext.cs

@@ -0,0 +1,58 @@
+using AndDietCokeDatabase.Models;
+using AndDietCokeContracts.Infrastrusture;
+using Microsoft.EntityFrameworkCore;
+
+namespace AndDietCokeDatabase;
+
+public class AndDietCokeDbContext(IConfigurationDatabase configurationDatabase) : DbContext
+{
+    private readonly IConfigurationDatabase? _configurationDatabase = configurationDatabase;
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseNpgsql(_configurationDatabase?.ConnectionString, o => o.SetPostgresVersion(12, 2));
+        base.OnConfiguring(optionsBuilder);
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Buyer>()
+            .HasIndex(x => x.PhoneNumber).IsUnique();
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostName, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostId, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Dish>()
+            .HasIndex(x => new { x.DishName, x.IsDeleted })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Dish.IsDeleted)}\" = FALSE");
+
+        modelBuilder.Entity<OrderDish>()
+            .HasKey(x => new { x.OrderId, x.DishId });
+    }
+
+    public DbSet<Buyer> Buyers { get; set; }
+
+    public DbSet<Post> Posts { get; set; }
+
+    public DbSet<Dish> Dishes { get; set; }
+
+    public DbSet<DishHistory> DishHistories { get; set; }
+
+    public DbSet<Salary> Salaries { get; set; }
+
+    public DbSet<Sale> Sales { get; set; }
+
+    public DbSet<OrderDish> OrderDishes { get; set; }
+
+    public DbSet<Worker> Workers { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/BuyerStorageContract.cs

@@ -0,0 +1,153 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class BuyerStorageContract : IBuyerStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public BuyerStorageContract(AndDietCokeDbContext andDietCokeDbContext)
+    {
+        _dbContext = andDietCokeDbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(AndDietCokeDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<BuyerDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Buyers.Select(x => _mapper.Map<BuyerDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public BuyerDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<BuyerDataModel>(GetBuyerById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public BuyerDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<BuyerDataModel>(_dbContext.Buyers.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public BuyerDataModel? GetElementByPhoneNumber(string phoneNumber)
+    {
+        try
+        {
+            return _mapper.Map<BuyerDataModel>(_dbContext.Buyers.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(BuyerDataModel buyerDataModel)
+    {
+        try
+        {
+            _dbContext.Buyers.Add(_mapper.Map<Buyer>(buyerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", buyerDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Buyers_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", buyerDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(BuyerDataModel buyerDataModel)
+    {
+        try
+        {
+            var element = GetBuyerById(buyerDataModel.Id) ?? throw new ElementNotFoundException(buyerDataModel.Id);
+            _dbContext.Buyers.Update(_mapper.Map(buyerDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Buyers_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", buyerDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetBuyerById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Buyers.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Buyer? GetBuyerById(string id) => _dbContext.Buyers.FirstOrDefault(x => x.Id == id);
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/DishStorageContract.cs

@@ -0,0 +1,176 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class DishStorageContract : IDishStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public DishStorageContract(AndDietCokeDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Dish, DishDataModel>();
+            cfg.CreateMap<DishDataModel, Dish>()
+                .ForMember(x => x.IsDeleted, x => x.MapFrom(src => false));
+            cfg.CreateMap<DishHistory, DishHistoryDataModel>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<DishDataModel> GetList(bool onlyActive = true)
+    {
+        try
+        {
+            var query = _dbContext.Dishes.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            return [.. query.Select(x => _mapper.Map<DishDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<DishHistoryDataModel> GetHistoryByDishId(string dishId)
+    {
+        try
+        {
+            return [.. _dbContext.DishHistories.Where(x => x.DishId == dishId).OrderByDescending(x => x.ChangeDate).Select(x => _mapper.Map<DishHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public DishDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<DishDataModel>(GetDishById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public DishDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<DishDataModel>(_dbContext.Dishes.FirstOrDefault(x => x.DishName == name && !x.IsDeleted));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(DishDataModel dishDataModel)
+    {
+        try
+        {
+            _dbContext.Dishes.Add(_mapper.Map<Dish>(dishDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", dishDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Dishes_DishName_IsDeleted" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("DishName", dishDataModel.DishName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(DishDataModel dishDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetDishById(dishDataModel.Id) ?? throw new ElementNotFoundException(dishDataModel.Id);
+                if (element.Price != dishDataModel.Price)
+                {
+                    _dbContext.DishHistories.Add(new DishHistory() { DishId = element.Id, OldPrice = element.Price });
+                    _dbContext.SaveChanges();
+                }
+                _dbContext.Dishes.Update(_mapper.Map(dishDataModel, element));
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Dishes_DishName_IsDeleted" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("DishName", dishDataModel.DishName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetDishById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Dish? GetDishById(string id) => _dbContext.Dishes.FirstOrDefault(x => x.Id == id && !x.IsDeleted);
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/PostStorageContract.cs

@@ -0,0 +1,195 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class PostStorageContract : IPostStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(AndDietCokeDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, opt => opt.MapFrom(src => src.PostId));
+            cfg.CreateMap<PostDataModel, Post>()
+                .ForMember(x => x.Id, x => x.Ignore())
+                .ForMember(x => x.PostId, x => x.MapFrom(src => src.Id))
+                .ForMember(x => x.IsActual, x => x.MapFrom(src => true))
+                .ForMember(x => x.ChangeDate, x => x.MapFrom(src => DateTime.UtcNow));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<PostDataModel> GetList(bool onlyActual = true)
+    {
+        try
+        {
+            var query = _dbContext.Posts.AsQueryable();
+            if (onlyActual)
+            {
+                query = query.Where(x => x.IsActual);
+            }
+            return [.. query.Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<PostDataModel> GetPostWithHistory(string postId)
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Where(x => x.PostId == postId).Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostName == name && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            _dbContext.Posts.Add(_mapper.Map<Post>(postDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostId_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", postDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetPostById(postDataModel.Id) ?? throw new ElementNotFoundException(postDataModel.Id);
+                if (!element.IsActual)
+                {
+                    throw new ElementDeletedException(postDataModel.Id);
+                }
+                element.IsActual = false;
+                _dbContext.SaveChanges();
+                var newElement = _mapper.Map<Post>(postDataModel);
+                _dbContext.Posts.Add(newElement);
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            if (!element.IsActual)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsActual = false;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            element.IsActual = true;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Post? GetPostById(string id) => _dbContext.Posts.Where(x => x.PostId == id).OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,62 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(AndDietCokeDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.WorkerSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? workerId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate);
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            return [.. query.Select(x => _mapper.Map<SalaryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SalaryDataModel salaryDataModel)
+    {
+        try
+        {
+            _dbContext.Salaries.Add(_mapper.Map<Salary>(salaryDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/SaleStorageContract.cs

@@ -0,0 +1,145 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class SaleStorageContract : ISaleStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SaleStorageContract(AndDietCokeDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<OrderDish, OrderDishDataModel>()
+               .ConstructUsing(od => new OrderDishDataModel(
+                   od.OrderId,
+                   od.DishId,
+                   od.Count,
+                   od.Price
+               ));
+
+            cfg.CreateMap<Sale, SaleDataModel>()
+               .ConstructUsing(src => new SaleDataModel(
+                   src.Id,
+                   src.WorkerId,
+                   src.BuyerId,
+                   src.IsConstantClient,
+                   src.IsCancel,
+                   src.OrderDishes != null
+                       ? src.OrderDishes.Select(od => new OrderDishDataModel(
+                           od.OrderId, 
+                           od.DishId,
+                           od.Count,
+                           od.Price
+                       )).ToList()
+                       : new List<OrderDishDataModel>()
+               ));
+
+            cfg.CreateMap<OrderDishDataModel, OrderDish>()
+               .ForMember(dest => dest.OrderId, opt => opt.MapFrom(src => src.OrderId))
+               .ForMember(dest => dest.DishId, opt => opt.MapFrom(src => src.DishId))
+               .ForMember(dest => dest.Count, opt => opt.MapFrom(src => src.Count));
+
+            cfg.CreateMap<SaleDataModel, Sale>()
+               .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+               .ForMember(x => x.OrderDishes, x => x.MapFrom(src => src.Dishes));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? workerId = null, string? buyerId = null, string? dishId = null)
+    {
+        try
+        {
+            var query = _dbContext.Sales.Include(x => x.OrderDishes).AsQueryable();
+            if (startDate is not null && endDate is not null)
+            {
+                query = query.Where(x => x.SaleDate >= startDate && x.SaleDate < endDate);
+            }
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            if (buyerId is not null)
+            {
+                query = query.Where(x => x.BuyerId == buyerId);
+            }
+            if (dishId is not null)
+            {
+                query = query.Where(x => x.OrderDishes!.Any(y => y.DishId == dishId));
+            }
+            return [.. query.Select(x => _mapper.Map<SaleDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SaleDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SaleDataModel>(GetSaleById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SaleDataModel saleDataModel)
+    {
+        try
+        {
+            _dbContext.Sales.Add(_mapper.Map<Sale>(saleDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetSaleById(id) ?? throw new ElementNotFoundException(id);
+            if (element.IsCancel)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsCancel = true;
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Sale? GetSaleById(string id) => _dbContext.Sales.FirstOrDefault(x => x.Id == id);
+}

AndDietCokeProject/AndDietCokeDatabase/Implementations/WorkerStorageContract.cs

@@ -0,0 +1,145 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AutoMapper;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Implementations;
+
+internal class WorkerStorageContract : IWorkerStorageContract
+{
+    private readonly AndDietCokeDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public WorkerStorageContract(AndDietCokeDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(AndDietCokeDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<WorkerDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Workers.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (postId is not null)
+            {
+                query = query.Where(x => x.PostId == postId);
+            }
+            if (fromBirthDate is not null && toBirthDate is not null)
+            {
+                query = query.Where(x => x.BirthDate >= fromBirthDate && x.BirthDate <= toBirthDate);
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not null)
+            {
+                query = query.Where(x => x.EmploymentDate >= fromEmploymentDate && x.EmploymentDate <= toEmploymentDate);
+            }
+            return [.. query.Select(x => _mapper.Map<WorkerDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public WorkerDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<WorkerDataModel>(GetWorkerById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public WorkerDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<WorkerDataModel>(_dbContext.Workers.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            _dbContext.Workers.Add(_mapper.Map<Worker>(workerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", workerDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            var element = GetWorkerById(workerDataModel.Id) ?? throw new ElementNotFoundException(workerDataModel.Id);
+            _dbContext.Workers.Update(_mapper.Map(workerDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetWorkerById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Worker? GetWorkerById(string id) => _dbContext.Workers.FirstOrDefault(x => x.Id == id && !x.IsDeleted);
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Buyer.cs

@@ -0,0 +1,25 @@
+using AndDietCokeContracts.DataModels;
+using AutoMapper;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+[AutoMap(typeof(BuyerDataModel), ReverseMap = true)]
+public class Buyer
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+
+    [ForeignKey("BuyerId")]
+    public List<Sale>? Sales { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Dish.cs

@@ -0,0 +1,26 @@
+using AndDietCokeContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+namespace AndDietCokeDatabase.Models;
+
+public class Dish
+{
+    public required string Id { get; set; }
+
+    public required string DishName { get; set; }
+
+    public DishType DishType { get; set; }
+
+    public double Price { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    [ForeignKey("DishId")]
+    public List<DishHistory>? DishHistories { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/DishHistory.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+public class DishHistory
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string DishId { get; set; }
+
+    public double OldPrice { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+
+    public Dish? Dish { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/OrderDish.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+public class OrderDish
+{
+    public required string OrderId { get; set; }
+
+    public required string DishId { get; set; }
+
+    public int Count { get; set; }
+    public double Price { get; set; }
+
+    public Sale? Sale { get; set; }
+
+    public Dish? Dish { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Post.cs

@@ -0,0 +1,25 @@
+using AndDietCokeContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+public class Post
+{
+    public required string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string PostId { get; set; }
+
+    public required string PostName { get; set; }
+
+    public PostType PostType { get; set; }
+
+    public double Salary { get; set; }
+
+    public bool IsActual { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Salary.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+public class Salary
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string WorkerId { get; set; }
+
+    public DateTime SalaryDate { get; set; }
+
+    public double WorkerSalary { get; set; }
+
+    public Worker? Worker { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Sale.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+public class Sale
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string WorkerId { get; set; }
+
+    public string? BuyerId { get; set; }
+
+    public DateTime SaleDate { get; set; }
+
+    public double Sum { get; set; }
+
+    public bool IsConstantClient { get; set; }
+
+    public bool IsCancel { get; set; }
+
+    public Worker? Worker { get; set; }
+
+    public Buyer? Buyer { get; set; }
+
+    [ForeignKey("SaleId")]
+    public List<OrderDish>? OrderDishes { get; set; }
+}

AndDietCokeProject/AndDietCokeDatabase/Models/Worker.cs

@@ -0,0 +1,41 @@
+using AndDietCokeContracts.DataModels;
+using AutoMapper;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeDatabase.Models;
+
+[AutoMap(typeof(WorkerDataModel), ReverseMap = true)]
+public class Worker
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+   
+    [NotMapped]
+    public Post? Post { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    [ForeignKey("WorkerId")]
+    public List<Salary>? Salaries { get; set; }
+
+    [ForeignKey("WorkerId")]
+    public List<Sale>? Sales { get; set; }
+
+    public Worker AddPost(Post? post)
+    {
+        Post = post;
+        return this;
+    }
+}

AndDietCokeProject/AndDietCokeProject.sln

@@ -5,7 +5,16 @@ VisualStudioVersion = 17.7.34024.191
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AndDietCokeContracts", "AndDietCokeProject\AndDietCokeContracts.csproj", "{624595D1-D7AA-4448-AA30-4D5AA21AE6D6}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeTests", "AndDietCokeTests\AndDietCokeTests.csproj", "{EABA3AD5-7690-448A-BEE6-010499DD8790}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AndDietCokeTests", "AndDietCokeTests\AndDietCokeTests.csproj", "{EABA3AD5-7690-448A-BEE6-010499DD8790}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AndDietCokeBuisnessLogic", "AndDietCokeBuisnessLogic\AndDietCokeBuisnessLogic.csproj", "{3C1C0E8F-5CB4-4E93-B20C-86FF4B248ECF}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AndDietCokeDatabase", "AndDietCokeDatabase\AndDietCokeDatabase.csproj", "{4AFC4FDC-F8CA-4CC5-84E2-162ADA98EDD4}"
+	ProjectSection(ProjectDependencies) = postProject
+		{624595D1-D7AA-4448-AA30-4D5AA21AE6D6} = {624595D1-D7AA-4448-AA30-4D5AA21AE6D6}
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeWebApi", "AndDietCokeWebApi\AndDietCokeWebApi.csproj", "{59659F17-4A33-47B1-951B-A329A547B3BF}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +30,18 @@ Global
 		{EABA3AD5-7690-448A-BEE6-010499DD8790}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EABA3AD5-7690-448A-BEE6-010499DD8790}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EABA3AD5-7690-448A-BEE6-010499DD8790}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3C1C0E8F-5CB4-4E93-B20C-86FF4B248ECF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3C1C0E8F-5CB4-4E93-B20C-86FF4B248ECF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3C1C0E8F-5CB4-4E93-B20C-86FF4B248ECF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3C1C0E8F-5CB4-4E93-B20C-86FF4B248ECF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4AFC4FDC-F8CA-4CC5-84E2-162ADA98EDD4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4AFC4FDC-F8CA-4CC5-84E2-162ADA98EDD4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4AFC4FDC-F8CA-4CC5-84E2-162ADA98EDD4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4AFC4FDC-F8CA-4CC5-84E2-162ADA98EDD4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{59659F17-4A33-47B1-951B-A329A547B3BF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{59659F17-4A33-47B1-951B-A329A547B3BF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{59659F17-4A33-47B1-951B-A329A547B3BF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{59659F17-4A33-47B1-951B-A329A547B3BF}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

AndDietCokeProject/AndDietCokeProject/AdapterContracts/IBuyerAdapter.cs

@@ -0,0 +1,22 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using AndDietCokeContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface IBuyerAdapter
+{
+    BuyerOperationResponse GetList();
+
+    BuyerOperationResponse GetElement(string data);
+
+    BuyerOperationResponse RegisterBuyer(BuyerBindingModel buyerModel);
+
+    BuyerOperationResponse ChangeBuyerInfo(BuyerBindingModel buyerModel);
+
+    BuyerOperationResponse RemoveBuyer(string id);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/IDishAdapter.cs

@@ -0,0 +1,24 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using AndDietCokeContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface IDishAdapter
+{
+    DishOperationResponse GetList(bool includeDeleted);
+
+    DishOperationResponse GetHistory(string id);
+
+    DishOperationResponse GetElement(string data);
+
+    DishOperationResponse RegisterDish(DishBindingModel dishModel);
+
+    DishOperationResponse ChangeDishInfo(DishBindingModel dishModel);
+
+    DishOperationResponse RemoveDish(string id);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/IPostAdapter.cs

@@ -0,0 +1,26 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using AndDietCokeContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface IPostAdapter
+{
+    PostOperationResponse GetList();
+
+    PostOperationResponse GetHistory(string id);
+
+    PostOperationResponse GetElement(string data);
+
+    PostOperationResponse RegisterPost(PostBindingModel postModel);
+
+    PostOperationResponse ChangePostInfo(PostBindingModel postModel);
+
+    PostOperationResponse RemovePost(string id);
+
+    PostOperationResponse RestorePost(string id);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/ISalaryAdapter.cs

@@ -0,0 +1,15 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface ISalaryAdapter
+{
+    SalaryOperationResponse GetListByPeriod(DateTime fromDate, DateTime toDate);
+    SalaryOperationResponse GetListByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId);
+    SalaryOperationResponse CalculateSalary(DateTime date);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/ISaleAdapter.cs

@@ -0,0 +1,26 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using AndDietCokeContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface ISaleAdapter
+{
+    SaleOperationResponse GetList(DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetWorkerList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetBuyerList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetDishList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetElement(string id);
+
+    SaleOperationResponse MakeSale(SaleBindingModel saleModel);
+
+    SaleOperationResponse CancelSale(string id);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/IWorkerAdapter.cs

@@ -0,0 +1,28 @@
+using AndDietCokeContracts.AdapterContracts.OperationResponses;
+using AndDietCokeContracts.BindingModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts;
+
+public interface IWorkerAdapter
+{
+    WorkerOperationResponse GetList(bool includeDeleted);
+
+    WorkerOperationResponse GetPostList(string id, bool includeDeleted);
+
+    WorkerOperationResponse GetListByBirthDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    WorkerOperationResponse GetListByEmploymentDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    WorkerOperationResponse GetElement(string data);
+
+    WorkerOperationResponse RegisterWorker(WorkerBindingModel workerModel);
+
+    WorkerOperationResponse ChangeWorkerInfo(WorkerBindingModel workerModel);
+
+    WorkerOperationResponse RemoveWorker(string id);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/BuyerOperationResponse.cs

@@ -0,0 +1,24 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class BuyerOperationResponse : OperationResponse
+{
+    public static BuyerOperationResponse OK(List<BuyerViewModel> data) => OK<BuyerOperationResponse, List<BuyerViewModel>>(data);
+
+    public static BuyerOperationResponse OK(BuyerViewModel data) => OK<BuyerOperationResponse, BuyerViewModel>(data);
+
+    public static BuyerOperationResponse NoContent() => NoContent<BuyerOperationResponse>();
+
+    public static BuyerOperationResponse BadRequest(string message) => BadRequest<BuyerOperationResponse>(message);
+
+    public static BuyerOperationResponse NotFound(string message) => NotFound<BuyerOperationResponse>(message);
+
+    public static BuyerOperationResponse InternalServerError(string message) => InternalServerError<BuyerOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/DishOperationResponse.cs

@@ -0,0 +1,26 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class DishOperationResponse : OperationResponse
+{
+    public static DishOperationResponse OK(List<DishViewModel> data) => OK<DishOperationResponse, List<DishViewModel>>(data);
+
+    public static DishOperationResponse OK(List<DishHistoryViewModel> data) => OK<DishOperationResponse, List<DishHistoryViewModel>>(data);
+
+    public static DishOperationResponse OK(DishViewModel data) => OK<DishOperationResponse, DishViewModel>(data);
+
+    public static DishOperationResponse NoContent() => NoContent<DishOperationResponse>();
+
+    public static DishOperationResponse NotFound(string message) => NotFound<DishOperationResponse>(message);
+
+    public static DishOperationResponse BadRequest(string message) => BadRequest<DishOperationResponse>(message);
+
+    public static DishOperationResponse InternalServerError(string message) => InternalServerError<DishOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/PostOperationResponse.cs

@@ -0,0 +1,24 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class PostOperationResponse : OperationResponse
+{
+    public static PostOperationResponse OK(List<PostViewModel> data) => OK<PostOperationResponse, List<PostViewModel>>(data);
+
+    public static PostOperationResponse OK(PostViewModel data) => OK<PostOperationResponse, PostViewModel>(data);
+
+    public static PostOperationResponse NoContent() => NoContent<PostOperationResponse>();
+
+    public static PostOperationResponse NotFound(string message) => NotFound<PostOperationResponse>(message);
+
+    public static PostOperationResponse BadRequest(string message) => BadRequest<PostOperationResponse>(message);
+
+    public static PostOperationResponse InternalServerError(string message) => InternalServerError<PostOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/SalaryOperationResponse.cs

@@ -0,0 +1,22 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class SalaryOperationResponse : OperationResponse
+{
+    public static SalaryOperationResponse OK(List<SalaryViewModel> data) => OK<SalaryOperationResponse, List<SalaryViewModel>>(data);
+
+    public static SalaryOperationResponse NoContent() => NoContent<SalaryOperationResponse>();
+
+    public static SalaryOperationResponse NotFound(string message) => NotFound<SalaryOperationResponse>(message);
+
+    public static SalaryOperationResponse BadRequest(string message) => BadRequest<SalaryOperationResponse>(message);
+
+    public static SalaryOperationResponse InternalServerError(string message) => InternalServerError<SalaryOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/SaleOperationResponse.cs

@@ -0,0 +1,24 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class SaleOperationResponse : OperationResponse
+{
+    public static SaleOperationResponse OK(List<SaleViewModel> data) => OK<SaleOperationResponse, List<SaleViewModel>>(data);
+
+    public static SaleOperationResponse OK(SaleViewModel data) => OK<SaleOperationResponse, SaleViewModel>(data);
+
+    public static SaleOperationResponse NoContent() => NoContent<SaleOperationResponse>();
+
+    public static SaleOperationResponse NotFound(string message) => NotFound<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse BadRequest(string message) => BadRequest<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse InternalServerError(string message) => InternalServerError<SaleOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AdapterContracts/OperationResponses/WorkerOperationResponse.cs

@@ -0,0 +1,24 @@
+using AndDietCokeContracts.Infrastrusture;
+using AndDietCokeContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.AdapterContracts.OperationResponses;
+
+public class WorkerOperationResponse : OperationResponse
+{
+    public static WorkerOperationResponse OK(List<WorkerViewModel> data) => OK<WorkerOperationResponse, List<WorkerViewModel>>(data);
+
+    public static WorkerOperationResponse OK(WorkerViewModel data) => OK<WorkerOperationResponse, WorkerViewModel>(data);
+
+    public static WorkerOperationResponse NoContent() => NoContent<WorkerOperationResponse>();
+
+    public static WorkerOperationResponse NotFound(string message) => NotFound<WorkerOperationResponse>(message);
+
+    public static WorkerOperationResponse BadRequest(string message) => BadRequest<WorkerOperationResponse>(message);
+
+    public static WorkerOperationResponse InternalServerError(string message) => InternalServerError<WorkerOperationResponse>(message);
+}

AndDietCokeProject/AndDietCokeProject/AndDietCokeContracts.csproj

@@ -1,10 +1,20 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <LangVersion>preview</LangVersion>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="EntityFramework" Version="6.5.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.4" />
+    <PackageReference Include="Npgsql" Version="9.0.3" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+  </ItemGroup>
+
 </Project>

AndDietCokeProject/AndDietCokeProject/BindingModels/BuyerBindingModel.cs

@@ -0,0 +1,10 @@
+namespace AndDietCokeContracts.BindingModels;
+
+public class BuyerBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? PhoneNumber { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BindingModels/DishBindingModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BindingModels;
+
+public class DishBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? DishName { get; set; }
+
+    public string? DishType { get; set; }
+
+    public double Price { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BindingModels/OrderDishBindingModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BindingModels;
+
+public class OrderDishBindingModel
+{
+    public string? SaleId { get; set; }
+
+    public string? DishId { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BindingModels/PostBindingModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BindingModels;
+
+public class PostBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? PostId => Id;
+
+    public string? PostName { get; set; }
+
+    public string? PostType { get; set; }
+
+    public double Salary { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BindingModels/SaleBindingModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BindingModels;
+
+public class SaleBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? WorkerId { get; set; }
+
+    public string? BuyerId { get; set; }
+
+    public int DiscountType { get; set; }
+
+    public List<OrderDishBindingModel>? Dishes { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BindingModels/WorkerBindingModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BindingModels;
+
+public class WorkerBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/IBuyerBusinessLogicContract.cs

@@ -0,0 +1,18 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface IBuyerBusinessLogicContract
+{
+    List<BuyerDataModel> GetAllBuyers();
+    BuyerDataModel GetBuyerByData(string data);
+    void InsertBuyer(BuyerDataModel buyerDataModel);
+    void UpdateBuyer(BuyerDataModel buyerDataModel);
+    void DeleteBuyer(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/IDishBusinessLogicContract.cs

@@ -0,0 +1,19 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface IDishBusinessLogicContract
+{
+    List<DishDataModel> GetAllDishes(bool onlyActive = true);
+    List<DishHistoryDataModel> GetDishHistoryByDish(string dishId);
+    DishDataModel GetDishByData(string data);
+    void InsertDish(DishDataModel dishDataModel);
+    void UpdateDish(DishDataModel dishDataModel);
+    void DeleteDish(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/IPostBusinessLogicContract.cs

@@ -0,0 +1,20 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface IPostBusinessLogicContract
+{
+    List<PostDataModel> GetAllPosts(bool onlyActive);
+    List<PostDataModel> GetAllDataOfPost(string postId);
+    PostDataModel GetPostByData(string data);
+    void InsertPost(PostDataModel postDataModel);
+    void UpdatePost(PostDataModel postDataModel);
+    void DeletePost(string id);
+    void RestorePost(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/ISalaryBusinessLogicContract.cs

@@ -0,0 +1,15 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface ISalaryBusinessLogicContract
+{
+    List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate);
+    List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId);
+    void CalculateSalaryByMounth(DateTime date);
+}

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/ISaleBusinessLogicContract.cs

@@ -0,0 +1,20 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface ISaleBusinessLogicContract
+{
+    List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate);
+    List<SaleDataModel> GetAllSalesByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate);
+    List<SaleDataModel> GetAllSalesByBuyerByPeriod(string buyerId, DateTime fromDate, DateTime toDate);
+    List<SaleDataModel> GetAllSalesByDishByPeriod(string dishId, DateTime fromDate, DateTime toDate);
+    SaleDataModel GetSaleByData(string data);
+    void InsertSale(SaleDataModel saleDataModel);
+    void CancelSale(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/BisnessLogicsContracts/IWorkerBusinessLogicContract.cs

@@ -0,0 +1,20 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BisnessLogicsContracts;
+
+public interface IWorkerBusinessLogicContract
+{
+    List<WorkerDataModel> GetAllWorkers(bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByPost(string postId, bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+    List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+    WorkerDataModel GetWorkerByData(string data);
+    void InsertWorker(WorkerDataModel workerDataModel);
+    void UpdateWorker(WorkerDataModel workerDataModel);
+    void DeleteWorker(string id);
+}

AndDietCokeProject/AndDietCokeProject/DataModels/OrderDishDataModel.cs

@@ -3,17 +3,27 @@ using AndDietCokeContracts.Extensions;
 using AndDietCokeContracts.Infrastrusture;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace AndDietCokeContracts.DataModels;
 
-public class OrderDishDataModel(string orderId, string dishId, int count) : IValidation
+public class OrderDishDataModel(string orderId, string dishId, int count, double price) : IValidation
 {
+    private readonly DishDataModel? _dish;
     public string OrderId { get; private set; } = orderId;
     public string DishId { get; private set; } = dishId;
     public int Count { get; private set; } = count;
+    public double Price { get; private set; } = price;
+    public string DishName => _dish?.DishName ?? string.Empty;
+
+    public OrderDishDataModel(string saleId, string dishId, int count, double price, DishDataModel dish) : this(saleId, dishId, count, price)
+    {
+        _dish = dish;
+    }
+
     public void Validate()
     {
         if (OrderId.IsEmpty())

AndDietCokeProject/AndDietCokeProject/DataModels/PostDataModel.cs

@@ -11,11 +11,10 @@ using System.Xml;
 
 namespace AndDietCokeContracts.DataModels;
 
-public class PostDataModel(string id, string postId, string postName, PostType
+public class PostDataModel(string id, string postName, PostType
 postType, double salary, bool isActual, DateTime changeDate) : IValidation
 {
     public string Id { get; private set; } = id;
-    public string PostId { get; private set; } = postId;
     public string PostName { get; private set; } = postName;
     public PostType PostType { get; private set; } = postType;
     public double Salary { get; private set; } = salary;
@@ -27,10 +26,6 @@ postType, double salary, bool isActual, DateTime changeDate) : IValidation
             throw new ValidationException("Field Id is empty");
         if (!Id.IsGuid())
             throw new ValidationException("The value in the field Id is not a unique identifier");
-        if (PostId.IsEmpty())
-            throw new ValidationException("Field PostId is empty");
-        if (!PostId.IsGuid())
-            throw new ValidationException("The value in the field PostId is not a unique identifier");
         if (PostName.IsEmpty())
             throw new ValidationException("Field PostName is empty");
         if (PostType == PostType.None)

AndDietCokeProject/AndDietCokeProject/DataModels/SaleDataModel.cs

@@ -11,16 +11,44 @@ using System.Xml;
 
 namespace AndDietCokeContracts.DataModels;
 
-public class SaleDataModel(string id, string workerId, string? buyerId, double sum, bool isConstantClient, bool isCancel, List<OrderDishDataModel> dishes) : IValidation
+public class SaleDataModel : IValidation
 {
-    public string Id { get; private set; } = id;
-    public string WorkerId { get; private set; } = workerId;
-    public string? BuyerId { get; private set; } = buyerId;
-    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
-    public double Sum { get; private set; } = sum;
-    public bool IsConstantClient { get; private set; } = isConstantClient;
-    public bool IsCancel { get; private set; } = isCancel;
-    public List<OrderDishDataModel> Dishes { get; private set; } = dishes;
+    private readonly BuyerDataModel? _buyer;
+
+    private readonly WorkerDataModel? _worker;
+
+    public string Id { get; private set; }
+    public string WorkerId { get; private set; }
+    public string? BuyerId { get; private set; }
+    public DateTime SaleDate { get; private set; }
+    public double Sum { get; private set; } 
+    public bool IsConstantClient { get; private set; }
+    public bool IsCancel { get; private set; } 
+    public List<OrderDishDataModel> Dishes { get; private set; }
+    public string BuyerFIO => _buyer?.FIO ?? string.Empty;
+    public string WorkerFIO => _worker?.FIO ?? string.Empty;
+
+    public SaleDataModel(string id, string workerId, string? buyerId, bool isConstantClient, bool isCancel, List<OrderDishDataModel> orderDishes)
+    {
+        Id = id;
+        WorkerId = workerId;
+        BuyerId = buyerId;
+        IsCancel = isCancel;
+        IsConstantClient = isConstantClient;
+        Dishes = orderDishes;
+        var percent = 0.0;
+        Sum = Dishes?.Sum(x => x.Price * x.Count) ?? 0;
+    }
+
+    public SaleDataModel(string id, string workerId, string? buyerId, double sum, bool isConstantClient, bool isCancel, List<OrderDishDataModel> orderDishes, WorkerDataModel worker, BuyerDataModel? buyer) : this(id, workerId, buyerId, isConstantClient, isCancel, orderDishes)
+    {
+        Sum = sum;
+        _worker = worker;
+        _buyer = buyer;
+    }
+
+    public SaleDataModel(string id, string workerId, string? buyerId, double sum, int discountType, List<OrderDishDataModel> dishes) : this(id, workerId, buyerId, true, false, dishes) { }
+
     public void Validate()
     {
         if (Id.IsEmpty())

AndDietCokeProject/AndDietCokeProject/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class ElementDeletedException : Exception
+{
+    public ElementDeletedException(string id) : base($"Cannot modify a deleted item (id: {id})") { }
+}

AndDietCokeProject/AndDietCokeProject/Exceptions/ElementExistsException.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class ElementExistsException : Exception
+{
+    public string ParamName { get; private set; }
+    public string ParamValue { get; private set; }
+    public ElementExistsException(string paramName, string paramValue) : base($"There is already an element with value{paramValue} of parameter { paramName}")
+    {
+    ParamName = paramName;
+    ParamValue = paramValue;
+    }
+}

AndDietCokeProject/AndDietCokeProject/Exceptions/ElementNotFoundException.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class ElementNotFoundException : Exception
+{
+    public string Value { get; private set; }
+    public ElementNotFoundException(string value) : base($"Element not found at value = { value}")
+    {
+    Value = value;
+    }
+}
+

AndDietCokeProject/AndDietCokeProject/Exceptions/IncorrectDatesException.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class IncorrectDatesException : Exception
+{
+    public IncorrectDatesException(DateTime start, DateTime end) : base($"The end date must be later than the start date..StartDate: { start: dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}") { }
+}

AndDietCokeProject/AndDietCokeProject/Exceptions/NullListException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}

AndDietCokeProject/AndDietCokeProject/Exceptions/StorageException.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: { ex.Message}", ex) { }
+}
+

AndDietCokeProject/AndDietCokeProject/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Extensions;
+
+public static class DateTimeExtensions
+{
+    public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+    {
+        return date >= olderDate;
+    }
+}

AndDietCokeProject/AndDietCokeProject/Infrastrusture/IConfigurationDatabase.cs

@@ -0,0 +1,6 @@
+namespace AndDietCokeContracts.Infrastrusture;
+
+public interface IConfigurationDatabase
+{
+    string ConnectionString { get; }
+}

AndDietCokeProject/AndDietCokeProject/Infrastrusture/OperationResponse.cs

@@ -0,0 +1,42 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Infrastrusture;
+
+public class OperationResponse
+{
+    protected HttpStatusCode StatusCode { get; set; }
+
+    protected object? Result { get; set; }
+
+    public IActionResult GetResponse(HttpRequest request, HttpResponse response)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ArgumentNullException.ThrowIfNull(response);
+
+        response.StatusCode = (int)StatusCode;
+
+        if (Result is null)
+        {
+            return new StatusCodeResult((int)StatusCode);
+        }
+
+        return new ObjectResult(Result);
+    }
+
+    protected static TResult OK<TResult, TData>(TData data) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.OK, Result = data };
+
+    protected static TResult NoContent<TResult>() where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.NoContent };
+
+    protected static TResult BadRequest<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.BadRequest, Result = errorMessage };
+
+    protected static TResult NotFound<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.NotFound, Result = errorMessage };
+
+    protected static TResult InternalServerError<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.InternalServerError, Result = errorMessage };
+}

AndDietCokeProject/AndDietCokeProject/StoragesContracts/IBuyerStorageContract.cs

@@ -0,0 +1,19 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IBuyerStorageContract
+{
+    List<BuyerDataModel> GetList();
+    BuyerDataModel? GetElementById(string id);
+    BuyerDataModel? GetElementByPhoneNumber(string phoneNumber);
+    BuyerDataModel? GetElementByFIO(string fio);
+    void AddElement(BuyerDataModel buyerDataModel);
+    void UpdElement(BuyerDataModel buyerDataModel);
+    void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeProject/StoragesContracts/IDishStorageContract.cs

@@ -0,0 +1,18 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+public interface IDishStorageContract
+{
+    List<DishDataModel> GetList(bool onlyActive = true);
+    List<DishHistoryDataModel> GetHistoryByDishId(string dishId);
+    DishDataModel? GetElementById(string id);
+    DishDataModel? GetElementByName(string name);
+    void AddElement(DishDataModel dishDataModel);
+    void UpdElement(DishDataModel dishDataModel);
+    void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeProject/StoragesContracts/IPostStorageContract.cs

@@ -0,0 +1,21 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IPostStorageContract
+{
+    List<PostDataModel> GetList(bool onlyActual = true);
+    List<PostDataModel> GetPostWithHistory(string postId);
+    PostDataModel? GetElementById(string id);
+    PostDataModel? GetElementByName(string name);
+    void AddElement(PostDataModel postDataModel);
+    void UpdElement(PostDataModel postDataModel);
+    void DelElement(string id);
+    void ResElement(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/StoragesContracts/ISalaryStorageContract.cs

@@ -0,0 +1,15 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface ISalaryStorageContract
+{
+    List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string?
+    workerId = null);
+    void AddElement(SalaryDataModel salaryDataModel);
+}

AndDietCokeProject/AndDietCokeProject/StoragesContracts/ISaleStorageContract.cs

@@ -0,0 +1,17 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface ISaleStorageContract
+{
+    List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? workerId = null, string? buyerId = null, string? dishId = null);
+    SaleDataModel? GetElementById(string id);
+    void AddElement(SaleDataModel saleDataModel);
+    void DelElement(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/StoragesContracts/IWorkerStorageContract.cs

@@ -0,0 +1,19 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IWorkerStorageContract
+{
+    List<WorkerDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+    WorkerDataModel? GetElementById(string id);
+    WorkerDataModel? GetElementByFIO(string fio);
+    void AddElement(WorkerDataModel workerDataModel);
+    void UpdElement(WorkerDataModel workerDataModel);
+    void DelElement(string id);
+}
+

AndDietCokeProject/AndDietCokeProject/ViewModels/BuyerViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class BuyerViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/DishHistoryViewModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class DishHistoryViewModel
+{
+    public required string DishName { get; set; }
+
+    public double OldPrice { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/DishViewModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class DishViewModel
+{
+    public required string Id { get; set; }
+
+    public required string DishName { get; set; }
+
+    public required string DishType { get; set; }
+
+    public double Price { get; set; }
+
+    public bool IsDeleted { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/OrderDishViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class OrderDishViewModel
+{
+    public required string DishId { get; set; }
+
+    public required string DishName { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/PostViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class PostViewModel
+{
+    public required string Id { get; set; }
+
+    public required string PostName { get; set; }
+
+    public required string PostType { get; set; }
+
+    public double Salary { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/SalaryViewModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class SalaryViewModel
+{
+    public required string WorkerId { get; set; }
+    public required string WorkerFIO { get; set; }
+    public DateTime SalaryDate { get; set; }
+    public double Salary { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/SaleViewModel.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class SaleViewModel
+{
+    public required string Id { get; set; }
+
+    public required string WorkerId { get; set; }
+
+    public required string WorkerFIO { get; set; }
+
+    public string? BuyerId { get; set; }
+
+    public string? BuyerFIO { get; set; }
+
+    public DateTime SaleDate { get; set; }
+
+    public double Sum { get; set; }
+
+    public required string DiscountType { get; set; }
+
+    public double Discount { get; set; }
+
+    public bool IsCancel { get; set; }
+
+    public required List<OrderDishViewModel> Dishes { get; set; }
+}

AndDietCokeProject/AndDietCokeProject/ViewModels/WorkerViewModel.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.ViewModels;
+
+public class WorkerViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PostId { get; set; }
+
+    public required string PostName { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

AndDietCokeProject/AndDietCokeTests/AndDietCokeTests.csproj

@@ -1,24 +1,48 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
+	<PropertyGroup>
+		<TargetFramework>net9.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
 
-    <IsPackable>false</IsPackable>
-    <IsTestProject>true</IsTestProject>
-  </PropertyGroup>
+		<IsPackable>false</IsPackable>
+		<IsTestProject>true</IsTestProject>
+		<LangVersion>preview</LangVersion>
+	</PropertyGroup>
+	
+	<ItemGroup>
+		<PackageReference Include="AutoMapper" Version="14.0.0" />
+		<PackageReference Include="EntityFramework" Version="6.5.1" />
+		<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.4" />
+		<PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.4" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.4" />
+		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.4" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+		<PackageReference Include="Moq" Version="4.20.72" />
+		<PackageReference Include="Npgsql" Version="9.0.3" />
+		<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+		<PackageReference Include="NUnit" Version="4.3.2" />
+		<PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
+		<PackageReference Include="NUnit.Analyzers" Version="4.7.0">
+		  <PrivateAssets>all</PrivateAssets>
+		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+		<PackageReference Include="coverlet.collector" Version="6.0.4">
+		  <PrivateAssets>all</PrivateAssets>
+		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+		<PackageReference Include="Serilog" Version="4.2.0" />
+	</ItemGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.4.2" />
-    <PackageReference Include="NUnit.Analyzers" Version="3.6.1" />
-    <PackageReference Include="coverlet.collector" Version="3.2.0" />
-  </ItemGroup>
+	<ItemGroup>
+		<ProjectReference Include="..\AndDietCokeBuisnessLogic\AndDietCokeBuisnessLogic.csproj" />
+		<ProjectReference Include="..\AndDietCokeDatabase\AndDietCokeDatabase.csproj" />
+		<ProjectReference Include="..\AndDietCokeProject\AndDietCokeContracts.csproj" />
+		<ProjectReference Include="..\AndDietCokeWebApi\AndDietCokeWebApi.csproj" />
+	</ItemGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\AndDietCokeProject\AndDietCokeContracts.csproj" />
-  </ItemGroup>
+	<ItemGroup>
+		<Using Include="NUnit.Framework" />
+	</ItemGroup>
 
 </Project>

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/BuyerBusinessLogicContractTests.cs

@@ -0,0 +1,356 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeBuisnessLogic.Implementations;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using NUnit.Framework;
+using System;
+using Microsoft.Extensions.Logging;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Moq;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+[TestFixture]
+internal class BuyerBusinessLogicContractTests
+{
+    private BuyerBusinessLogicContract _buyerBusinessLogicContract;
+    private Mock<IBuyerStorageContract> _buyerStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _buyerStorageContract = new Mock<IBuyerStorageContract>();
+        _buyerBusinessLogicContract = new BuyerBusinessLogicContract(_buyerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _buyerStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllBuyers_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<BuyerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1", "+7-111-111-11-11"),
+            new(Guid.NewGuid().ToString(), "fio 2", "+7-555-444-33-23"),
+            new(Guid.NewGuid().ToString(), "fio 3", "+7-777-777-7777"),
+        };
+        _buyerStorageContract.Setup(x => x.GetList()).Returns(listOriginal);
+        //Act
+        var list = _buyerBusinessLogicContract.GetAllBuyers();
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+    }
+
+    [Test]
+    public void GetAllBuyers_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.GetList()).Returns([]);
+        //Act
+        var list = _buyerBusinessLogicContract.GetAllBuyers();
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _buyerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllBuyers_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetAllBuyers(), Throws.TypeOf<NullListException>());
+        _buyerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllBuyers_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.GetList()).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetAllBuyers(), Throws.TypeOf<StorageException>());
+        _buyerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new BuyerDataModel(id, "fio", "+7-111-111-11-11");
+        _buyerStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _buyerBusinessLogicContract.GetBuyerByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetByFio_ReturnRecord_Test()
+    {
+        //Arrange
+        var fio = "fio";
+        var record = new BuyerDataModel(Guid.NewGuid().ToString(), fio, "+7-111-111-11-11");
+        _buyerStorageContract.Setup(x => x.GetElementByFIO(fio)).Returns(record);
+        //Act
+        var element = _buyerBusinessLogicContract.GetBuyerByData(fio);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.FIO, Is.EqualTo(fio));
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetByPhoneNumber_ReturnRecord_Test()
+    {
+        //Arrange
+        var phoneNumber = "+7-111-111-11-11";
+        var record = new BuyerDataModel(Guid.NewGuid().ToString(), "fio", phoneNumber);
+        _buyerStorageContract.Setup(x => x.GetElementByPhoneNumber(phoneNumber)).Returns(record);
+        //Act
+        var element = _buyerBusinessLogicContract.GetBuyerByData(phoneNumber);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PhoneNumber, Is.EqualTo(phoneNumber));
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetBuyerByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetByFio_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData("fio"), Throws.TypeOf<ElementNotFoundException>());
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetBuyerByData_GetByPhoneNumber_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData("+7-111-111-11-12"), Throws.TypeOf<ElementNotFoundException>());
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetBuyerByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _buyerStorageContract.Setup(x => x.GetElementByFIO(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _buyerStorageContract.Setup(x => x.GetElementByPhoneNumber(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData("fio"), Throws.TypeOf<StorageException>());
+        Assert.That(() => _buyerBusinessLogicContract.GetBuyerByData("+7-111-111-11-12"), Throws.TypeOf<StorageException>());
+        _buyerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _buyerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+        _buyerStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertBuyer_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new BuyerDataModel(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11");
+        _buyerStorageContract.Setup(x => x.AddElement(It.IsAny<BuyerDataModel>()))
+            .Callback((BuyerDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.FIO == record.FIO && x.PhoneNumber == record.PhoneNumber;
+            });
+        //Act
+        _buyerBusinessLogicContract.InsertBuyer(record);
+        //Assert
+        _buyerStorageContract.Verify(x => x.AddElement(It.IsAny<BuyerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertBuyer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.AddElement(It.IsAny<BuyerDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.InsertBuyer(new(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<ElementExistsException>());
+        _buyerStorageContract.Verify(x => x.AddElement(It.IsAny<BuyerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertBuyer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.InsertBuyer(null), Throws.TypeOf<ArgumentNullException>());
+        _buyerStorageContract.Verify(x => x.AddElement(It.IsAny<BuyerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertBuyer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.InsertBuyer(new BuyerDataModel("id", "fio", "+7-111-111-11-11")), Throws.TypeOf<ValidationException>());
+        _buyerStorageContract.Verify(x => x.AddElement(It.IsAny<BuyerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertBuyer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.AddElement(It.IsAny<BuyerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.InsertBuyer(new(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<StorageException>());
+        _buyerStorageContract.Verify(x => x.AddElement(It.IsAny<BuyerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateBuyer_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new BuyerDataModel(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11");
+        _buyerStorageContract.Setup(x => x.UpdElement(It.IsAny<BuyerDataModel>()))
+            .Callback((BuyerDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.FIO == record.FIO && x.PhoneNumber == record.PhoneNumber;
+            });
+        //Act
+        _buyerBusinessLogicContract.UpdateBuyer(record);
+        //Assert
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void UpdateBuyer_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.UpdElement(It.IsAny<BuyerDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.UpdateBuyer(new(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<ElementNotFoundException>());
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateBuyer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.UpdElement(It.IsAny<BuyerDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.UpdateBuyer(new(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<ElementExistsException>());
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateBuyer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.UpdateBuyer(null), Throws.TypeOf<ArgumentNullException>());
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateBuyer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.UpdateBuyer(new BuyerDataModel("id", "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<ValidationException>());
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateBuyer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.UpdElement(It.IsAny<BuyerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.UpdateBuyer(new(Guid.NewGuid().ToString(), "Петров Иван Александрович", "+7-111-111-11-11")), Throws.TypeOf<StorageException>());
+        _buyerStorageContract.Verify(x => x.UpdElement(It.IsAny<BuyerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteBuyer_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _buyerStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _buyerBusinessLogicContract.DeleteBuyer(id);
+        //Assert
+        _buyerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void DeleteBuyer_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.DeleteBuyer(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _buyerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteBuyer_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.DeleteBuyer(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _buyerBusinessLogicContract.DeleteBuyer(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _buyerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteBuyer_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.DeleteBuyer("id"), Throws.TypeOf<ValidationException>());
+        _buyerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteBuyer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _buyerStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _buyerBusinessLogicContract.DeleteBuyer(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _buyerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/DishBusinessLogicContractTests.cs

@@ -0,0 +1,404 @@
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeBuisnessLogic.Implementations;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Extensions.Logging;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+internal class DishBusinessLogicContractTests
+{
+    private DishBusinessLogicContract _dishBusinessLogicContract;
+    private Mock<IDishStorageContract> _dishStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _dishStorageContract = new Mock<IDishStorageContract>();
+        _dishBusinessLogicContract = new DishBusinessLogicContract(_dishStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _dishStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllDishes_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<DishDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "name 1", DishType.Dessert, 10, false),
+            new(Guid.NewGuid().ToString(), "name 2", DishType.Dessert, 10, true),
+            new(Guid.NewGuid().ToString(), "name 3", DishType.Dessert, 10, false),
+        };
+        _dishStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _dishBusinessLogicContract.GetAllDishes(true);
+        var list = _dishBusinessLogicContract.GetAllDishes(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _dishStorageContract.Verify(x => x.GetList(true), Times.Once);
+        _dishStorageContract.Verify(x => x.GetList(false), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDishes_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns([]);
+        //Act
+        var listOnlyActive = _dishBusinessLogicContract.GetAllDishes(true);
+        var list = _dishBusinessLogicContract.GetAllDishes(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _dishStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Exactly(2));
+    }
+
+    [Test]
+    public void GetAllDishes_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetAllDishes(It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _dishStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDishes_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetAllDishes(It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+    [Test]
+    public void GetDishHistoryByDish_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var dishId = Guid.NewGuid().ToString();
+        var listOriginal = new List<DishHistoryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), 10),
+            new(Guid.NewGuid().ToString(), 15),
+            new(Guid.NewGuid().ToString(), 10),
+        };
+        _dishStorageContract.Setup(x => x.GetHistoryByDishId(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _dishBusinessLogicContract.GetDishHistoryByDish(dishId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(dishId), Times.Once);
+    }
+
+    [Test]
+    public void GetDishHistoryByDish_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.GetHistoryByDishId(It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _dishBusinessLogicContract.GetDishHistoryByDish(Guid.NewGuid().ToString());
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishHistoryByDish_DishIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishHistoryByDish(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _dishBusinessLogicContract.GetDishHistoryByDish(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetDishHistoryByDish_DishIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishHistoryByDish("dishId"), Throws.TypeOf<ValidationException>());
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetDishHistoryByDish_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishHistoryByDish(Guid.NewGuid().ToString()), Throws.TypeOf<NullListException>());
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishHistoryByDish_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.GetHistoryByDishId(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishHistoryByDish(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.GetHistoryByDishId(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new DishDataModel(id, "name", DishType.Dessert, 10, false);
+        _dishStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _dishBusinessLogicContract.GetDishByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _dishStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var name = "name";
+        var record = new DishDataModel(Guid.NewGuid().ToString(), name, DishType.Dessert, 10, false);
+        _dishStorageContract.Setup(x => x.GetElementByName(name)).Returns(record);
+        //Act
+        var element = _dishBusinessLogicContract.GetDishByData(name);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.DishName, Is.EqualTo(name));
+        _dishStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _dishStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _dishStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetDishByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _dishStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData("name"), Throws.TypeOf<ElementNotFoundException>());
+        _dishStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetDishByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _dishStorageContract.Setup(x => x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _dishBusinessLogicContract.GetDishByData("name"), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _dishStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertDish_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new DishDataModel(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false);
+        _dishStorageContract.Setup(x => x.AddElement(It.IsAny<DishDataModel>()))
+            .Callback((DishDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.DishName == record.DishName && x.DishType == record.DishType && x.Price == record.Price && x.IsDeleted == record.IsDeleted;
+            });
+        //Act
+        _dishBusinessLogicContract.InsertDish(record);
+        //Assert
+        _dishStorageContract.Verify(x => x.AddElement(It.IsAny<DishDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertDish_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.AddElement(It.IsAny<DishDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.InsertDish(new(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false)), Throws.TypeOf<ElementExistsException>());
+        _dishStorageContract.Verify(x => x.AddElement(It.IsAny<DishDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertDish_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.InsertDish(null), Throws.TypeOf<ArgumentNullException>());
+        _dishStorageContract.Verify(x => x.AddElement(It.IsAny<DishDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertDish_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.InsertDish(new DishDataModel("id", "name", DishType.Dessert, 10, false)), Throws.TypeOf<ValidationException>());
+        _dishStorageContract.Verify(x => x.AddElement(It.IsAny<DishDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertDish_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.AddElement(It.IsAny<DishDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.InsertDish(new(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false)), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.AddElement(It.IsAny<DishDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateDish_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new DishDataModel(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false);
+        _dishStorageContract.Setup(x => x.UpdElement(It.IsAny<DishDataModel>()))
+            .Callback((DishDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.DishName == record.DishName && x.DishType == record.DishType && x.Price == record.Price && x.IsDeleted == record.IsDeleted;
+            });
+        //Act
+        _dishBusinessLogicContract.UpdateDish(record);
+        //Assert
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void UpdateDish_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.UpdElement(It.IsAny<DishDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.UpdateDish(new(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false)), Throws.TypeOf<ElementNotFoundException>());
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateDish_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.UpdElement(It.IsAny<DishDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.UpdateDish(new(Guid.NewGuid().ToString(), "anme", DishType.Dessert, 10, false)), Throws.TypeOf<ElementExistsException>());
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateDish_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.UpdateDish(null), Throws.TypeOf<ArgumentNullException>());
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateDish_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.UpdateDish(new DishDataModel("id", "name", DishType.Dessert, 10, false)), Throws.TypeOf<ValidationException>());
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateDish_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.UpdElement(It.IsAny<DishDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.UpdateDish(new(Guid.NewGuid().ToString(), "name", DishType.Dessert, 10, false)), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.UpdElement(It.IsAny<DishDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteDish_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _dishStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _dishBusinessLogicContract.DeleteDish(id);
+        //Assert
+        _dishStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void DeleteDish_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _dishStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.DeleteDish(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _dishStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteDish_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.DeleteDish(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _dishBusinessLogicContract.DeleteDish(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _dishStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteDish_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.DeleteDish("id"), Throws.TypeOf<ValidationException>());
+        _dishStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteDish_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _dishStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _dishBusinessLogicContract.DeleteDish(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _dishStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/PostBusinessLogicContractTests.cs

@@ -0,0 +1,425 @@
+using AndDietCokeContracts.BisnessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeBuisnessLogic.Implementations;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+[TestFixture]
+internal class PostBusinessLogicContractTests
+{
+    private PostBusinessLogicContract _postBusinessLogicContract;
+    private Mock<IPostStorageContract> _postStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _postStorageContract = new Mock<IPostStorageContract>();
+        _postBusinessLogicContract = new
+        PostBusinessLogicContract(_postStorageContract.Object, new Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _postStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllPosts_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<PostDataModel>()
+        {
+            new(Guid.NewGuid().ToString(),"name 1", PostType.Chef, 10, true, DateTime.Now),
+            new(Guid.NewGuid().ToString(),"name 2", PostType.Chef, 10, true, DateTime.Now),
+            new(Guid.NewGuid().ToString(),"name 3", PostType.Chef, 10, true, DateTime.Now)
+        };
+        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _postBusinessLogicContract.GetAllPosts(true);
+        var listAll = _postBusinessLogicContract.GetAllPosts(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(listAll, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(listAll, Is.EquivalentTo(listOriginal));
+        });
+        _postStorageContract.Verify(x => x.GetList(true), Times.Once);
+        _postStorageContract.Verify(x => x.GetList(false), Times.Once);
+    }
+    [Test]
+    public void GetAllPosts_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns([]);
+        //Act
+        var list = _postBusinessLogicContract.GetAllPosts(true);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Is.Not.Null);
+            Assert.That(list, Has.Count.EqualTo(0));
+            });
+        }
+    [Test]
+    public void GetAllPosts_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllPosts(It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+    [Test]
+    public void GetAllPosts_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllPosts(It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        var listOriginal = new List<PostDataModel>()
+        {
+            new(postId,"name 1", PostType.Chef, 10, true, DateTime.Now),
+            new(postId,"name 2", PostType.Chef, 10, true, DateTime.Now)
+        };
+        _postStorageContract.Setup(x => x.GetPostWithHistory(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _postBusinessLogicContract.GetAllDataOfPost(postId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        _postStorageContract.Verify(x => x.GetPostWithHistory(postId), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.GetPostWithHistory(It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString());
+
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.GetPostWithHistory(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost("id"), Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.GetPostWithHistory(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllDataOfPost_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<NullListException>());
+        _postStorageContract.Verify(x => x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.GetPostWithHistory(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new PostDataModel(id,"name", PostType.Chef, 10, true, DateTime.Now);
+        _postStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _postBusinessLogicContract.GetPostByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _postStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var postName = "name";
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now);
+        _postStorageContract.Setup(x => x.GetElementByName(postName)).Returns(record);
+        //Act
+        var element = _postBusinessLogicContract.GetPostByData(postName);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PostName, Is.EqualTo(postName));
+        _postStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _postBusinessLogicContract.GetPostByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _postStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetPostByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _postStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetPostByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData("name"), Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _postStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _postStorageContract.Setup(x => x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _postBusinessLogicContract.GetPostByData("name"), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _postStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertPost_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now);
+        _postStorageContract.Setup(x => x.AddElement(It.IsAny<PostDataModel>()))
+        .Callback((PostDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary;
+        });
+        //Act
+        _postBusinessLogicContract.InsertPost(record);
+        //Assert
+        _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertPost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.AddElement(It.IsAny<PostDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementExistsException>());
+        _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertPost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(null), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertPost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new PostDataModel("id", "name", PostType.Chef, 10, true, DateTime.Now)), Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.AddElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.UtcNow)), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now);
+        _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>()))
+        .Callback((PostDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary;
+        });
+        //Act
+        _postBusinessLogicContract.UpdatePost(record);
+        //Assert
+        _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void UpdatePost_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now)), Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now)), Throws.TypeOf<ElementExistsException>());
+        _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(null), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdatePost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new PostDataModel("id", "name", PostType.Chef, 10, true, DateTime.UtcNow)), Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdatePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Chef, 10, true, DateTime.Now)), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void DeletePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _postStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _postBusinessLogicContract.DeletePost(id);
+        //Assert
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    } 
+    [Test] 
+    public void DeletePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void DeletePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _postBusinessLogicContract.DeletePost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void DeletePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost("id"), Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void DeletePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void RestorePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _postStorageContract.Setup(x => x.ResElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _postBusinessLogicContract.RestorePost(id);
+        //Assert
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void RestorePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x => x.ResElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void RestorePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _postBusinessLogicContract.RestorePost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void RestorePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost("id"), Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void RestorePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x => x.ResElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+    }
+}
+
+

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/SalaryBusinessLogicContractTests.cs

@@ -0,0 +1,354 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeBuisnessLogic.Implementations;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+[TestFixture]
+internal class SalaryBuisnessLogicContractTests
+{
+    private SalaryBusinessLogicContract _salaryBusinessLogicContract;
+    private Mock<ISalaryStorageContract> _salaryStorageContract;
+    private Mock<ISaleStorageContract> _saleStorageContract;
+    private Mock<IPostStorageContract> _postStorageContract;
+    private Mock<IWorkerStorageContract> _workerStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _salaryStorageContract = new Mock<ISalaryStorageContract>();
+        _saleStorageContract = new Mock<ISaleStorageContract>();
+        _postStorageContract = new Mock<IPostStorageContract>();
+        _workerStorageContract = new Mock<IWorkerStorageContract>();
+        _salaryBusinessLogicContract = new SalaryBusinessLogicContract(_salaryStorageContract.Object,
+            _saleStorageContract.Object, _postStorageContract.Object, _workerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract.Reset();
+        _saleStorageContract.Reset();
+        _postStorageContract.Reset();
+        _workerStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllSalaries_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 10),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1), 14),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(-1), 30),
+        };
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _salaryBusinessLogicContract.GetAllSalariesByPeriod(startDate, endDate);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalaries_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalaries_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var dateTime = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime, dateTime), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime, dateTime.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalaries_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalaries_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var workerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 10),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1), 14),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(-1), 30),
+        };
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(startDate, endDate, workerId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate, workerId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString());
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var dateTime = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(dateTime, dateTime, Guid.NewGuid().ToString()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(dateTime, dateTime.AddSeconds(-1), Guid.NewGuid().ToString()), Throws.TypeOf<IncorrectDatesException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_WorkerIdIsNUllOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_WorkerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), "workerId"), Throws.TypeOf<ValidationException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()), Throws.TypeOf<NullListException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByWorker_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_CalculateSalary_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        int saleSum = 200;
+        var postSalary = 2000.0;
+
+        var dish = new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), saleSum, 1) ;
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), workerId, null, true, false, [dish])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Waiter, postSalary, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        var sum = 0.0;
+        var expectedSum = postSalary + saleSum * 0.1;
+        _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
+            .Callback((SalaryDataModel x) =>
+            {
+                sum = x.Salary;
+            });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_WithSeveralWorkers_Test()
+    {
+        //Arrange
+        var worker1Id = Guid.NewGuid().ToString();
+        var worker2Id = Guid.NewGuid().ToString();
+        var worker3Id = Guid.NewGuid().ToString();
+        var list = new List<WorkerDataModel>() {
+            new(worker1Id, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
+            new(worker2Id, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
+            new(worker3Id, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), worker1Id, null, true, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), worker1Id, null, true, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), worker2Id, null, true, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), worker3Id, null, true, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), worker3Id, null, true, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns(list);
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
+        //Assert
+        _salaryStorageContract.Verify(x => x.AddElement(It.IsAny<SalaryDataModel>()), Times.Exactly(list.Count));
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_WithoitSalesByWorker_Test()
+    {
+        //Arrange
+        var postSalary = 2000.0;
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, postSalary, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        var sum = 0.0;
+        var expectedSum = postSalary;
+        _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
+            .Callback((SalaryDataModel x) =>
+            {
+                sum = x.Salary;
+            });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_SaleStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_PostStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), workerId, null, true, false, [])]);
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_WorkerStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), workerId, null, true, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 2000, true, DateTime.UtcNow));
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_SaleStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Throws(new StorageException(new InvalidOperationException()));
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_PostStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), workerId, null, true, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Throws(new StorageException(new InvalidOperationException()));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new WorkerDataModel(workerId, "Test", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void CalculateSalaryByMounth_WorkerStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), workerId, null, true, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Chef, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
+    }
+}

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/SaleBusinessLogicContractTests.cs

@@ -0,0 +1,502 @@
+using AndDietCokeBuisnessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeContracts.Enums;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Extensions.Logging;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+[TestFixture]
+internal class SaleBuisnessLogicContractTests
+{
+    private SaleBusinessLogicContract _saleBusinessLogicContract;
+    private Mock<ISaleStorageContract> _saleStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _saleStorageContract = new Mock<ISaleStorageContract>();
+        _saleBusinessLogicContract = new SaleBusinessLogicContract(_saleStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _saleStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllSalesByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<SaleDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByPeriod(date, date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _saleStorageContract.Verify(x => x.GetList(date, date.AddDays(1), null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByPeriod(date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByPeriod(date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var workerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SaleDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false,
+                [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(workerId, date, date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _saleStorageContract.Verify(x => x.GetList(date, date.AddDays(1), workerId, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(Guid.NewGuid().ToString(), date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(Guid.NewGuid().ToString(), date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_WorkerIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(null, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(string.Empty, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_WorkerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod("workerId", DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByWorkerByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByWorkerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var buyerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SaleDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false,
+                [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(buyerId, date, date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _saleStorageContract.Verify(x => x.GetList(date, date.AddDays(1), null, buyerId, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(Guid.NewGuid().ToString(), date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(Guid.NewGuid().ToString(), date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_BuyerIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(null, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(string.Empty, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_BuyerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod("buyerId", DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByBuyerByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByBuyerByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var dishId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SaleDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false,
+                [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, true, false, []),
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByDishByPeriod(dishId, date, date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _saleStorageContract.Verify(x => x.GetList(date, date.AddDays(1), null, null, dishId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list = _saleBusinessLogicContract.GetAllSalesByDishByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(Guid.NewGuid().ToString(), date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(Guid.NewGuid().ToString(), date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_DishIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(null, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(string.Empty, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_DishIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod("dishId", DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalesByDishByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetAllSalesByDishByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSaleByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new SaleDataModel(id, Guid.NewGuid().ToString(), null, true, false,
+                [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)]);
+        _saleStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _saleBusinessLogicContract.GetSaleByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _saleStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSaleByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetSaleByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _saleBusinessLogicContract.GetSaleByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetSaleByData_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetSaleByData("saleId"), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetSaleByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetSaleByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _saleStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSaleByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.GetSaleByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSale_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new SaleDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), true, false, [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)]);
+        _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>()))
+            .Callback((SaleDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.WorkerId == record.WorkerId && x.BuyerId == record.BuyerId &&
+                    x.SaleDate == record.SaleDate && x.Sum == record.Sum && x.IsCancel == record.IsCancel && x.Dishes.Count == record.Dishes.Count &&
+                    x.Dishes.First().DishId == record.Dishes.First().DishId &&
+                    x.Dishes.First().Count == record.Dishes.First().Count;
+            });
+        //Act
+        _saleBusinessLogicContract.InsertSale(record);
+        //Assert
+        _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertSale_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), true, false, [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)])), Throws.TypeOf<ElementExistsException>());
+        _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSale_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(null), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertSale_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(new SaleDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), true, false, [])), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertSale_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), true, false, [new OrderDishDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 20, 5)])), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void CancelSale_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _saleStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _saleBusinessLogicContract.CancelSale(id);
+        //Assert
+        _saleStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void CancelSale_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _saleStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.CancelSale(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _saleStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void CancelSale_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.CancelSale(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _saleBusinessLogicContract.CancelSale(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _saleStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void CancelSale_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.CancelSale("id"), Throws.TypeOf<ValidationException>());
+        _saleStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void CancelSale_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _saleStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _saleBusinessLogicContract.CancelSale(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _saleStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

AndDietCokeProject/AndDietCokeTests/BuisnessLogicsContractsTests/WorkerBusinessLogicContractTests.cs

@@ -0,0 +1,562 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeBuisnessLogic.Implementations;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using Microsoft.Extensions.Logging;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.BuisnessLogicsContractsTests;
+
+internal class WorkerBusinessLogicContractTests
+{
+    private WorkerBusinessLogicContract _workerBusinessLogicContract;
+    private Mock<IWorkerStorageContract> _workerStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _workerStorageContract = new Mock<IWorkerStorageContract>();
+        _workerBusinessLogicContract = new WorkerBusinessLogicContract(_workerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _workerStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllWorkers_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<WorkerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+            new(Guid.NewGuid().ToString(), "fio 2", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, true),
+            new(Guid.NewGuid().ToString(), "fio 3", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+        };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkers(true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null, null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkers_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkers(true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), null, null, null, null, null), Times.Exactly(2));
+    }
+
+    [Test]
+    public void GetAllWorkers_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkers(It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkers_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkers(It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), null, null, null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        var listOriginal = new List<WorkerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+            new(Guid.NewGuid().ToString(), "fio 2", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, true),
+            new(Guid.NewGuid().ToString(), "fio 3", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+        };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByPost(postId, true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByPost(postId, false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, postId, null, null, null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, postId, null, null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(), true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(), false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Exactly(2));
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_PostIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByPost(null, It.IsAny<bool>()), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByPost(string.Empty, It.IsAny<bool>()), Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_PostIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByPost("postId", It.IsAny<bool>()), Throws.TypeOf<ValidationException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(), It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(), It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<WorkerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+            new(Guid.NewGuid().ToString(), "fio 2", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, true),
+            new(Guid.NewGuid().ToString(), "fio 3", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+        };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddDays(1), true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddDays(1), false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, date, date.AddDays(1), null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, date, date.AddDays(1), null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByBirthDate_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date, It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddSeconds(-1), It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByBirthDate_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<WorkerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+            new(Guid.NewGuid().ToString(), "fio 2", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, true),
+            new(Guid.NewGuid().ToString(), "fio 3", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false),
+        };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date.AddDays(1), true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date.AddDays(1), false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null, date, date.AddDays(1)), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null, date, date.AddDays(1)), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive = _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null, It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null, It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByEmploymentDate_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date, It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date.AddSeconds(-1), It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllWorkersByEmploymentDate_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetWorkerByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new WorkerDataModel(id, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        _workerStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _workerBusinessLogicContract.GetWorkerByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _workerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetWorkerByData_GetByFio_ReturnRecord_Test()
+    {
+        //Arrange
+        var fio = "fio";
+        var record = new WorkerDataModel(Guid.NewGuid().ToString(), fio, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        _workerStorageContract.Setup(x => x.GetElementByFIO(fio)).Returns(record);
+        //Act
+        var element = _workerBusinessLogicContract.GetWorkerByData(fio);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.FIO, Is.EqualTo(fio));
+        _workerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetWorkerByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _workerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetWorkerByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _workerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _workerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetWorkerByData_GetByFio_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData("fio"), Throws.TypeOf<ElementNotFoundException>());
+        _workerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _workerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetWorkerByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _workerStorageContract.Setup(x => x.GetElementByFIO(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData("fio"), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _workerStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertWorker_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        _workerStorageContract.Setup(x => x.AddElement(It.IsAny<WorkerDataModel>()))
+            .Callback((WorkerDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.FIO == record.FIO && x.PostId == record.PostId && x.BirthDate == record.BirthDate &&
+                    x.EmploymentDate == record.EmploymentDate && x.IsDeleted == record.IsDeleted;
+            });
+        //Act
+        _workerBusinessLogicContract.InsertWorker(record);
+        //Assert
+        _workerStorageContract.Verify(x => x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertWorker_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.AddElement(It.IsAny<WorkerDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ElementExistsException>());
+        _workerStorageContract.Verify(x => x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertWorker_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.InsertWorker(null), Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.AddElement(It.IsAny<WorkerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertWorker_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.InsertWorker(new WorkerDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ValidationException>());
+        _workerStorageContract.Verify(x => x.AddElement(It.IsAny<WorkerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertWorker_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.AddElement(It.IsAny<WorkerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateWorker_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        _workerStorageContract.Setup(x => x.UpdElement(It.IsAny<WorkerDataModel>()))
+            .Callback((WorkerDataModel x) =>
+            {
+                flag = x.Id == record.Id && x.FIO == record.FIO && x.PostId == record.PostId && x.BirthDate == record.BirthDate &&
+                    x.EmploymentDate == record.EmploymentDate && x.IsDeleted == record.IsDeleted;
+            });
+        //Act
+        _workerBusinessLogicContract.UpdateWorker(record);
+        //Assert
+        _workerStorageContract.Verify(x => x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void UpdateWorker_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.UpdElement(It.IsAny<WorkerDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ElementNotFoundException>());
+        _workerStorageContract.Verify(x => x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateWorker_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.UpdateWorker(null), Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateWorker_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.UpdateWorker(new WorkerDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ValidationException>());
+        _workerStorageContract.Verify(x => x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateWorker_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.UpdElement(It.IsAny<WorkerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteWorker_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _workerStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _workerBusinessLogicContract.DeleteWorker(id);
+        //Assert
+        _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void DeleteWorker_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _workerStorageContract.Setup(x => x.DelElement(It.Is((string x) => x != id))).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.DeleteWorker(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteWorker_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.DeleteWorker(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _workerBusinessLogicContract.DeleteWorker(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteWorker_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.DeleteWorker("id"), Throws.TypeOf<ValidationException>());
+        _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteWorker_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.DeleteWorker(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/OrderDataModelTests.cs

@@ -15,41 +15,41 @@ internal class OrderDataModelTests
     [Test]
     public void OrderIdIsNullOrEmptyTest()
     {
-        var orderDish = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        var orderDish = CreateDataModel(null, Guid.NewGuid().ToString(), 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
-        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void OrderIdIsNotGuidTest()
     {
-        var orderDish = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
+        var orderDish = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void DishIdIsNullOrEmptyTest()
     {
-        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), null, 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
-        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void DishIdIsNotGuidTest()
     {
-        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), "dishId", 10);
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), "dishId", 10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void CountIsLessOrZeroTest()
     {
-        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
-        orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, 20);
         Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
     }
 
@@ -59,7 +59,8 @@ internal class OrderDataModelTests
         var orderId = Guid.NewGuid().ToString();
         var dishId = Guid.NewGuid().ToString();
         var count = 10;
-        var orderDish = CreateDataModel(orderId, dishId, count);
+        var price = 20;
+        var orderDish = CreateDataModel(orderId, dishId, count, price);
         Assert.That(() => orderDish.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
@@ -69,6 +70,6 @@ internal class OrderDataModelTests
         });
     }
 
-    private static OrderDishDataModel CreateDataModel(string? orderId, string? dishId, int count) => new(orderId, dishId, count);
+    private static OrderDishDataModel CreateDataModel(string? orderId, string? dishId, int count, int price) => new(orderId, dishId, count, price);
 
 }

AndDietCokeProject/AndDietCokeTests/DataModelsTests/PostDataModelTests.cs

@@ -16,51 +16,51 @@ internal class PostDataModelTests
     [Test]
     public void IdIsNullOrEmptyTest()
     {
-        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel("0", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
-        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        post = CreateDataModel(string.Empty, "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void IdIsNotGuidTest()
     {
-        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel("id", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void PostIdIsNullEmptyTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel("0", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
-        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        post = CreateDataModel("0", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void PostIdIsNotGuidTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel("0", "name", PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void PostNameIsEmptyTest()
     {
-        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, PostType.Waiter, 10, true, DateTime.UtcNow);
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
-        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Waiter, 10, true, DateTime.UtcNow);
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, PostType.Waiter, 10, true, DateTime.UtcNow);
         Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void PostTypeIsNoneTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void SalaryIsLessOrZeroTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Waiter, 0, true, DateTime.UtcNow);
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Waiter, 0, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
-        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Waiter, -10, true, DateTime.UtcNow);
+        post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Waiter, -10, true, DateTime.UtcNow);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
@@ -73,20 +73,17 @@ internal class PostDataModelTests
         var salary = 10;
         var isActual = false;
         var changeDate = DateTime.UtcNow.AddDays(-1);
-        var post = CreateDataModel(postId, postPostId, postName, postType, salary, isActual, changeDate);
+        var post = CreateDataModel(postId, postName, postType, salary, isActual, changeDate);
         Assert.That(() => post.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
             Assert.That(post.Id, Is.EqualTo(postId));
-            Assert.That(post.PostId, Is.EqualTo(postPostId));
             Assert.That(post.PostName, Is.EqualTo(postName));
             Assert.That(post.PostType, Is.EqualTo(postType));
             Assert.That(post.Salary, Is.EqualTo(salary));
-            Assert.That(post.IsActual, Is.EqualTo(isActual));
-            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
         });
     }
-    private static PostDataModel CreateDataModel(string? id, string? postId, string? postName, PostType postType, double salary, bool isActual, DateTime changeDate) => new(id, postId, postName, postType, salary, isActual, changeDate);
+    private static PostDataModel CreateDataModel(string? id, string? postName, PostType postType, double salary, bool isActual, DateTime changeDate) => new(id, postName, postType, salary, isActual, changeDate);
 }
 
 

AndDietCokeProject/AndDietCokeTests/DataModelsTests/SaleDataModelTests.cs

@@ -61,7 +61,7 @@ internal class SaleDataModelTests
     }
 
     [Test]
-    public void ProductsIsNullOrEmptyTest()
+    public void DishesIsNullOrEmptyTest()
     {
         var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, true, false, null);
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
@@ -75,7 +75,7 @@ internal class SaleDataModelTests
         var saleId = Guid.NewGuid().ToString();
         var workerId = Guid.NewGuid().ToString();
         var buyerId = Guid.NewGuid().ToString();
-        var sum = 10;
+        var sum = 20;
         var isConstantClient = true;
         var isCancel = true;
         var dishes = CreateSubDataModel();
@@ -93,7 +93,7 @@ internal class SaleDataModelTests
         });
     }
 
-    private static SaleDataModel CreateDataModel(string? id, string? workerId, string? buyerId, double sum, bool IsConstantClient, bool isCancel, List<OrderDishDataModel>? dishes) => new(id, workerId, buyerId, sum, IsConstantClient, isCancel, dishes);
-    private static List<OrderDishDataModel> CreateSubDataModel() => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+    private static SaleDataModel CreateDataModel(string? id, string? workerId, string? buyerId, double sum, bool IsConstantClient, bool isCancel, List<OrderDishDataModel>? dishes) => new(id, workerId, buyerId, sum, IsConstantClient, isCancel, dishes, null, null);
+    private static List<OrderDishDataModel> CreateSubDataModel() => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1, 20)];
 
 }

AndDietCokeProject/AndDietCokeTests/Infrastructure/AndDietCokeDbContextExtensions.cs

@@ -0,0 +1,110 @@
+using AndDietCokeContracts.Enums;
+using AndDietCokeDatabase;
+using AndDietCokeDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+using Microsoft.EntityFrameworkCore;
+
+namespace AndDietCokeTests.Infrastructure;
+
+internal static class AndDietCokeDbContextExtensions
+{
+    public static Buyer InsertBuyerToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string? id = null, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+    {
+        var buyer = new Buyer() { Id = id ?? Guid.NewGuid().ToString(), FIO = fio, PhoneNumber = phoneNumber, DiscountSize = discountSize };
+        dbContext.Buyers.Add(buyer);
+        dbContext.SaveChanges();
+        return buyer;
+    }
+
+    public static Post InsertPostToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string? id = null, string postName = "test", PostType postType = PostType.Packer, double salary = 10, bool isActual = true, DateTime? changeDate = null)
+    {
+        var post = new Post() { Id = id ?? Guid.NewGuid().ToString(), PostId = Guid.NewGuid().ToString(), PostName = postName, PostType = postType, Salary = salary, IsActual = isActual, ChangeDate = changeDate ?? DateTime.UtcNow };
+        dbContext.Posts.Add(post);
+        dbContext.SaveChanges();
+        return post;
+    }
+
+    public static Dish InsertDishToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string? id = null, string dishName = "test", DishType dishType = DishType.Drink, double price = 1, bool isDeleted = false)
+    {
+        var dish = new Dish() { Id = id ?? Guid.NewGuid().ToString(), DishName = dishName, DishType = dishType, Price = price, IsDeleted = isDeleted };
+        dbContext.Dishes.Add(dish);
+        dbContext.SaveChanges();
+        return dish;
+    }
+
+    public static DishHistory InsertDishHistoryToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string dishId, double price = 10, DateTime? changeDate = null)
+    {
+        var dishHistory = new DishHistory() { Id = Guid.NewGuid().ToString(), DishId = dishId, OldPrice = price, ChangeDate = changeDate ?? DateTime.UtcNow };
+        dbContext.DishHistories.Add(dishHistory);
+        dbContext.SaveChanges();
+        return dishHistory;
+    }
+
+    public static Salary InsertSalaryToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string workerId, double workerSalary = 1, DateTime? salaryDate = null)
+    {
+        dbContext.ChangeTracker.Clear();
+
+        var salary = new Salary() { WorkerId = workerId, WorkerSalary = workerSalary, SalaryDate = salaryDate ?? DateTime.UtcNow };
+        dbContext.Salaries.Add(salary);
+        dbContext.SaveChanges();
+        return salary;
+    }
+
+    public static Sale InsertSaleToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string workerId, string? buyerId = null, DateTime? saleDate = null, double sum = 1, bool isConstantClient = false, bool isCancel = false, List<(string, int, double)>? dishes = null)
+    {
+        var sale = new Sale() { WorkerId = workerId, BuyerId = buyerId, SaleDate = saleDate ?? DateTime.UtcNow, Sum = sum, IsConstantClient = isConstantClient, IsCancel = isCancel, OrderDishes = [] };
+        if (dishes is not null)
+        {
+            foreach (var elem in dishes)
+            {
+                sale.OrderDishes.Add(new OrderDish { DishId = elem.Item1, OrderId = sale.Id, Count = elem.Item2 });
+            }
+        }
+        dbContext.Sales.Add(sale);
+        dbContext.SaveChanges();
+        return sale;
+    }
+
+    public static Worker InsertWorkerToDatabaseAndReturn(this AndDietCokeDbContext dbContext, string? id = null, string fio = "test", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false)
+    {
+        var worker = new Worker() { Id = id ?? Guid.NewGuid().ToString(), FIO = fio, PostId = postId ?? Guid.NewGuid().ToString(), BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20), EmploymentDate = employmentDate ?? DateTime.UtcNow, IsDeleted = isDeleted };
+        dbContext.Workers.Add(worker);
+        dbContext.SaveChanges();
+        return worker;
+    }
+
+    public static Buyer? GetBuyerFromDatabase(this AndDietCokeDbContext dbContext, string id) => dbContext.Buyers.FirstOrDefault(x => x.Id == id);
+
+    public static Post? GetPostFromDatabaseByPostId(this AndDietCokeDbContext dbContext, string id) => dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual);
+
+    public static Post[] GetPostsFromDatabaseByPostId(this AndDietCokeDbContext dbContext, string id) => [.. dbContext.Posts.Where(x => x.PostId == id).OrderByDescending(x => x.ChangeDate)];
+
+    public static Dish? GetDishFromDatabaseById(this AndDietCokeDbContext dbContext, string id) => dbContext.Dishes.FirstOrDefault(x => x.Id == id);
+
+    public static Salary[] GetSalariesFromDatabaseByWorkerId(this AndDietCokeDbContext dbContext, string id) => [.. dbContext.Salaries.Where(x => x.WorkerId == id)];
+
+    public static Sale? GetSaleFromDatabaseById(this AndDietCokeDbContext dbContext, string id) => dbContext.Sales.Include(x => x.OrderDishes).FirstOrDefault(x => x.Id == id);
+
+    public static Sale[] GetSalesByBuyerId(this AndDietCokeDbContext dbContext, string? buyerId) => [.. dbContext.Sales.Include(x => x.OrderDishes).Where(x => x.BuyerId == buyerId)];
+
+    public static Worker? GetWorkerFromDatabaseById(this AndDietCokeDbContext dbContext, string id) => dbContext.Workers.FirstOrDefault(x => x.Id == id);
+
+    public static void RemoveBuyersFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Buyers\" CASCADE;");
+
+    public static void RemovePostsFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Posts\" CASCADE;");
+
+    public static void RemoveDishesFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Dishes\" CASCADE;");
+
+    public static void RemoveSalariesFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Salaries\" CASCADE;");
+
+    public static void RemoveSalesFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+
+    public static void RemoveWorkersFromDatabase(this AndDietCokeDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Workers\" CASCADE;");
+
+    private static void ExecuteSqlRaw(this AndDietCokeDbContext dbContext, string command) => dbContext.Database.ExecuteSqlRaw(command);
+}

AndDietCokeProject/AndDietCokeTests/Infrastructure/ConfigurationDatabaseTest.cs

@@ -0,0 +1,14 @@
+using AndDietCokeContracts.Infrastrusture;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.Infrastructure;
+
+internal class ConfigurationDatabaseTest : IConfigurationDatabase
+{
+    public string ConnectionString =>
+        "Host=127.0.0.1;Port=5432;Database=AndDietCokeTest;Username=postgres;Password=postgres;";
+}

AndDietCokeProject/AndDietCokeTests/Infrastructure/CustomWebApplicationFactory.cs

@@ -0,0 +1,36 @@
+using AndDietCokeContracts.Infrastrusture;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.Infrastructure;
+
+internal class CustomWebApplicationFactory<TProgram> : WebApplicationFactory<TProgram>
+    where TProgram : class
+{
+    protected override void ConfigureWebHost(IWebHostBuilder builder)
+    {
+        builder.ConfigureServices(services =>
+        {
+            var databaseConfig = services.SingleOrDefault(x => x.ServiceType == typeof(IConfigurationDatabase));
+            if (databaseConfig is not null)
+                services.Remove(databaseConfig);
+
+            var loggerFactory = services.SingleOrDefault(x => x.ServiceType == typeof(LoggerFactory));
+            if (loggerFactory is not null)
+                services.Remove(loggerFactory);
+
+            services.AddSingleton<IConfigurationDatabase, ConfigurationDatabaseTest>();
+        });
+
+        builder.UseEnvironment("Development");
+
+        base.ConfigureWebHost(builder);
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/BaseStorageContractTest.cs

@@ -0,0 +1,31 @@
+using AndDietCokeTests.Infrastructure;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeDatabase;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+internal abstract class BaseStorageContractTest
+{
+    protected AndDietCokeDbContext AndDietCokeDbContext { get; private set; }
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        AndDietCokeDbContext = new AndDietCokeDbContext(new ConfigurationDatabaseTest());
+
+        AndDietCokeDbContext.Database.EnsureDeleted();
+        AndDietCokeDbContext.Database.EnsureCreated();
+    }
+
+    [OneTimeTearDown]
+    public void OneTimeTearDown()
+    {
+        AndDietCokeDbContext.Database.EnsureDeleted();
+        AndDietCokeDbContext.Dispose();
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/BuyerStorageContractTests.cs

@@ -0,0 +1,201 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using NUnit.Framework;
+using AndDietCokeDatabase.Implementations;
+using AndDietCokeDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using AndDietCokeTests.Infrastructure;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+
+[TestFixture]
+internal class BuyerStorageContractTests : BaseStorageContractTest
+{
+    private BuyerStorageContract _buyerStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _buyerStorageContract = new BuyerStorageContract(AndDietCokeDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveSalesFromDatabase();
+        AndDietCokeDbContext.RemoveWorkersFromDatabase();
+        AndDietCokeDbContext.RemoveBuyersFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+6-666-666-66-66");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+7-777-777-77-77");
+        var list = _buyerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == buyer.Id), buyer);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _buyerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        AssertElement(_buyerStorageContract.GetElementById(buyer.Id), buyer);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        Assert.That(() => _buyerStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        AssertElement(_buyerStorageContract.GetElementByFIO(buyer.FIO), buyer);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        Assert.That(() => _buyerStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenHaveRecord_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        AssertElement(_buyerStorageContract.GetElementByPhoneNumber(buyer.PhoneNumber), buyer);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        Assert.That(() => _buyerStorageContract.GetElementByPhoneNumber("+8-888-888-88-88"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var buyer = CreateModel(Guid.NewGuid().ToString());
+        _buyerStorageContract.AddElement(buyer);
+        AssertElement(AndDietCokeDbContext.GetBuyerFromDatabase(buyer.Id), buyer);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var buyer = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyer.Id);
+        Assert.That(() => _buyerStorageContract.AddElement(buyer), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSamePhoneNumber_Test()
+    {
+        var buyer = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: buyer.PhoneNumber);
+        Assert.That(() => _buyerStorageContract.AddElement(buyer), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var buyer = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyer.Id);
+        _buyerStorageContract.UpdElement(buyer);
+        AssertElement(AndDietCokeDbContext.GetBuyerFromDatabase(buyer.Id), buyer);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _buyerStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSamePhoneNumber_Test()
+    {
+        var buyer = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyer.Id, phoneNumber: "+7-777-777-77-77");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: buyer.PhoneNumber);
+        Assert.That(() => _buyerStorageContract.UpdElement(buyer), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        _buyerStorageContract.DelElement(buyer.Id);
+        Assert.That(AndDietCokeDbContext.GetBuyerFromDatabase(buyer.Id), Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenHaveSalesByThisBuyer_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, buyer.Id);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, buyer.Id);
+        var salesBeforeDelete = AndDietCokeDbContext.GetSalesByBuyerId(buyer.Id);
+        _buyerStorageContract.DelElement(buyer.Id);
+        var element = AndDietCokeDbContext.GetBuyerFromDatabase(buyer.Id);
+        var salesAfterDelete = AndDietCokeDbContext.GetSalesByBuyerId(buyer.Id);
+        var salesNoBuyers = AndDietCokeDbContext.GetSalesByBuyerId(null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Null);
+            Assert.That(salesBeforeDelete, Has.Length.EqualTo(2));
+            Assert.That(salesAfterDelete, Is.Empty);
+            Assert.That(salesNoBuyers, Has.Length.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _buyerStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private static void AssertElement(BuyerDataModel? actual, Buyer expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+        });
+    }
+
+    private static BuyerDataModel CreateModel(string id, string fio = "test", string phoneNumber = "+7-777-777-77-77")
+        => new(id, fio, phoneNumber);
+
+    private static void AssertElement(Buyer? actual, BuyerDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/DishStorageContractTests.cs

@@ -0,0 +1,296 @@
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeDatabase.Implementations;
+using AndDietCokeDatabase.Models;
+using AndDietCokeContracts.DataModels;
+using Microsoft.EntityFrameworkCore;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+using AndDietCokeTests.Infrastructure;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+[TestFixture]
+internal class DishStorageContractTests : BaseStorageContractTest
+{
+    private DishStorageContract _dishStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _dishStorageContract = new DishStorageContract(AndDietCokeDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveDishesFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3");
+        var list = _dishStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == dish.Id), dish);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _dishStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyActual_Test()
+    {
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3", isDeleted: false);
+        var list = _dishStorageContract.GetList(onlyActive: true);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(!list.Any(x => x.IsDeleted));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_IncludeNoActual_Test()
+    {
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3", isDeleted: false);
+        var list = _dishStorageContract.GetList(onlyActive: false);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(3));
+            Assert.That(list.Count(x => x.IsDeleted), Is.EqualTo(2));
+            Assert.That(list.Count(x => !x.IsDeleted), Is.EqualTo(1));
+        });
+    }
+
+    [Test]
+    public void Try_GetHistoryByDishId_WhenHaveRecords_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 20, DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _dishStorageContract.GetHistoryByDishId(dish.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+    }
+
+    [Test]
+    public void Try_GetHistoryByDishId_WhenNoRecords_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 20, DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _dishStorageContract.GetHistoryByDishId(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AssertElement(_dishStorageContract.GetElementById(dish.Id), dish);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        Assert.That(() => _dishStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordWasDeleted_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true);
+        Assert.That(() => _dishStorageContract.GetElementById(dish.Id), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AssertElement(_dishStorageContract.GetElementByName(dish.DishName), dish);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        Assert.That(() => _dishStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenRecordWasDeleted_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true);
+        Assert.That(() => _dishStorageContract.GetElementById(dish.DishName), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), isDeleted: false);
+        _dishStorageContract.AddElement(dish);
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dish.Id), dish);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenIsDeletedIsTrue_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), isDeleted: true);
+        Assert.That(() => _dishStorageContract.AddElement(dish), Throws.Nothing);
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dish.Id), CreateModel(dish.Id, isDeleted: false));
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dish.Id, dishName: "name unique");
+        Assert.That(() => _dishStorageContract.AddElement(dish), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), "name unique", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dish.DishName, isDeleted: false);
+        Assert.That(() => _dishStorageContract.AddElement(dish), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameNameButOneWasDeleted_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), "name unique", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dish.DishName, isDeleted: true);
+        Assert.That(() => _dishStorageContract.AddElement(dish), Throws.Nothing);
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(id: dish.Id, isDeleted: false);
+        _dishStorageContract.UpdElement(dish);
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dish.Id), dish);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenIsDeletedIsTrue_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dish.Id, isDeleted: false);
+        _dishStorageContract.UpdElement(dish);
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dish.Id), CreateModel(dish.Id, isDeleted: false));
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _dishStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), "name unique", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dish.Id, dishName: "name");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dish.DishName);
+        Assert.That(() => _dishStorageContract.UpdElement(dish), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameNameButOneWasDeleted_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString(), "name unique", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dish.Id, dishName: "name");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dish.DishName, isDeleted: true);
+        Assert.That(() => _dishStorageContract.UpdElement(dish), Throws.Nothing);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenRecordWasDeleted_Test()
+    {
+        var dish = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dish.Id, isDeleted: true);
+        Assert.That(() => _dishStorageContract.UpdElement(dish), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: false);
+        _dishStorageContract.DelElement(dish.Id);
+        var element = AndDietCokeDbContext.GetDishFromDatabaseById(dish.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsDeleted);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _dishStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasDeleted_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true);
+        Assert.That(() => _dishStorageContract.DelElement(dish.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private static void AssertElement(DishDataModel? actual, Dish expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.DishName, Is.EqualTo(expected.DishName));
+            Assert.That(actual.DishType, Is.EqualTo(expected.DishType));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static DishDataModel CreateModel(string id, string dishName = "test", DishType dishType = DishType.Drink, double price = 1, bool isDeleted = false)
+        => new(id, dishName, dishType, price, isDeleted);
+
+    private static void AssertElement(Dish? actual, DishDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.DishName, Is.EqualTo(expected.DishName));
+            Assert.That(actual.DishType, Is.EqualTo(expected.DishType));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/PostStorageContractTests.cs

@@ -0,0 +1,263 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeDatabase.Implementations;
+using Microsoft.EntityFrameworkCore;
+using AndDietCokeDatabase.Models;
+using AndDietCokeTests.Infrastructure;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+[TestFixture]
+internal class PostStorageContractTests : BaseStorageContractTest
+{
+    private PostStorageContract _postStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _postStorageContract = new PostStorageContract(AndDietCokeDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemovePostsFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 2");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 3");
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == post.Id), post);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenHaveRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenNoRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        AssertElement(_postStorageContract.GetElementById(post.PostId), post);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordWasDeleted_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostId), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenTrySearchById_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementById(post.Id), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        AssertElement(_postStorageContract.GetElementByName(post.PostName), post);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenRecordWasDeleted_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostName), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        _postStorageContract.AddElement(post);
+        AssertElement(AndDietCokeDbContext.GetPostFromDatabaseByPostId(post.Id), post);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: post.PostName, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSamePostId_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        _postStorageContract.UpdElement(post);
+        var posts = AndDietCokeDbContext.GetPostsFromDatabaseByPostId(post.Id);
+        Assert.That(posts, Is.Not.Null);
+        Assert.That(posts, Has.Length.EqualTo(2));
+        AssertElement(posts[0], CreateModel(post.Id));
+        AssertElement(posts[^1], CreateModel(post.Id));
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "New Name");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(post.Id, postName: "name");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: post.PostName);
+        Assert.That(() => _postStorageContract.UpdElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenRecordWasDeleted_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: false);
+        Assert.That(() => _postStorageContract.UpdElement(post), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: true);
+        _postStorageContract.DelElement(post.PostId);
+        Assert.That(AndDietCokeDbContext.GetPostFromDatabaseByPostId(post.PostId), Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasDeleted_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.DelElement(post.PostId), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_ResElement_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        _postStorageContract.ResElement(post.PostId);
+        var element = AndDietCokeDbContext.GetPostFromDatabaseByPostId(post.PostId);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsActual);
+        });
+    }
+
+    [Test]
+    public void Try_ResElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.ResElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_ResElement_WhenRecordNotWasDeleted_Test()
+    {
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: true);
+        Assert.That(() => _postStorageContract.ResElement(post.PostId), Throws.Nothing);
+    }
+
+    private static void AssertElement(PostDataModel? actual, Post expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+        });
+    }
+
+    private static PostDataModel CreateModel(string postId, string postName = "test", PostType postType = PostType.Packer, double salary = 10, bool isActive = true, DateTime? changeDate = null)
+    {
+        return new(postId, postName, postType, salary, isActive, changeDate ?? DateTime.Now);
+    }
+
+    private static void AssertElement(Post? actual, PostDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.PostId, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/SalaryStorageContractTests.cs

@@ -0,0 +1,155 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AndDietCokeDatabase.Implementations;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+[TestFixture]
+internal class SalaryStorageContractTests : BaseStorageContractTest
+{
+    private SalaryStorageContract _salaryStorageContract;
+    private Worker _worker;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract = new SalaryStorageContract(AndDietCokeDbContext);
+        _worker = InsertWorkerToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Salaries\" CASCADE;");
+        AndDietCokeDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Workers\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var salary = InsertSalaryToDatabaseAndReturn(_worker.Id, workerSalary: 100);
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), salary);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyInDatePeriod_Test()
+    {
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByWorker_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(worker.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.WorkerId == _worker.Id));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByWorkerOnlyInDatePeriod_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.WorkerId == _worker.Id));
+        });
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var salary = CreateModel(_worker.Id);
+        _salaryStorageContract.AddElement(salary);
+        AssertElement(GetSalaryFromDatabaseByWorkerId(_worker.Id), salary);
+    }
+
+    private Worker InsertWorkerToDatabaseAndReturn(string workerFIO = "fio")
+    {
+        var worker = new Worker() { Id = Guid.NewGuid().ToString(), PostId = Guid.NewGuid().ToString(), FIO = workerFIO, IsDeleted = false };
+        AndDietCokeDbContext.Workers.Add(worker);
+        AndDietCokeDbContext.SaveChanges();
+        return worker;
+    }
+
+    private Salary InsertSalaryToDatabaseAndReturn(string workerId, double workerSalary = 1, DateTime? salaryDate = null)
+    {
+        var salary = new Salary() { WorkerId = workerId, WorkerSalary = workerSalary, SalaryDate = salaryDate ?? DateTime.UtcNow };
+        AndDietCokeDbContext.Salaries.Add(salary);
+        AndDietCokeDbContext.SaveChanges();
+        return salary;
+    }
+
+    private static void AssertElement(SalaryDataModel? actual, Salary expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.Salary, Is.EqualTo(expected.WorkerSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateModel(string workerId, double workerSalary = 1, DateTime? salaryDate = null)
+        => new(workerId, salaryDate ?? DateTime.UtcNow, workerSalary);
+
+    private Salary? GetSalaryFromDatabaseByWorkerId(string id) => AndDietCokeDbContext.Salaries.FirstOrDefault(x => x.WorkerId == id);
+
+    private static void AssertElement(Salary? actual, SalaryDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.WorkerSalary, Is.EqualTo(expected.Salary));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/SaleStorageContractTests.cs

@@ -0,0 +1,263 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using AndDietCokeDatabase.Implementations;
+using NUnit.Framework;
+using Microsoft.EntityFrameworkCore;
+using AndDietCokeContracts.Enums;
+using AndDietCokeTests.Infrastructure;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+[TestFixture]
+internal class SaleStorageContractTests : BaseStorageContractTest
+{
+    private SaleStorageContract _saletStorageContract;
+    private Buyer _buyer;
+    private Worker _worker;
+    private Dish _dish;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _saletStorageContract = new SaleStorageContract(AndDietCokeDbContext);
+        _buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        _worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        _dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveSalesFromDatabase();
+        AndDietCokeDbContext.RemoveWorkersFromDatabase();
+        AndDietCokeDbContext.RemoveBuyersFromDatabase();
+        AndDietCokeDbContext.RemoveDishesFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 5, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, dishes: [(_dish.Id, 10, 1.2)]);
+        var list = _saletStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _saletStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPeriod_Test()
+    {
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(3), dishes: [(_dish.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByWorkerId_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "Other worker");
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, null, dishes: [(_dish.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(workerId: _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.WorkerId == _worker.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByBuyerId_Test()
+    {
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(fio: "Other fio", phoneNumber: "+8-888-888-88-88");
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, dishes: [(_dish.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(buyerId: _buyer.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.BuyerId == _buyer.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByDishId_Test()
+    {
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn( dishName: "Other name");
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 5, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2), (dish.Id, 4, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, dishes: [(dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, null, dishes: [(dish.Id, 1, 1.2), (_dish.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(dishId: _dish.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        Assert.That(list.All(x => x.Dishes!.Any(y => y.DishId == _dish.Id)));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "Other worker");
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(fio: "Other fio", phoneNumber: "+8-888-888-88-88");
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "Other name");
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, null, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), dishes: [(dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, buyer.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), dishes: [(_dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), dishes: [(dish.Id, 1, 1.2)]);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), dishes: [(_dish.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1), workerId: _worker.Id, buyerId: _buyer.Id, dishId: dish.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        AssertElement(_saletStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)]);
+        Assert.That(() => _saletStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordHasCanceled_Test()
+    {
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)], isCancel: true);
+        AssertElement(_saletStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _worker.Id, _buyer.Id, 0, true, false, [_dish.Id]);
+        _saletStorageContract.AddElement(sale);
+        AssertElement(AndDietCokeDbContext.GetSaleFromDatabaseById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenIsDeletedIsTrue_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _worker.Id, _buyer.Id, 0, true, true, [_dish.Id]);
+        Assert.That(() => _saletStorageContract.AddElement(sale), Throws.Nothing);
+        AssertElement(AndDietCokeDbContext.GetSaleFromDatabaseById(sale.Id), CreateModel(sale.Id, _worker.Id, _buyer.Id, 0, true, false, [_dish.Id]));
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)], isCancel: false);
+        _saletStorageContract.DelElement(sale.Id);
+        var element = AndDietCokeDbContext.GetSaleFromDatabaseById(sale.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsCancel);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _saletStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasCanceled_Test()
+    {
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(_worker.Id, _buyer.Id, dishes: [(_dish.Id, 1, 1.2)], isCancel: true);
+        Assert.That(() => _saletStorageContract.DelElement(sale.Id), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    private static void AssertElement(SaleDataModel? actual, Sale expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.BuyerId, Is.EqualTo(expected.BuyerId));
+            Assert.That(actual.Sum, Is.EqualTo(expected.Sum));
+            Assert.That(actual.IsConstantClient, Is.EqualTo(expected.IsConstantClient));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.OrderDishes is not null)
+        {
+            Assert.That(actual.Dishes, Is.Not.Null);
+            Assert.That(actual.Dishes, Has.Count.EqualTo(expected.OrderDishes.Count));
+            for (int i = 0; i < actual.Dishes.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Dishes[i].DishId, Is.EqualTo(expected.OrderDishes[i].DishId));
+                    Assert.That(actual.Dishes[i].Count, Is.EqualTo(expected.OrderDishes[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Dishes, Is.Null);
+        }
+    }
+
+    private static SaleDataModel CreateModel(string id, string workerId, string? buyerId, double sum, bool isConstantClient, bool isCancel, List<string> dishIds)
+    {
+        var dishes = dishIds.Select(x => new OrderDishDataModel(id, x, 1, 1.1)).ToList();
+        return new(id, workerId, buyerId, isConstantClient, isCancel, dishes);
+    }
+
+    private static void AssertElement(Sale? actual, SaleDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.BuyerId, Is.EqualTo(expected.BuyerId));
+            Assert.That(actual.Sum, Is.EqualTo(expected.Sum));
+            Assert.That(actual.IsConstantClient, Is.EqualTo(expected.IsConstantClient));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.Dishes is not null)
+        {
+            Assert.That(actual.OrderDishes, Is.Not.Null);
+            Assert.That(actual.OrderDishes, Has.Count.EqualTo(expected.Dishes.Count));
+            for (int i = 0; i < actual.OrderDishes.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.OrderDishes[i].DishId, Is.EqualTo(expected.Dishes[i].DishId));
+                    Assert.That(actual.OrderDishes[i].Count, Is.EqualTo(expected.Dishes[i].Count));
+                    Assert.That(actual.OrderDishes[i].Price, Is.EqualTo(expected.Dishes[i].Price));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.OrderDishes, Is.Null);
+        }
+    }
+}

AndDietCokeProject/AndDietCokeTests/StoragesContracts/WorkerStorageContractTests.cs

@@ -0,0 +1,224 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeDatabase.Implementations;
+using AndDietCokeContracts.StoragesContracts;
+using AndDietCokeDatabase.Models;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using AndDietCokeTests.Infrastructure;
+
+namespace AndDietCokeTests.StoragesContracts;
+
+
+[TestFixture]
+internal class WorkerStorageContractTests : BaseStorageContractTest
+{
+    private WorkerStorageContract _workerStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _workerStorageContract = new WorkerStorageContract(AndDietCokeDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveWorkersFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 1");
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 2");
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 3");
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.FIO == worker.FIO), worker);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPostId_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 1", postId: postId);
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 2", postId: postId);
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 3");
+        var list = _workerStorageContract.GetList(postId: postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.PostId == postId));
+    }
+
+    [Test]
+    public void Try_GetList_ByBirthDate_Test()
+    {
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 1", birthDate: DateTime.UtcNow.AddYears(-25));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 2", birthDate: DateTime.UtcNow.AddYears(-21));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 3", birthDate: DateTime.UtcNow.AddYears(-20));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 4", birthDate: DateTime.UtcNow.AddYears(-19));
+        var list = _workerStorageContract.GetList(fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByEmploymentDate_Test()
+    {
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 1", employmentDate: DateTime.UtcNow.AddDays(-2));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 2", employmentDate: DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 3", employmentDate: DateTime.UtcNow.AddDays(1));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 4", employmentDate: DateTime.UtcNow.AddDays(2));
+        var list = _workerStorageContract.GetList(fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 1", postId: postId, birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 2", postId: postId, birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 3", postId: postId, birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(fio: "fio 4", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
+        var list = _workerStorageContract.GetList(postId: postId, fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1), fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        AssertElement(_workerStorageContract.GetElementById(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        AssertElement(_workerStorageContract.GetElementByFIO(worker.FIO), worker);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        _workerStorageContract.AddElement(worker);
+        AssertElement(AndDietCokeDbContext.GetWorkerFromDatabaseById(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(worker.Id);
+        Assert.That(() => _workerStorageContract.AddElement(worker), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString(), "New Fio");
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(worker.Id);
+        _workerStorageContract.UpdElement(worker);
+        AssertElement(AndDietCokeDbContext.GetWorkerFromDatabaseById(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(worker.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.UpdElement(worker), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _workerStorageContract.DelElement(worker.Id);
+        var element = AndDietCokeDbContext.GetWorkerFromDatabaseById(worker.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.IsDeleted);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(worker.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.DelElement(worker.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private static void AssertElement(WorkerDataModel? actual, Worker expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static WorkerDataModel CreateModel(string id, string fio = "fio", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false) =>
+        new(id, fio, postId ?? Guid.NewGuid().ToString(), birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow, isDeleted);
+
+    private static void AssertElement(Worker? actual, WorkerDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/WebApiControllersTests/BaseWebApiControllerTest.cs

@@ -0,0 +1,68 @@
+using AndDietCokeDatabase;
+using AndDietCokeTests.Infrastructure;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Serilog;
+using System.Text;
+using System.Text.Json;
+
+namespace AndDietCokeTests.WebApiControllersTests;
+
+internal class BaseWebApiControllerTest
+{
+    private WebApplicationFactory<Program> _webApplication;
+
+    protected HttpClient HttpClient { get; private set; }
+
+    protected AndDietCokeDbContext AndDietCokeDbContext { get; private set; }
+
+    protected static readonly JsonSerializerOptions JsonSerializerOptions = new() { PropertyNameCaseInsensitive = true };
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _webApplication = new CustomWebApplicationFactory<Program>();
+        HttpClient = _webApplication
+            .WithWebHostBuilder(builder =>
+            {
+                builder.ConfigureTestServices(services =>
+                {
+                    using var loggerFactory = new LoggerFactory();
+                    loggerFactory.AddSerilog(new LoggerConfiguration()
+                        .ReadFrom.Configuration(new ConfigurationBuilder()
+                            .SetBasePath(Directory.GetCurrentDirectory())
+                            .AddJsonFile("appsettings.json")
+                            .Build())
+                        .CreateLogger());
+                    services.AddSingleton(loggerFactory);
+                });
+            })
+            .CreateClient();
+
+        var request = HttpClient.GetAsync("/login/user").GetAwaiter().GetResult();
+        var data = request.Content.ReadAsStringAsync().GetAwaiter().GetResult();
+        HttpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {data}");
+
+        AndDietCokeDbContext = _webApplication.Services.GetRequiredService<AndDietCokeDbContext>();
+        AndDietCokeDbContext.Database.EnsureDeleted();
+        AndDietCokeDbContext.Database.EnsureCreated();
+    }
+
+    [OneTimeTearDown]
+    public void OneTimeTearDown()
+    {
+        AndDietCokeDbContext?.Database.EnsureDeleted();
+        AndDietCokeDbContext?.Dispose();
+        HttpClient?.Dispose();
+        _webApplication?.Dispose();
+    }
+
+    protected static async Task<T?> GetModelFromResponseAsync<T>(HttpResponseMessage response) =>
+        JsonSerializer.Deserialize<T>(await response.Content.ReadAsStringAsync(), JsonSerializerOptions);
+
+    protected static StringContent MakeContent(object model) =>
+        new(JsonSerializer.Serialize(model), Encoding.UTF8, "application/json");
+}

AndDietCokeProject/AndDietCokeTests/WebApiControllersTests/BuyerControllerTests.cs

@@ -0,0 +1,374 @@
+using AndDietCokeContracts.BindingModels;
+using AndDietCokeContracts.ViewModels;
+using AndDietCokeDatabase.Models;
+using AndDietCokeTests.Infrastructure;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.WebApiControllersTests;
+
+[TestFixture]
+internal class BuyerControllerTests : BaseWebApiControllerTest
+{
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveSalesFromDatabase();
+        AndDietCokeDbContext.RemoveWorkersFromDatabase();
+        AndDietCokeDbContext.RemoveBuyersFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+5-555-555-55-55");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+6-666-666-66-66");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: "+7-777-777-77-77");
+        //Act
+        var response = await HttpClient.GetAsync("/api/buyers");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<BuyerViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == buyer.Id), buyer);
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync("/api/buyers");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<BuyerViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/{buyer.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<BuyerViewModel>(response), buyer);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/{buyer.FIO}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<BuyerViewModel>(response), buyer);
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/New%20Fio");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByPhoneNumber_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/{buyer.PhoneNumber}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<BuyerViewModel>(response), buyer);
+    }
+
+    [Test]
+    public async Task GetElement_ByPhoneNumber_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/buyers/+8-888-888-88-88");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        var buyerModel = CreateBindingModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(AndDietCokeDbContext.GetBuyerFromDatabase(buyerModel.Id!), buyerModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModel = CreateBindingModel();
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyerModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSamePhoneNumber_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModel = CreateBindingModel();
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: buyerModel.PhoneNumber!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModelWithIdIncorrect = new BuyerBindingModel { Id = "Id", FIO = "fio", PhoneNumber = "+7-111-111-11-11" };
+        var buyerModelWithFioIncorrect = new BuyerBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, PhoneNumber = "+7-111-111-11-11"};
+        var buyerModelWithPhoneNumberIncorrect = new BuyerBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", PhoneNumber = "+7-111-111-11-11"};
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModelWithFioIncorrect));
+        var responseWithPhoneNumberIncorrect = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModelWithPhoneNumberIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithPhoneNumberIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PhoneNumber is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyerModel = CreateBindingModel(fio: "new fio");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyerModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AndDietCokeDbContext.ChangeTracker.Clear();
+        AssertElement(AndDietCokeDbContext.GetBuyerFromDatabase(buyerModel.Id!), buyerModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModel = CreateBindingModel(fio: "new fio");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSamePhoneNumber_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModel = CreateBindingModel(fio: "new fio");
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyerModel.Id);
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(phoneNumber: buyerModel.PhoneNumber!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/buyers", MakeContent(buyerModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var buyerModelWithIdIncorrect = new BuyerBindingModel { Id = "Id", FIO = "fio", PhoneNumber = "+7-111-111-11-11"};
+        var buyerModelWithFioIncorrect = new BuyerBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, PhoneNumber = "+7-111-111-11-11"};
+        var buyerModelWithPhoneNumberIncorrect = new BuyerBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", PhoneNumber = "+7-111-111-11-11"};
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/buyers", MakeContent(buyerModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PutAsync($"/api/buyers", MakeContent(buyerModelWithFioIncorrect));
+        var responseWithPhoneNumberIncorrect = await HttpClient.PutAsync($"/api/buyers", MakeContent(buyerModelWithPhoneNumberIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithPhoneNumberIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PhoneNumber is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/buyers", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/buyers", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyerId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn(buyerId);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/buyers/{buyerId}");
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(AndDietCokeDbContext.GetBuyerFromDatabase(buyerId), Is.Null);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenHaveSalesByThisBuyer_ShouldSuccess_Test()
+    {
+        //Arrange
+        var buyer = AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, buyer.Id);
+        AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id, buyer.Id);
+        var salesBeforeDelete = AndDietCokeDbContext.GetSalesByBuyerId(buyer.Id);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/buyers/{buyer.Id}");
+        //Assert
+        AndDietCokeDbContext.ChangeTracker.Clear();
+        var element = AndDietCokeDbContext.GetBuyerFromDatabase(buyer.Id);
+        var salesAfterDelete = AndDietCokeDbContext.GetSalesByBuyerId(buyer.Id);
+        var salesNoBuyers = AndDietCokeDbContext.GetSalesByBuyerId(null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(element, Is.Null);
+            Assert.That(salesBeforeDelete, Has.Length.EqualTo(2));
+            Assert.That(salesAfterDelete, Is.Empty);
+            Assert.That(salesNoBuyers, Has.Length.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertBuyerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/buyers/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/buyers/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(BuyerViewModel? actual, Buyer expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+            Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+        });
+    }
+
+    private static BuyerBindingModel CreateBindingModel(string? id = null, string fio = "fio", string phoneNumber = "+7-666-666-66-66", double discountSize = 10) =>
+        new()
+        {
+            Id = id ?? Guid.NewGuid().ToString(),
+            FIO = fio,
+            PhoneNumber = phoneNumber
+        };
+
+    private static void AssertElement(Buyer? actual, BuyerBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+        });
+    }
+}

AndDietCokeProject/AndDietCokeTests/WebApiControllersTests/DishControllerTests.cs

@@ -0,0 +1,483 @@
+using AndDietCokeContracts.BindingModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.ViewModels;
+using AndDietCokeDatabase.Models;
+using AndDietCokeTests.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.WebApiControllersTests;
+
+[TestFixture]
+internal class DishControllerTests : BaseWebApiControllerTest
+{
+
+    [SetUp]
+    public void SetUp()
+    {
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemoveDishesFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3");
+        //Act
+        var response = await HttpClient.GetAsync("/api/dishes/getrecords?includeDeleted=false");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == dish.Id), dish);
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync("/api/dishes/getrecords?includeDeleted=false");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetList_OnlyActual_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2", isDeleted: false);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3", isDeleted: false);
+        //Act
+        var response = await HttpClient.GetAsync("/api/dishes/getrecords?includeDeleted=false");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+            Assert.That(data.All(x => !x.IsDeleted));
+        });
+    }
+
+    [Test]
+    public async Task GetList_IncludeNoActual_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 1", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 2", isDeleted: true);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: "name 3", isDeleted: false);
+        //Act
+        var response = await HttpClient.GetAsync("/api/dishes/getrecords?includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(3));
+            Assert.That(data.Any(x => x.IsDeleted));
+            Assert.That(data.Any(x => !x.IsDeleted));
+        });
+    }
+
+
+    [Test]
+    public async Task GetHistoryByDishId_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 20, DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        var history = AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 40, DateTime.UtcNow.AddDays(1));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/gethistory?id={dish.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishHistoryViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.That(data, Has.Count.EqualTo(3));
+        AssertElement(data[0], history);
+    }
+
+    [Test]
+    public async Task GetHistoryByDishId_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 20, DateTime.UtcNow.AddDays(-1));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        AndDietCokeDbContext.InsertDishHistoryToDatabaseAndReturn(dish.Id, 40, DateTime.UtcNow.AddDays(1));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/gethistory?id={Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<DishViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.That(data, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public async Task GetHistoryByDishId_WhenDishIdIsNotGuid_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/gethistory?id=id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/{dish.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<DishViewModel>(response), dish);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/{dish.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/{dish.DishName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<DishViewModel>(response), dish);
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/New%20Name");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var dish = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/dishes/getrecord/{dish.DishName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        var dishModel = CreateModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dishModel.Id!), dishModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel();
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel(dishName: "unique name");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dishModel.DishName!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModelWithIdIncorrect = new DishBindingModel { Id = "Id",Price = 100, DishType = DishType.Dessert.ToString() };
+        var dishModelWithNameIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(),Price = 100, DishType = DishType.Dessert.ToString() };
+        var dishModelWithDishTypeIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(), Price = 100, DishType = string.Empty };
+        var dishModelWithPriceIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(), Price = 0, DishType = DishType.Dessert.ToString() };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModelWithNameIncorrect));
+        var responseWithDishTypeIncorrect = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModelWithDishTypeIncorrect));
+        var responseWithPriceIncorrect = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(dishModelWithPriceIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithDishTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPriceIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/dishes/register", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel();
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AndDietCokeDbContext.ChangeTracker.Clear();
+        AssertElement(AndDietCokeDbContext.GetDishFromDatabaseById(dishModel.Id!), dishModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel();
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel(dishName: "unique name");
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishModel.Id);
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishName: dishModel.DishName!);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModel = CreateModel();
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishModel.Id, isDeleted: true);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishModelWithIdIncorrect = new DishBindingModel { Id = "Id", Price = 100, DishType = DishType.Dessert.ToString() };
+        var dishModelWithNameIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(), Price = 100, DishType = DishType.Dessert.ToString() };
+        var dishModelWithDishTypeIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(), Price = 100, DishType = string.Empty };
+        var dishModelWithPriceIncorrect = new DishBindingModel { Id = Guid.NewGuid().ToString(), Price = 0, DishType = DishType.Dessert.ToString() };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModelWithNameIncorrect));
+        var responseWithDishTypeIncorrect = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModelWithDishTypeIncorrect));
+        var responseWithPriceIncorrect = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(dishModelWithPriceIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithDishTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPriceIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/dishes/changeinfo", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var dishId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn(dishId);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/dishes/delete/{dishId}");
+        AndDietCokeDbContext.ChangeTracker.Clear();
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(AndDietCokeDbContext.GetDishFromDatabaseById(dishId)!.IsDeleted);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertDishToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/dishes/delete/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var dishId = AndDietCokeDbContext.InsertDishToDatabaseAndReturn(isDeleted: true).Id;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/dishes/delete/{dishId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/dishes/delete/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(DishViewModel? actual, Dish expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.DishName, Is.EqualTo(expected.DishName));
+            Assert.That(actual.DishType, Is.EqualTo(expected.DishType.ToString()));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static void AssertElement(DishHistoryViewModel? actual, DishHistory expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.DishName, Is.EqualTo(expected.Dish!.DishName));
+            Assert.That(actual.OldPrice, Is.EqualTo(expected.OldPrice));
+            Assert.That(actual.ChangeDate.ToString(), Is.EqualTo(expected.ChangeDate.ToString()));
+        });
+    }
+
+    private static DishBindingModel CreateModel(string? id = null, string dishName = "name", DishType dishType = DishType.Base, double price = 1)
+        => new()
+        {
+            Id = id ?? Guid.NewGuid().ToString(),
+            DishName = dishName,
+            DishType = dishType.ToString(),
+            Price = price
+        };
+
+    private static void AssertElement(Dish? actual, DishBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.DishName, Is.EqualTo(expected.DishName));
+            Assert.That(actual.DishType.ToString(), Is.EqualTo(expected.DishType));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+            Assert.That(!actual.IsDeleted);
+        });
+    }
+}
+

AndDietCokeProject/AndDietCokeTests/WebApiControllersTests/PostControllerTests.cs

@@ -0,0 +1,461 @@
+using AndDietCokeContracts.BindingModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.ViewModels;
+using AndDietCokeDatabase.Models;
+using AndDietCokeTests.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.WebApiControllersTests;
+
+[TestFixture]
+internal class PostControllerTests : BaseWebApiControllerTest
+{
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemovePostsFromDatabase();
+    }
+
+    [Test]
+    public async Task GetRecords_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 2");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 3");
+        //Act
+        var response = await HttpClient.GetAsync("/api/posts");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public async Task GetHistory_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/{postId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(2));
+        });
+        AssertElement(data.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public async Task GetHistory_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetHistory_WhenWrongData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<PostViewModel>(response), post);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<PostViewModel>(response), post);
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/New%20Name");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        var postModel = CreateModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(AndDietCokeDbContext.GetPostFromDatabaseByPostId(postModel.Id!), postModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel(postName: "unique name");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: postModel.PostName!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModelWithIdIncorrect = new PostBindingModel { Id = "Id", PostName = "name", PostType = PostType.Packer.ToString(), Salary = 10 };
+        var postModelWithNameIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Packer.ToString(), Salary = 10 };
+        var postModelWithPostTypeIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = string.Empty, Salary = 10 };
+        var postModelWithSalaryIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Packer.ToString(), Salary = -10 };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithNameIncorrect));
+        var responseWithPostTypeIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithPostTypeIncorrect));
+        var responseWithSalaryIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithSalaryIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPostTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Type is incorrect");
+            Assert.That(responseWithSalaryIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Salary is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AndDietCokeDbContext.ChangeTracker.Clear();
+        AssertElement(AndDietCokeDbContext.GetPostFromDatabaseByPostId(postModel.Id!), postModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postModel.Id, isActual: false);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel(postName: "unique name");
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn(postName: postModel.PostName!);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModelWithIdIncorrect = new PostBindingModel { Id = "Id", PostName = "name", PostType = PostType.Packer.ToString(), Salary = 10 };
+        var postModelWithNameIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Packer.ToString(), Salary = 10 };
+        var postModelWithPostTypeIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = string.Empty, Salary = 10 };
+        var postModelWithSalaryIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Packer.ToString(), Salary = -10 };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithNameIncorrect));
+        var responseWithPostTypeIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithPostTypeIncorrect));
+        var responseWithSalaryIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithSalaryIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPostTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Type is incorrect");
+            Assert.That(responseWithSalaryIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Salary is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = AndDietCokeDbContext.InsertPostToDatabaseAndReturn().PostId;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{postId}");
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(AndDietCokeDbContext.GetPostFromDatabaseByPostId(postId), Is.Null);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenRecordWasDeleted_Test()
+    {
+        //Arrange
+        var postId = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false).PostId;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{postId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Patch_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(isActual: false).PostId;
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{postId}", null);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(AndDietCokeDbContext.GetPostFromDatabaseByPostId(postId), Is.Not.Null);
+        });
+    }
+
+    [Test]
+    public async Task Patch_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{Guid.NewGuid()}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Patch_WhenRecordNotWasDeleted_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = AndDietCokeDbContext.InsertPostToDatabaseAndReturn().PostId;
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{postId}", null);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(AndDietCokeDbContext.GetPostFromDatabaseByPostId(postId), Is.Not.Null);
+        });
+    }
+
+    [Test]
+    public async Task Patch_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/id", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(PostViewModel? actual, Post expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.PostId));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType.ToString()));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+        });
+    }
+
+    private static PostBindingModel CreateModel(string? postId = null, string postName = "name", PostType postType = PostType.Packer, double salary = 10)
+        => new()
+        {
+            Id = postId ?? Guid.NewGuid().ToString(),
+            PostName = postName,
+            PostType = postType.ToString(),
+            Salary = salary
+        };
+
+    private static void AssertElement(Post? actual, PostBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.PostId, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType.ToString(), Is.EqualTo(expected.PostType));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+        });
+    }
+
+}

AndDietCokeProject/AndDietCokeTests/WebApiControllersTests/SalaryControllerTests.cs

@@ -0,0 +1,220 @@
+using AndDietCokeContracts.ViewModels;
+using AndDietCokeTests.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.WebApiControllersTests;
+
+[TestFixture]
+internal class SalaryControllerTests : BaseWebApiControllerTest
+{
+    [TearDown]
+    public void TearDown()
+    {
+        AndDietCokeDbContext.RemovePostsFromDatabase();
+        AndDietCokeDbContext.RemoveSalesFromDatabase();
+        AndDietCokeDbContext.RemoveSalariesFromDatabase();
+        AndDietCokeDbContext.RemoveWorkersFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        var salary = AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id, workerSalary: 100);
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id);
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecords?fromDate={DateTime.UtcNow.AddDays(-10):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(10):MM/dd/yyyy HH:mm:ss}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<SalaryViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecords?fromDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<SalaryViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetList_OnlyForCertainPeriod_ShouldSuccess_Test()
+    {
+        //Arrange
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecords?fromDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<SalaryViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public async Task GetList_WhenDatesAreIncorrect_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecords?fromDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetList_ByWorker_ShouldSuccess_Test()
+    {
+        //Arrange
+        var worker1 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("fio","+7(555)555-55-55");
+        var worker2 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("new fio", "+7(333)333-33-33");
+
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id);
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id);
+
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker2.Id);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecordsbyworker?fromDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}&workerId={worker1.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<SalaryViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+            Assert.That(data.All(x => x.WorkerId == worker1.Id));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByWorker_OnlyForCertainPeriod_ShouldSuccess_Test()
+    {
+        //Arrange
+        var worker1 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("fio", "+7(555)555-55-55");
+        var worker2 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("new fio", "+7(333)333-33-33");
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker2.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker2.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        AndDietCokeDbContext.InsertSalaryToDatabaseAndReturn(worker1.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecordsbyworker?fromDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}&workerId={worker1.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<SalaryViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+            Assert.That(data.All(x => x.WorkerId == worker1.Id));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByWorker_WhenDatesAreIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecordsbyworker?fromDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&workerId={worker.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetList_ByWorker_WhenIdIsNotGuid_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/salary/getrecordsbyworker?fromDate={DateTime.UtcNow.AddDays(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1):MM/dd/yyyy HH:mm:ss}&workerId=id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Calculate_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(salary: 1000);
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(postId: post.PostId);
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id);
+
+        var expectedSum = sale.Sum * 0.1 + post.Salary;
+        //Act
+        var response = await HttpClient.PostAsync($"/api/salary/calculate?date={DateTime.UtcNow:MM/dd/yyyy}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        var salaries = AndDietCokeDbContext.GetSalariesFromDatabaseByWorkerId(worker.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(salaries, Has.Length.EqualTo(1));
+            Assert.That(salaries.First().WorkerSalary, Is.EqualTo(expectedSum));
+            Assert.That(salaries.First().SalaryDate.Month, Is.EqualTo(DateTime.UtcNow.Month));
+        });
+    }
+
+    [Test]
+    public async Task Calculate_WhenAllWorkersWithoutSales_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/salary/calculate?date={DateTime.UtcNow:MM/dd/yyyy}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        var salaries = AndDietCokeDbContext.Salaries.ToArray();
+        Assert.That(salaries, Has.Length.EqualTo(0));
+    }
+
+    [Test]
+    public async Task Calculate_WhenWorkerWithoutSales_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = AndDietCokeDbContext.InsertPostToDatabaseAndReturn(salary: 1000);
+        var worker1 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("fio 1", post.PostId,"+7(555)555-55-55");
+        var worker2 = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn("fio 2", post.PostId, "+7(333)333-33-33");
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker1.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/salary/calculate?date={DateTime.UtcNow:MM/dd/yyyy}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        var salary1 = AndDietCokeDbContext.GetSalariesFromDatabaseByWorkerId(worker1.Id).First().WorkerSalary;
+        var salary2 = AndDietCokeDbContext.GetSalariesFromDatabaseByWorkerId(worker2.Id).First().WorkerSalary;
+        Assert.That(salary1, Is.Not.EqualTo(salary2));
+    }
+
+    [Test]
+    public async Task Calculate_WhenWorkerWithoutPost_ShouldSuccess_Test()
+    {
+        //Arrange
+        AndDietCokeDbContext.InsertPostToDatabaseAndReturn();
+        var worker = AndDietCokeDbContext.InsertWorkerToDatabaseAndReturn(postId: Guid.NewGuid().ToString());
+        var sale = AndDietCokeDbContext.InsertSaleToDatabaseAndReturn(worker.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/salary/calculate?date={DateTime.UtcNow:MM/dd/yyyy}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+}