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PuferFishContracts/PuferFishBusinessLogic/Implementations/BuyerBusinessLogicContract.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.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);
+        }
+    }
+}

PuferFishContracts/PuferFishBusinessLogic/Implementations/PointsBusinessLogicContract.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.Implementations;
+
+internal class PointsBusinessLogicContract(IPointsStorageContract pointsStorageContract, ISaleStorageContract saleStorageContract, IBuyerStorageContract buyerStorageContract, ILogger logger) : IPointsBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPointsStorageContract _pointsStorageContract = pointsStorageContract;
+    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IBuyerStorageContract _buyerStorageContract = buyerStorageContract;
+
+    public List<PointsDataModel> GetAllPointsByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}",
+        fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _pointsStorageContract.GetList(fromDate, toDate) ?? throw new
+        NullListException();
+    }
+    public List<PointsDataModel> GetAllPointsByPeriodByBuyer(DateTime fromDate, DateTime toDate, string buyerId)
+    {
+        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.");
+        }
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, { buyerId}", fromDate, toDate, buyerId);
+        return _pointsStorageContract.GetList(fromDate, toDate, buyerId) ??
+        throw new NullListException();
+    }
+    public void CalculatePointsByMounth(DateTime date)
+    {
+        _logger.LogInformation("CalculatePointsByMonth: {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 buyers = _buyerStorageContract.GetList() ?? throw new NullListException();
+
+        foreach (var buyer in buyers)
+        {
+            var points = buyer.Points;
+
+            _logger.LogDebug("The buyer {buyerId} was awarded {points} points", buyer.Id, points);
+
+            _pointsStorageContract.AddElement(new PointsDataModel(buyer.Id, finishDate, points));
+        }
+    }
+}

PuferFishContracts/PuferFishBusinessLogic/Implementations/PostBusinessLogicContract.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.Implementations;
+
+internal 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);
+    }
+}

PuferFishContracts/PuferFishBusinessLogic/Implementations/ProductBusinessLogicContract.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.Implementations;
+
+internal class ProductBusinessLogicContract(IProductStorageContract productStorageContract, ILogger logger) : IProductBusinessLogicContract
+{
+    private readonly ILogger _logger = logger;
+    private readonly IProductStorageContract _productStorageContract = productStorageContract;
+     
+    public List<ProductDataModel> GetAllProducts(bool onlyActive)
+    {
+        _logger.LogInformation("GetAllProducts params: {onlyActive}", onlyActive);
+        return _productStorageContract.GetList(onlyActive) ?? throw new NullListException();
+    }
+    public List<ProductHistoryDataModel> GetProductHistoryByProduct(string
+    productId)
+    {
+        _logger.LogInformation("GetProductHistoryByProduct for {productId}",
+        productId);
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+            }
+        return _productStorageContract.GetHistoryByProductId(productId) ??
+        throw new NullListException();
+    }
+    public ProductDataModel GetProductByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _productStorageContract.GetElementById(data) ?? throw
+            new ElementNotFoundException(data);
+        }
+        return _productStorageContract.GetElementByName(data) ?? throw new
+        ElementNotFoundException(data);
+    }
+    public void InsertProduct(ProductDataModel productDataModel)
+    {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.AddElement(productDataModel);
+    }
+    public void UpdateProduct(ProductDataModel productDataModel)
+    {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.UpdElement(productDataModel);
+    }
+    public void DeleteProduct(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");
+        }
+        _productStorageContract.DelElement(id);
+    }
+}

PuferFishContracts/PuferFishBusinessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -0,0 +1,125 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.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> GetAllSalesByProductByPeriod(string productId,
+    DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSales params: {productId}, {fromDate}, { toDate}", productId, fromDate, toDate);
+    if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, productId:
+        productId) ?? 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);
+    }
+}

PuferFishContracts/PuferFishBusinessLogic/Implementations/WorkerBusinessLogicContract.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishBusinessLogic.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);
+    }
+}
+   

PuferFishContracts/PuferFishBusinessLogic/PuferFishBusinessLogic.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="PuferFishTests" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+
+	<ItemGroup>
+	  <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+	</ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PuferFishContracts\PuferFishContracts.csproj" />
+  </ItemGroup>
+
+</Project>

PuferFishContracts/PuferFishContracts.sln

@@ -1,10 +1,14 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.12.35707.178 d17.12
+VisualStudioVersion = 17.12.35707.178
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PuferFishContracts", "PuferFishContracts\PuferFishContracts.csproj", "{4D964053-55A4-4522-BF52-984A22880D24}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PuferFishTests", "PuferFishTests\PuferFishTests.csproj", "{6A249C1E-4321-4506-841B-2BCE80F550A5}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PuferFishBusinessLogic", "PuferFishBusinessLogic\PuferFishBusinessLogic.csproj", "{6997CEC9-5AB7-40C0-9873-E51D2674187B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +19,14 @@ Global
 		{4D964053-55A4-4522-BF52-984A22880D24}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4D964053-55A4-4522-BF52-984A22880D24}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4D964053-55A4-4522-BF52-984A22880D24}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6997CEC9-5AB7-40C0-9873-E51D2674187B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6997CEC9-5AB7-40C0-9873-E51D2674187B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6997CEC9-5AB7-40C0-9873-E51D2674187B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6997CEC9-5AB7-40C0-9873-E51D2674187B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/IBuyerBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+public interface IBuyerBusinessLogicContract
+{
+    List<BuyerDataModel> GetAllBuyers();
+    BuyerDataModel GetBuyerByData(string data);
+    void InsertBuyer(BuyerDataModel buyerDataModel);
+    void UpdateBuyer(BuyerDataModel buyerDataModel);
+    void DeleteBuyer(string id);
+}

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/IPointsBusinessLogicContract.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+public interface IPointsBusinessLogicContract
+{
+    List<PointsDataModel> GetAllPointsByPeriod(DateTime fromDate, DateTime toDate);
+    List<PointsDataModel> GetAllPointsByPeriodByBuyer(DateTime fromDate, DateTime toDate, string buyerId);
+    void CalculatePointsByMounth(DateTime date);
+}

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/IPostBusinessLogicContract.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+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);
+}

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/IProductBusinessLogicContract.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+public interface IProductBusinessLogicContract
+{
+    List<ProductDataModel> GetAllProducts(bool onlyActive = true);
+    List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId);
+    ProductDataModel GetProductByData(string data);
+    void InsertProduct(ProductDataModel productDataModel);
+    void UpdateProduct(ProductDataModel productDataModel);
+    void DeleteProduct(string id);
+}

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/ISaleBusinessLogicContract.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+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> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate);
+    SaleDataModel GetSaleByData(string data);
+    void InsertSale(SaleDataModel saleDataModel);
+    void CancelSale(string id);
+}

PuferFishContracts/PuferFishContracts/BusinessLogicsContracts/IWorkerBusinessLogicContract.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.BusinessLogicsContracts;
+
+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);
+}

PuferFishContracts/PuferFishContracts/DataModels/BuyerDataModel.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels
+{
+    public class BuyerDataModel(string id, string fio, string phoneNumber, double points) : IValidation
+    {
+        public string Id { get; private set; } = id;
+        public string FIO { get; private set; } = fio;
+        public string PhoneNumber { get; private set; } = phoneNumber;
+        public double Points { get; private set; } = points;
+
+        public void Validate()
+        {
+            if (Id.IsEmpty())
+                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 (FIO.IsEmpty())
+                throw new ValidationException("Field FIO is empty");
+
+            if (!Regex.IsMatch(FIO, @"\b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b"))
+                throw new ValidationException("Field FIO is not a FIO");
+
+            if (PhoneNumber.IsEmpty())
+                throw new ValidationException("Field PhoneNumber is empty");
+
+            if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+                throw new ValidationException("Field PhoneNumber is not a phone number");
+            if (Points < 0)
+                throw new ValidationException("The value in the field Points is a negative number");
+        }
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/PointsDataModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishContracts.DataModels;
+
+public class PointsDataModel(string buyerId, DateTime pointsDate, double buyerPoints) : IValidation
+{
+    public string BuyerId { get; private set; } = buyerId;
+    public DateTime PointsDate { get; private set; } = pointsDate;
+    public double Points { get; private set; } = buyerPoints;
+    public void Validate()
+    {
+        if (BuyerId.IsEmpty())
+            throw new ValidationException("Field BuyerId is empty");
+        if (!BuyerId.IsGuid())
+            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+        if (Points <= 0)
+            throw new ValidationException("Field Points is less than or equal to 0");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+using System.Xml;
+
+namespace PuferFishContracts.DataModels
+{
+    public class PostDataModel(string id, string postName, PostType postType, bool isActual, DateTime changeDate) : IValidation
+    {
+        public string Id { get; private set; } = id;
+        public string PostName { get; private set; } = postName;
+        public PostType PostType { get; private set; } = postType;
+        public bool IsActual { get; private set; } = isActual;
+        public DateTime ChangeDate { get; private set; } = changeDate;
+        public void Validate()
+        {
+            if (Id.IsEmpty())
+                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 (PostName.IsEmpty())
+                throw new ValidationException("Field PostName is empty");
+            if (PostType == PostType.None)
+                throw new ValidationException("Field PostType is empty");
+        }
+
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ProductDataModel.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class ProductDataModel(string id, string productName, ProductType productType, double price, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string ProductName { get; private set; } = productName;
+    public ProductType ProductType { get; private set; } = productType;
+    public double Price { get; private set; } = price;
+    public bool IsDeleted { get; private set; } = isDeleted;
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            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 (ProductName.IsEmpty())
+            throw new ValidationException("Field ProductName is empty");
+        if (ProductType == ProductType.None)
+            throw new ValidationException("Field ProductType is empty");
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ProductHistoryDataModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class ProductHistoryDataModel(string productId, double oldPrice) : IValidation
+{
+    public string ProductId { get; private set; } = productId;
+    public double OldPrice { get; private set; } = oldPrice;
+    public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
+    public void Validate()
+    {
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field ProductId is not a unique identifier");
+        if (OldPrice <= 0)
+            throw new ValidationException("Field OldPrice is less than or equal to 0");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SaleDataModel.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using System.Xml;
+
+namespace PuferFishContracts.DataModels;
+
+public class SaleDataModel(string id, string workerId, string? buyerId, double sum, double points, bool isCancel, List<SaleProductDataModel> products) : 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 double Points { get; private set; } = points;
+    public bool IsCancel { get; private set; } = isCancel;
+    public List<SaleProductDataModel> Products { get; private set; } = products;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            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 (WorkerId.IsEmpty())
+            throw new ValidationException("Field WorkerId is empty");
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+        if (!BuyerId?.IsGuid() ?? !BuyerId?.IsEmpty() ?? false)
+            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SaleProductDataModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class SaleProductDataModel(string saleId, string productId, int count) : IValidation
+{
+    public string SaleId { get; private set; } = saleId;
+    public string ProductId { get; private set; } = productId;
+    public int Count { get; private set; } = count;
+    public void Validate()
+    {
+        if (SaleId.IsEmpty())
+            throw new ValidationException("Field SaleId is empty");
+        if (!SaleId.IsGuid())
+            throw new ValidationException("The value in the field SaleId is not a unique identifier");
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field ProductId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using System.Xml;
+using PuferFishContracts.Infrastructure;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Text.RegularExpressions;
+
+namespace PuferFishContracts.DataModels;
+
+public class WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string FIO { get; private set; } = fio;
+    public string PostId { get; private set; } = postId;
+    public DateTime BirthDate { get; private set; } = birthDate;
+    public DateTime EmploymentDate { get; private set; } = employmentDate;
+    public bool IsDeleted { get; private set; } = isDeleted;
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            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 (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (!Regex.IsMatch(FIO, @"\b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b"))
+            throw new ValidationException("Field FIO is not a FIO");
+
+        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 (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
+            throw new ValidationException($"Minors cannot be hired (BirthDate = { BirthDate.ToShortDateString() })");
+
+        if (EmploymentDate.Date < BirthDate.Date)
+            throw new ValidationException("The date of employment cannot be less than the date of birth");
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) //EmploymentDate.Year - BirthDate.Year
+            throw new ValidationException($"Minors cannot be hired (EmploymentDate - { EmploymentDate.ToShortDateString() }, BirthDate - { BirthDate.ToShortDateString()})");
+    }
+}

PuferFishContracts/PuferFishContracts/Enums/PostType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Enums
+{
+    public enum PostType
+    {
+        None = 0,
+        Cashier = 1,
+        chef = 2,
+        Packer = 3
+    }
+}

PuferFishContracts/PuferFishContracts/Enums/ProductType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Enums
+{
+    public enum ProductType
+    {
+        None = 0,
+        Sushi = 1,
+        Rolls = 2,
+        Onigiri = 3
+    }
+}

PuferFishContracts/PuferFishContracts/Exceptions/DateTimeExtensions.cs

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

PuferFishContracts/PuferFishContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.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;
+    }
+}

PuferFishContracts/PuferFishContracts/Exceptions/ElementNotFoundException.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Exceptions;
+
+public class ElementNotFoundException : Exception
+{
+    public string Value { get; private set; }
+    public ElementNotFoundException(string value) : base($"Element not found at value = {value}")
+    {
+        Value = value;
+    }
+}

PuferFishContracts/PuferFishContracts/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 PuferFishContracts.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}") { }
+}

PuferFishContracts/PuferFishContracts/Exceptions/NullListException.cs

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

PuferFishContracts/PuferFishContracts/Exceptions/StorageException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: { ex.Message}", ex) { }
+}

PuferFishContracts/PuferFishContracts/Exceptions/ValidationException.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Exceptions;
+
+public class ValidationException(string message) : Exception(message)
+{
+}

PuferFishContracts/PuferFishContracts/Extensions/StringExtensions.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Extensions
+{
+    public static class StringExtensions
+    {
+        public static bool IsEmpty(this string str)
+        {
+            return string.IsNullOrWhiteSpace(str);
+        }
+
+        public static bool IsGuid(this string str)
+        {
+            return Guid.TryParse(str, out var _);
+        }
+    }
+}

PuferFishContracts/PuferFishContracts/Infrastructure/IValidation.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Infrastructure
+{
+    public interface IValidation
+    {
+        void Validate();
+    }
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/IBuyerStorageContract.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.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);
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/IPointsStorageContract.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.StoragesContracts;
+
+public interface IPointsStorageContract
+{
+    List<PointsDataModel> GetList(DateTime startDate, DateTime endDate, string? buyerId = null);
+    void AddElement(PointsDataModel pointsDataModel);
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/IPostStorageContract.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.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);
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/IProductStorageContract.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.StoragesContracts;
+
+public interface IProductStorageContract
+{
+    List<ProductDataModel> GetList(bool onlyActive = true, string?
+manufacturerId = null);
+    List<ProductHistoryDataModel> GetHistoryByProductId(string productId);
+    ProductDataModel? GetElementById(string id);
+    ProductDataModel? GetElementByName(string name);
+    void AddElement(ProductDataModel productDataModel);
+    void UpdElement(ProductDataModel productDataModel);
+    void DelElement(string id);
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/ISaleStorageContract.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.StoragesContracts;
+
+public interface ISaleStorageContract
+{
+    List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? workerId = null, string? buyerId = null, string? productId = null);
+    SaleDataModel? GetElementById(string id);
+    void AddElement(SaleDataModel saleDataModel);
+    void DelElement(string id);
+}

PuferFishContracts/PuferFishContracts/StoragesContracts/IWorkerStorageContract.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishContracts.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);
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/BuyerBusinessLogicContractTests.cs

@@ -0,0 +1,407 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.BusinessLogicsContracts;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.StoragesContracts;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Extensions;
+using PuferFishBusinessLogic.Implementations;
+using Microsoft.Extensions.Logging;
+
+namespace PuferFishTests.BusinessLogicsContractsTests;
+
+[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", 0),
+        new(Guid.NewGuid().ToString(), "fio 2", "+7-555-444-33-23", 10),
+        new(Guid.NewGuid().ToString(), "fio 3", "+7-777-777-7777", 0),};
+        _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", 0);
+        _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", 0);
+        _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, 0);
+        _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("Фамилия Имя Отчество"),
+        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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 10);
+        _buyerStorageContract.Setup(x => x.AddElement(It.IsAny<BuyerDataModel>())).Callback((BuyerDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.FIO == record.FIO && x.PhoneNumber == record.PhoneNumber && x.Points == record.Points;
+        });
+        //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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0)), 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", 10)),
+        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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0)), 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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0);
+        _buyerStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<BuyerDataModel>()))
+        .Callback((BuyerDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.FIO == record.FIO && x.PhoneNumber == record.PhoneNumber && x.Points == record.Points;
+        });
+        //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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0)), 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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0)), 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", "fio", "+7-111-111-11-11", 10)),
+        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(), "Фамилия Имя Отчество", "+7-111-111-11-11", 0)), 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);
+    }
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/PointsBusinessLogicContractTests.cs

@@ -0,0 +1,289 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class PointsBusinessLogicContractTests
+{
+
+    private PointsBusinessLogicContract _pointsBusinessLogicContract;
+
+    private Mock<IPointsStorageContract> _pointsStorageContract;
+    private Mock<ISaleStorageContract> _saleStorageContract;
+    private Mock<IBuyerStorageContract> _buyerStorageContract;
+
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _pointsStorageContract = new Mock<IPointsStorageContract>();
+        _buyerStorageContract = new Mock<IBuyerStorageContract>();
+        _saleStorageContract = new Mock<ISaleStorageContract>();
+
+        _pointsBusinessLogicContract = new PointsBusinessLogicContract(_pointsStorageContract.Object, _saleStorageContract.Object, _buyerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _pointsStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllPoints_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var listOriginal = new List<PointsDataModel>
+        {
+            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),
+        };
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+
+        // Act
+        var list = _pointsBusinessLogicContract.GetAllPointsByPeriod(startDate, endDate);
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _pointsStorageContract.Verify(x => x.GetList(startDate, endDate, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPoints_ReturnEmptyList_Test()
+    {
+        // Arrange
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(new List<PointsDataModel>());
+
+        // Act
+        var list = _pointsBusinessLogicContract.GetAllPointsByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPoints_IncorrectDates_ThrowException_Test()
+    {
+        // Arrange
+        var dateTime = DateTime.UtcNow;
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriod(dateTime, dateTime), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriod(dateTime, dateTime.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllPoints_ReturnNull_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPoints_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var buyerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<PointsDataModel>
+        {
+            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),
+        };
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+
+        // Act
+        var list = _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(startDate, endDate, buyerId);
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _pointsStorageContract.Verify(x => x.GetList(startDate, endDate, buyerId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_ReturnEmptyList_Test()
+    {
+        // Arrange
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Returns(new List<PointsDataModel>());
+
+        // Act
+        var list = _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString());
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_IncorrectDates_ThrowException_Test()
+    {
+        // Arrange
+        var dateTime = DateTime.UtcNow;
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(dateTime, dateTime, Guid.NewGuid().ToString()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(dateTime, dateTime.AddSeconds(-1), Guid.NewGuid().ToString()), Throws.TypeOf<IncorrectDatesException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_BuyerIdIsNUllOrEmpty_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_BuyerIdIsNotGuid_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), "buyerId"), Throws.TypeOf<ValidationException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_ReturnNull_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()), Throws.TypeOf<NullListException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPointsByBuyer_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _pointsStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.GetAllPointsByPeriodByBuyer(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _pointsStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void CalculatePointsByMonth_CalculatePoints_Test()
+    {
+        // Arrange
+        var buyerId = Guid.NewGuid().ToString();
+        var expectedPoints = 100.0;
+
+        _buyerStorageContract.Setup(x => x.GetList())
+            .Returns(new List<BuyerDataModel> { new BuyerDataModel(buyerId, "Test", "123456789", expectedPoints) });
+
+        var calculatedPoints = 0.0;
+        _pointsStorageContract.Setup(x => x.AddElement(It.IsAny<PointsDataModel>()))
+            .Callback((PointsDataModel x) =>
+            {
+                calculatedPoints = x.Points;
+            });
+
+        // Act
+        _pointsBusinessLogicContract.CalculatePointsByMounth(DateTime.UtcNow);
+
+        // Assert
+        Assert.That(calculatedPoints, Is.EqualTo(expectedPoints));
+    }
+
+    [Test]
+    public void CalculatePointsByMonth_WithSeveralBuyers_Test()
+    {
+        // Arrange
+        var buyer1Id = Guid.NewGuid().ToString();
+        var buyer2Id = Guid.NewGuid().ToString();
+        var buyer3Id = Guid.NewGuid().ToString();
+
+        var buyers = new List<BuyerDataModel>
+        {
+            new(buyer1Id, "Test", "123456789", 0),
+            new(buyer2Id, "Test", "123456789", 0),
+            new(buyer3Id, "Test", "123456789", 0)
+        };
+
+        _buyerStorageContract.Setup(x => x.GetList())
+            .Returns(buyers);
+
+        // Act
+        _pointsBusinessLogicContract.CalculatePointsByMounth(DateTime.UtcNow);
+
+        // Assert
+        _pointsStorageContract.Verify(x => x.AddElement(It.IsAny<PointsDataModel>()), Times.Exactly(buyers.Count));
+    }
+
+    [Test]
+    public void CalculatePointsByMonth_WithoutPurchasesByBuyer_Test()
+    {
+        // Arrange
+        var buyerId = Guid.NewGuid().ToString();
+
+        // Убедитесь, что мок возвращает непустой список
+        _buyerStorageContract.Setup(x => x.GetList())
+            .Returns(new List<BuyerDataModel> { new BuyerDataModel(buyerId, "Test", "123456789", 0) });
+
+        // Установите начальное значение баллов в 0
+        var calculatedPoints = 0.0;
+        _pointsStorageContract.Setup(x => x.AddElement(It.IsAny<PointsDataModel>()))
+            .Callback((PointsDataModel x) =>
+            {
+                calculatedPoints = x.Points;
+            });
+
+        // Act
+        _pointsBusinessLogicContract.CalculatePointsByMounth(DateTime.UtcNow);
+
+        // Assert
+        Assert.That(calculatedPoints, Is.EqualTo(0));
+    }
+
+    [Test]
+    public void CalculatePointsByMonth_BuyerStorageReturnNull_ThrowException_Test()
+    {
+        // Arrange
+        _buyerStorageContract.Setup(x => x.GetList())
+            .Returns((List<BuyerDataModel>)null);
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.CalculatePointsByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void CalculatePointsByMonth_BuyerStorageThrowException_ThrowException_Test()
+    {
+        // Arrange
+        _buyerStorageContract.Setup(x => x.GetList())
+            .Throws(new StorageException(new InvalidOperationException()));
+
+        // Act & Assert
+        Assert.That(() => _pointsBusinessLogicContract.CalculatePointsByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
+    }
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/PostBusinessLogicContractTests.cs

@@ -0,0 +1,546 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishTests.BusinessLogicsContractsTests
+{
+    [TestFixture]
+    public 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, true, DateTime.UtcNow),
+            new(Guid.NewGuid().ToString(), "name 2", PostType.chef, false, DateTime.UtcNow),
+            new(Guid.NewGuid().ToString(), "name 3", PostType.chef, true, DateTime.UtcNow),};
+            _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 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, Has.Count.EqualTo(0));
+                Assert.That(listAll, Has.Count.EqualTo(0));
+            });
+            _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()),
+            Times.Exactly(2));
+        }
+        [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, true, DateTime.UtcNow),
+            new(postId, "name 2", PostType.chef, false, DateTime.UtcNow)
+};
+            _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, true, DateTime.UtcNow);
+            _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(), postName, PostType.chef, true, DateTime.UtcNow);
+            _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, true, DateTime.UtcNow.AddDays(-1));
+            _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.ChangeDate == record.ChangeDate;
+            });
+            //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, 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, true, DateTime.UtcNow)),
+            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, 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, true, DateTime.UtcNow.AddDays(-1));
+            _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.ChangeDate == record.ChangeDate;
+                });
+            //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, true, DateTime.UtcNow)),
+            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, true, DateTime.UtcNow)),
+            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, 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, true, DateTime.UtcNow)),
+            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);
+        }
+    }
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/ProductBusinessLogicContractTests.cs

@@ -0,0 +1,492 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class ProductBusinessLogicContractTests
+{
+    private ProductBusinessLogicContract _productBusinessLogicContract;
+    private Mock<IProductStorageContract> _productStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _productStorageContract = new Mock<IProductStorageContract>();
+        _productBusinessLogicContract = new ProductBusinessLogicContract(_productStorageContract.Object, new Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _productStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllProducts_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<ProductDataModel>()
+{
+new(Guid.NewGuid().ToString(), "name 1", ProductType.Onigiri, 10, false),
+new(Guid.NewGuid().ToString(), "name 2", ProductType.Onigiri, 10, true),
+new(Guid.NewGuid().ToString(), "name 3", ProductType.Onigiri, 10, false),
+};
+        _productStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _productBusinessLogicContract.GetAllProducts(true);
+        var list = _productBusinessLogicContract.GetAllProducts(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));
+        });
+        _productStorageContract.Verify(x => x.GetList(true, null),
+        Times.Once);
+        _productStorageContract.Verify(x => x.GetList(false, null),
+        Times.Once);
+    }
+    [Test]
+    public void GetAllProducts_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Returns([]);
+        //Act
+        var listOnlyActive =
+        _productBusinessLogicContract.GetAllProducts(true);
+        var list = _productBusinessLogicContract.GetAllProducts(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));
+        });
+        _productStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        null), Times.Exactly(2));
+    }
+    [Test]
+    public void GetAllProducts_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetAllProducts(It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>());
+        _productStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllProducts_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetAllProducts(It.IsAny<bool>()),
+        Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    
+    [Test]
+    public void GetProductHistoryByProduct_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var productId = Guid.NewGuid().ToString();
+        var listOriginal = new List<ProductHistoryDataModel>()
+{
+new(Guid.NewGuid().ToString(), 10),
+new(Guid.NewGuid().ToString(), 15),
+new(Guid.NewGuid().ToString(), 10),
+};
+        _productStorageContract.Setup(x =>
+        x.GetHistoryByProductId(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list =
+        _productBusinessLogicContract.GetProductHistoryByProduct(productId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(productId), Times.Once);
+    }
+    [Test]
+    public void GetProductHistoryByProduct_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.GetHistoryByProductId(It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _productBusinessLogicContract.GetProductHistoryByProduct(Guid.NewGuid().ToString(
+        ));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetProductHistoryByProduct_ProductIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductHistoryByProduct(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductHistoryByProduct(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+GetProductHistoryByProduct_ProductIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductHistoryByProduct("productId"),
+        Throws.TypeOf<ValidationException>());
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetProductHistoryByProduct_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductHistoryByProduct(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<NullListException>());
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetProductHistoryByProduct_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.GetHistoryByProductId(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductHistoryByProduct(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x =>
+        x.GetHistoryByProductId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetProductByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new ProductDataModel(id, "name", ProductType.Onigiri, 10, false);
+        _productStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _productBusinessLogicContract.GetProductByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _productStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetProductByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var name = "name";
+        var record = new ProductDataModel(Guid.NewGuid().ToString(), name, ProductType.Onigiri, 10, false);
+        _productStorageContract.Setup(x =>
+x.GetElementByName(name)).Returns(record);
+        //Act
+        var element = _productBusinessLogicContract.GetProductByData(name);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.ProductName, Is.EqualTo(name));
+        _productStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetProductByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _productStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _productStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetProductByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _productStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetProductByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductByData("name"),
+        Throws.TypeOf<ElementNotFoundException>());
+        _productStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetProductByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        _productStorageContract.Setup(x =>
+        x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.GetProductByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        Assert.That(() =>
+_productBusinessLogicContract.GetProductByData("name"),
+Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _productStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertProduct_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new ProductDataModel(Guid.NewGuid().ToString(), "name", ProductType.Onigiri, 10, false);
+        _productStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()))
+        .Callback((ProductDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.ProductName == record.ProductName && x.ProductType == record.ProductType && x.Price == record.Price && x.IsDeleted == record.IsDeleted;
+        });
+        //Act
+        _productBusinessLogicContract.InsertProduct(record);
+        //Assert
+        _productStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertProduct_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ProductDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.InsertProduct(new(Guid.NewGuid().ToString(), "name", ProductType.Onigiri, 10, false)),
+        Throws.TypeOf<ElementExistsException>());
+        _productStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertProduct_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.InsertProduct(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _productStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertProduct_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.InsertProduct(new ProductDataModel("id", "name", ProductType.Onigiri, 10, false)), Throws.TypeOf<ValidationException>());
+        _productStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertProduct_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ProductDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.InsertProduct(new(Guid.NewGuid().ToString(), "name", ProductType.Onigiri, 10, false)),
+        Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ProductDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateProduct_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new ProductDataModel(Guid.NewGuid().ToString(), "name", ProductType.Onigiri, 10, false);
+        _productStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()))
+        .Callback((ProductDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.ProductName == record.ProductName && x.ProductType == record.ProductType && x.Price ==
+    record.Price && x.IsDeleted == record.IsDeleted;
+        });
+        //Act
+        _productBusinessLogicContract.UpdateProduct(record);
+        //Assert
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void UpdateProduct_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>())).Throws(new
+        ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.UpdateProduct(new(Guid.NewGuid().ToString(),
+        "name", ProductType.Onigiri, 10, false)),
+        Throws.TypeOf<ElementNotFoundException>());
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateProduct_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.UpdateProduct(new(Guid.NewGuid().ToString(),
+        "anme", ProductType.Onigiri, 10, false)),
+        Throws.TypeOf<ElementExistsException>());
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateProduct_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.UpdateProduct(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateProduct_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.UpdateProduct(new
+        ProductDataModel("id", "name", ProductType.Onigiri, 10, false)), Throws.TypeOf<ValidationException>());
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateProduct_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.UpdateProduct(new(Guid.NewGuid().ToString(),
+        "name", ProductType.Onigiri, 10, false)),
+        Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ProductDataModel>()), Times.Once);
+    }
+    [Test]
+    public void DeleteProduct_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _productStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _productBusinessLogicContract.DeleteProduct(id);
+        //Assert
+        _productStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void DeleteProduct_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _productStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.DeleteProduct(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _productStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void DeleteProduct_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.DeleteProduct(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _productBusinessLogicContract.DeleteProduct(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _productStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void DeleteProduct_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _productBusinessLogicContract.DeleteProduct("id"),
+        Throws.TypeOf<ValidationException>());
+        _productStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void DeleteProduct_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _productStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _productBusinessLogicContract.DeleteProduct(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _productStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/SaleBusinessLogicContractTests.cs

@@ -0,0 +1,671 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class SaleBusinessLogicContractTests
+{
+    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, 10, 0, false, 
+        [new SaleProductDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
+        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, false, []),
+        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, 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, 10, 0, false,
+[new SaleProductDataModel(Guid.NewGuid().ToString(),
+Guid.NewGuid().ToString(), 5)]), new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, false, []),
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, 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, 10, 0, false,
+[new SaleProductDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, false, []),
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, 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 GetAllSalesByProductByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var productId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SaleDataModel>()
+{
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, false,
+[new SaleProductDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, false, []),
+new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, 0, 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.GetAllSalesByProductByPeriod(productId, 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, productId), Times.Once);
+    }
+    [Test]
+    public void GetAllSalesByProductByPeriod_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.GetAllSalesByProductByPeriod(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
+    GetAllSalesByProductByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod(Guid.NewGuid().ToString()
+        , date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod(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
+    GetAllSalesByProductByPeriod_ProductIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod(null, DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod(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
+    GetAllSalesByProductByPeriod_ProductIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod("productId",
+        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 GetAllSalesByProductByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _saleBusinessLogicContract.GetAllSalesByProductByPeriod(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
+    GetAllSalesByProductByPeriod_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.GetAllSalesByProductByPeriod(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,
+        10, 0, false,
+        [new SaleProductDataModel(Guid.NewGuid().ToString(),
+Guid.NewGuid().ToString(), 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(), 10, 10, false, [new SaleProductDataModel(Guid.NewGuid().ToString(),
+Guid.NewGuid().ToString(), 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.Products.Count == record.Products.Count &&
+    x.Products.First().ProductId == record.Products.First().ProductId && x.Products.First().SaleId == record.Products.First().SaleId && x.Products.First().Count == record.Products.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(), 10, 10, false,
+        [new SaleProductDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 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(), 10, 10, 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(), 10, 10, false,
+        [new SaleProductDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 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);
+    }
+}

PuferFishContracts/PuferFishTests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs

@@ -0,0 +1,729 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Moq;
+using PuferFishBusinessLogic.Implementations;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.StoragesContracts;
+
+namespace PuferFishTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+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(), "Фамилия Имя Отчество", 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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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);
+    }
+}

PuferFishContracts/PuferFishTests/DataModelsTests/BuyerDataModelTests.cs

@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests
+{
+    [TestFixture]
+    internal class BuyerDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(null, "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(string.Empty, "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var buyer = CreateDataModel("id", "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void FIOIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), null,
+            "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+            "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PhoneNumberIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество", null,
+            10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+            string.Empty, 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PhoneNumberIsIncorrectTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество", "777",
+            10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var buyerId = Guid.NewGuid().ToString();
+            var fio = "Фамилия Имя Отчество";
+            var phoneNumber = "+7-777-777-77-77";
+            var points = 11;
+            var buyer = CreateDataModel(buyerId, fio, phoneNumber, points);
+            Assert.That(() => buyer.Validate(), Throws.Nothing);
+            Assert.Multiple(() =>
+            {
+                Assert.That(buyer.Id, Is.EqualTo(buyerId));
+                Assert.That(buyer.FIO, Is.EqualTo(fio));
+                Assert.That(buyer.PhoneNumber, Is.EqualTo(phoneNumber));
+                Assert.That(buyer.Points, Is.EqualTo(points));
+            });
+        }
+        private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber, double points) => new(id, fio, phoneNumber, points);
+    }
+}

PuferFishContracts/PuferFishTests/DataModelsTests/PointsDataModelTests.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class PointsDataModelTests
+{
+    [Test]
+    public void WorkerIdIsEmptyTest()
+    {
+        var points = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+        points = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var points = CreateDataModel("workerId", DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var points = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now,
+        0);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+        points = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -
+        10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var pointsDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var buyerPoints = 10;
+        var points = CreateDataModel(buyerId, pointsDate, buyerPoints);
+        Assert.That(() => points.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(points.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(points.PointsDate, Is.EqualTo(pointsDate));
+            Assert.That(points.Points, Is.EqualTo(buyerPoints));
+        });
+    }
+    private static PointsDataModel CreateDataModel(string? buyerId, DateTime
+    pointsDate, double buyerPoints) => new(buyerId, pointsDate, buyerPoints);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, "name", PostType.chef,
+        true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, "name", PostType.chef,
+        true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", "name", PostType.chef,
+        true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.chef, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(),
+        Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(),
+        string.Empty, PostType.chef, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.None, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var postId = Guid.NewGuid().ToString();
+        var postName = "name";
+        var postType = PostType.chef;
+        var isActual = false;
+        var changeDate = DateTime.UtcNow.AddDays(-1);
+        var post = CreateDataModel(postId, postName, postType,
+        isActual, changeDate);
+        Assert.That(() => post.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(post.Id, Is.EqualTo(postId));
+            Assert.That(post.PostName, Is.EqualTo(postName));
+            Assert.That(post.PostType, Is.EqualTo(postType));
+            Assert.That(post.IsActual, Is.EqualTo(isActual));
+            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+        });
+    }
+    private static PostDataModel CreateDataModel(string? id, string? postName, PostType postType, bool isActual, DateTime changeDate) => new(id, postName, postType, isActual, changeDate);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ProductDataModelTests.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+internal class ProductDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Sushi, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name",
+        ProductType.Sushi, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Sushi, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductNameIsEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null,
+        ProductType.Sushi, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        ProductType.Sushi, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null,
+        ProductType.None, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name",
+        ProductType.Sushi, 0, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name",
+        ProductType.Sushi, -10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Sushi;
+        var productPrice = 10;
+        var productIsDelete = false;
+        var product = CreateDataModel(productId, productName, productType, productPrice, productIsDelete);
+        Assert.That(() => product.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(product.Id, Is.EqualTo(productId));
+            Assert.That(product.ProductName, Is.EqualTo(productName));
+            Assert.That(product.ProductType, Is.EqualTo(productType));
+            Assert.That(product.Price, Is.EqualTo(productPrice));
+            Assert.That(product.IsDeleted, Is.EqualTo(productIsDelete));
+        });
+    }
+    private static ProductDataModel CreateDataModel(string? id, string?
+    productName, ProductType productType, double price, bool
+    isDeleted) => new(id, productName, productType, price, isDeleted);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ProductHistoryDataModelTests.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class ProductHistoryDataModelTests
+{
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var oldPrice = 10;
+        var productHistory = CreateDataModel(productId, oldPrice);
+        Assert.That(() => productHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(productHistory.ProductId, Is.EqualTo(productId));
+            Assert.That(productHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(productHistory.ChangeDate,
+            Is.LessThan(DateTime.UtcNow));
+            Assert.That(productHistory.ChangeDate,
+            Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+    private static ProductHistoryDataModel CreateDataModel(string? productId, double oldPrice) => new(productId, oldPrice);
+
+}

PuferFishContracts/PuferFishTests/DataModelsTests/SaleDataModelTests.cs

@@ -0,0 +1,125 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class SaleDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var sale = CreateDataModel("id", Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null,
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId",
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void BuyerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), "buyerId", 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, 10,
+        false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10,
+        10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10,
+        10, false, null);
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10,
+        10, false, []);
+        Assert.That(() => sale.Validate(),
+Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var workerId = Guid.NewGuid().ToString();
+        var buyerId = Guid.NewGuid().ToString();
+        var sum = 10;
+        var points = 1;
+        var isCancel = true;
+        var products = CreateSubDataModel();
+        var sale = CreateDataModel(saleId, workerId, buyerId, sum, points, isCancel, products);
+        Assert.That(() => sale.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(sale.Id, Is.EqualTo(saleId));
+            Assert.That(sale.WorkerId, Is.EqualTo(workerId));
+            Assert.That(sale.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(sale.Sum, Is.EqualTo(sum));
+            Assert.That(sale.Points, Is.EqualTo(points));
+            Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
+            Assert.That(sale.Products, Is.EquivalentTo(products));
+        });
+    }
+    private static SaleDataModel CreateDataModel(string? id, string? workerId,
+    string? buyerId, double sum, double points, bool
+    isCancel, List<SaleProductDataModel>? products) => new(id, workerId, buyerId, sum, points, isCancel, products);
+    private static List<SaleProductDataModel> CreateSubDataModel()
+    => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

PuferFishContracts/PuferFishTests/DataModelsTests/SaleProductDataModelTests.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class SaleProductDataModelTests
+{
+    [Test]
+    public void SaleIdIsNullOrEmptyTest()
+    {
+        var saleProduct = CreateDataModel(null, Guid.NewGuid().ToString(),
+        10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(string.Empty,
+        Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void SaleIdIsNotGuidTest()
+    {
+        var saleProduct = CreateDataModel("saleId",
+        Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), null,
+        10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(string.Empty,
+        Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(),
+        "productId", 10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 0);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => saleProduct.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var productId = Guid.NewGuid().ToString();
+        var count = 10;
+        var saleProduct = CreateDataModel(saleId, productId, count);
+        Assert.That(() => saleProduct.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleProduct.SaleId, Is.EqualTo(saleId));
+            Assert.That(saleProduct.ProductId, Is.EqualTo(productId));
+            Assert.That(saleProduct.Count, Is.EqualTo(count));
+        });
+    }
+    private static SaleProductDataModel CreateDataModel(string? saleId, string? productId, int count) => new(saleId, productId, count);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "Фамилия Имя Отчество", Guid.NewGuid().ToString(),
+        DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "Фамилия Имя Отчество",
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "Фамилия Имя Отчество", Guid.NewGuid().ToString(),
+        DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество", null,
+        DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+        string.Empty, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+"postId", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now,
+        false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-
+        18).AddDays(-1), false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-
+        16), false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var fio = "Фамилия Имя Отчество";
+        var postId = Guid.NewGuid().ToString();
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, birthDate,
+        employmentDate, isDelete);
+        Assert.That(() => worker.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(worker.Id, Is.EqualTo(workerId));
+            Assert.That(worker.FIO, Is.EqualTo(fio));
+            Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate,
+            Is.EqualTo(employmentDate));
+            Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
+        });
+    }
+    private static WorkerDataModel CreateDataModel(string? id, string? fio,
+    string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) => new(id, fio, postId, birthDate, employmentDate, isDeleted);
+}

PuferFishContracts/PuferFishTests/PuferFishTests.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.4.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PuferFishBusinessLogic\PuferFishBusinessLogic.csproj" />
+    <ProjectReference Include="..\PuferFishContracts\PuferFishContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>