сданный вариант

SquirrelContract/SquirrelBusinessLogic/Implementations/ClientBusinessLogicContract.cs

@@ -9,7 +9,7 @@ using SquirrelContract.DataModels;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class ClientBusinessLogicContract(IClientStorageContract clientStorageContract, ILogger logger) : IClientBusinessLogicContract
+public class ClientBusinessLogicContract(IClientStorageContract clientStorageContract, ILogger logger) : IClientBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly IClientStorageContract _clientStorageContract = clientStorageContract;

SquirrelContract/SquirrelBusinessLogic/Implementations/CocktailBusinessLogicContract.cs

@@ -9,7 +9,7 @@ using System.Text.RegularExpressions;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class CocktailBusinessLogicContract(ICocktailStorageContract cocktailStorageContract, ILogger logger) : ICocktailBusinessLogicContract
+public class CocktailBusinessLogicContract(ICocktailStorageContract cocktailStorageContract, ILogger logger) : ICocktailBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly ICocktailStorageContract _cocktailStorageContract = cocktailStorageContract;

SquirrelContract/SquirrelBusinessLogic/Implementations/EmployeeBusinessLogicContract.cs

@@ -9,7 +9,7 @@ using System.Text.RegularExpressions;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class EmployeeBusinessLogicContract(IEmployeeStorageContract employeeStorageContract, ILogger logger) : IEmployeeBusinessLogicContract
+public class EmployeeBusinessLogicContract(IEmployeeStorageContract employeeStorageContract, ILogger logger) : IEmployeeBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly IEmployeeStorageContract _employeeStorageContract = employeeStorageContract;

SquirrelContract/SquirrelBusinessLogic/Implementations/PostBusinessLogicContract.cs

@@ -8,14 +8,14 @@ using System.Text.Json;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
+public class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly IPostStorageContract _postStorageContract = postStorageContract;
-    public List<PostDataModel> GetAllPosts(bool onlyActive = true)
+    public List<PostDataModel> GetAllPosts()
     {
-        _logger.LogInformation("GetAllPosts params: {onlyActive}", onlyActive);
-        return _postStorageContract.GetList(onlyActive) ?? throw new NullListException();
+        _logger.LogInformation("GetAllPosts");
+        return _postStorageContract.GetList() ?? throw new NullListException();
     }
 
     public List<PostDataModel> GetAllDataOfPost(string postId)

SquirrelContract/SquirrelBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -1,20 +1,26 @@
 using BarBelochkaContract.DataModels;
 using Microsoft.Extensions.Logging;
 using SquirrelContract.BusinessLogicContracts;
+using SquirrelContract.DataModels;
 using SquirrelContract.Exceptions;
 using SquirrelContract.Extensions;
+using SquirrelContract.Infastructure;
+using SquirrelContract.Infastructure.PostConfigurations;
 using SquirrelContract.StoragesContracts;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,
-    ISaleStorageContract saleStorageContract, IPostStorageContract postStorageContract, IEmployeeStorageContract employeeStorageContract, ILogger logger) : ISalaryBusinessLogicContract
+public class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,
+    ISaleStorageContract saleStorageContract, IPostStorageContract postStorageContract, IEmployeeStorageContract employeeStorageContract, ILogger logger, IConfigurationSalary сonfiguration) : ISalaryBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
     private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
     private readonly IPostStorageContract _postStorageContract = postStorageContract;
     private readonly IEmployeeStorageContract _employeeStorageContract = employeeStorageContract;
+    private readonly IConfigurationSalary _salaryConfiguration = сonfiguration;
+    private readonly Lock _lockObject = new();
+
     public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
     {
         _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}", fromDate, toDate);
@@ -51,13 +57,70 @@ internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageC
         var employees = _employeeStorageContract.GetList() ?? throw new NullListException();
         foreach (var employee in employees)
         {
-            var sales = _saleStorageContract.GetList(startDate, finishDate, employeeId: employee.Id)?.Sum(x => x.Sum) ??
-                throw new NullListException();
-            var post = _postStorageContract.GetElementById(employee.PostId) ??
-                throw new NullListException();
-            var salary = post.Salary + sales * 0.1;
+            var sales = _saleStorageContract.GetList(startDate, finishDate, employeeId: employee.Id) ?? throw new NullListException();
+            var post = _postStorageContract.GetElementById(employee.PostId) ?? throw new NullListException();
+            var salary = post.ConfigurationModel switch
+            {
+                null => 0,
+                BartenderPostConfiguration cpc => CalculateSalaryForBartender(sales, startDate, finishDate, cpc),
+                ManagerPostConfiguration spc => CalculateSalaryForManager(startDate, finishDate, spc),
+                PostConfiguration pc => pc.Rate,
+            };
             _logger.LogDebug("The employee {employeeId} was paid a salary of {salary}", employee.Id, salary);
             _salaryStorageContract.AddElement(new SalaryDataModel(employee.Id, finishDate, salary));
         }
     }
+
+    private double CalculateSalaryForBartender(List<SaleDataModel> sales, DateTime startDate, DateTime finishDate, BartenderPostConfiguration config)
+    {
+        var calcPercent = 0.0;
+        var days = (finishDate - startDate).Days;
+        var dates = Enumerable.Range(0, days)
+                             .Select(offset => startDate.AddDays(offset))
+                             .ToList();
+
+        var parallelOptions = new ParallelOptions
+        {
+            MaxDegreeOfParallelism = _salaryConfiguration.MaxConcurrentThreads
+        };
+
+        Parallel.ForEach(dates, parallelOptions, date =>
+        {
+            var salesInDay = sales.Where(x => x.SaleDate.Date == date.Date).ToArray();
+            if (salesInDay.Length == 0) return;
+
+            double dailySum = salesInDay.Sum(x => x.Sum);
+            double averageSale = dailySum / salesInDay.Length;
+
+            lock (_lockObject)
+            {
+                calcPercent += averageSale * config.SalePercent;
+            }
+        });
+        
+        double bonus = 0;
+        try
+        {
+            bonus = sales.Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum)
+                         .Sum(x => x.Sum) * config.BonusForExtraSales;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error in bonus calculation");
+        }
+
+        return config.Rate + calcPercent + bonus;
+    }
+    private double CalculateSalaryForManager(DateTime startDate, DateTime finishDate, ManagerPostConfiguration config)
+    {
+        try
+        {
+            return config.Rate + config.PersonalCountTrendPremium * _employeeStorageContract.GetEmployeeTrend(startDate, finishDate);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error in the supervisor payroll process");
+            return 0;
+        }
+    }
 }

SquirrelContract/SquirrelBusinessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -8,7 +8,7 @@ using System.Text.Json;
 
 namespace SquirrelBusinessLogic.Implementations;
 
-internal class SaleBusinessLogicContract(ISaleStorageContract
+public class SaleBusinessLogicContract(ISaleStorageContract
 saleStorageContract, ILogger logger) : ISaleBusinessLogicContract
 {
     private readonly ILogger _logger = logger;

SquirrelContract/SquirrelBusinessLogic/SquirrelBusinessLogic.csproj

@@ -12,7 +12,7 @@
 	</ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.3" />
   </ItemGroup>
 
   <ItemGroup>

SquirrelContract/SquirrelContract.sln

@@ -9,6 +9,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SquirrelTests", "SquirrelTe
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SquirrelBusinessLogic", "SquirrelBusinessLogic\SquirrelBusinessLogic.csproj", "{C03D0604-CD06-42DA-99CB-23B8306C3714}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SquirrelDatabase", "SquirrelDatabase\SquirrelDatabase.csproj", "{A8A7A434-A278-4362-8D34-C2E3CAA938C1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SquirrelWebApi", "SquirrelWebApi\SquirrelWebApi.csproj", "{45D1F24F-AFCD-4259-88C2-3076E38254A9}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,8 +31,19 @@ Global
 		{C03D0604-CD06-42DA-99CB-23B8306C3714}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C03D0604-CD06-42DA-99CB-23B8306C3714}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C03D0604-CD06-42DA-99CB-23B8306C3714}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A8A7A434-A278-4362-8D34-C2E3CAA938C1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A8A7A434-A278-4362-8D34-C2E3CAA938C1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A8A7A434-A278-4362-8D34-C2E3CAA938C1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A8A7A434-A278-4362-8D34-C2E3CAA938C1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{45D1F24F-AFCD-4259-88C2-3076E38254A9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{45D1F24F-AFCD-4259-88C2-3076E38254A9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{45D1F24F-AFCD-4259-88C2-3076E38254A9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{45D1F24F-AFCD-4259-88C2-3076E38254A9}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {E3B65E92-8603-4ED7-8214-9DA9A305DAFF}
+	EndGlobalSection
 EndGlobal

SquirrelContract/SquirrelContract/AdapterContracts/IClientAdapter.cs

@@ -0,0 +1,16 @@
+namespace SquirrelContract.AdapterContracts;
+using SquirrelContract.AdapterContracts.OperationResponses;
+using SquirrelContract.BindingModels;
+
+public interface IClientAdapter
+{
+    ClientOperationResponse GetList();
+
+    ClientOperationResponse GetElement(string data);
+
+    ClientOperationResponse RegisterClient(ClientBindingModel clientModel);
+
+    ClientOperationResponse ChangeClientInfo(ClientBindingModel clientModel);
+
+    ClientOperationResponse RemoveClient(string id);
+}

SquirrelContract/SquirrelContract/AdapterContracts/ICocktailAdapter.cs

@@ -0,0 +1,19 @@
+using SquirrelContract.BindingModels;
+using SquirrelContract.AdapterContracts.OperationResponses;
+
+namespace SquirrelContract.AdapterContracts;
+
+public interface ICocktailAdapter
+{
+    CocktailOperationResponse GetList(bool includeDeleted);
+
+    CocktailOperationResponse GetHistory(string id);
+
+    CocktailOperationResponse GetElement(string data);
+
+    CocktailOperationResponse RegisterCocktail(CocktailBindingModel cocktailModel);
+
+    CocktailOperationResponse ChangeCocktailInfo(CocktailBindingModel cocktailModel);
+
+    CocktailOperationResponse RemoveCocktail(string id);
+}

SquirrelContract/SquirrelContract/AdapterContracts/IEmployeeAdapter.cs

@@ -0,0 +1,23 @@
+using SquirrelContract.AdapterContracts.OperationResponses;
+using SquirrelContract.BindingModels;
+
+namespace SquirrelContract.AdapterContracts;
+
+public interface IEmployeeAdapter
+{
+    EmployeeOperationResponse GetList(bool includeDeleted);
+
+    EmployeeOperationResponse GetPostList(string id, bool includeDeleted);
+
+    EmployeeOperationResponse GetListByBirthDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    EmployeeOperationResponse GetListByEmploymentDate(DateTime fromDate, DateTime toDate, bool includeDeleted);
+
+    EmployeeOperationResponse GetElement(string data);
+
+    EmployeeOperationResponse RegisterEmployee(EmployeeBindingModel employeeModel);
+
+    EmployeeOperationResponse ChangeEmployeeInfo(EmployeeBindingModel employeeModel);
+
+    EmployeeOperationResponse RemoveEmployee(string id);
+}

SquirrelContract/SquirrelContract/AdapterContracts/IPostAdapter.cs

@@ -0,0 +1,21 @@
+using SquirrelContract.AdapterContracts.OperationResponses;
+using SquirrelContract.BindingModels;
+
+namespace SquirrelContract.AdapterContracts;
+
+public interface IPostAdapter
+{
+    PostOperationResponse GetList();
+
+    PostOperationResponse GetHistory(string id);
+
+    PostOperationResponse GetElement(string data);
+
+    PostOperationResponse RegisterPost(PostBindingModel postModel);
+
+    PostOperationResponse ChangePostInfo(PostBindingModel postModel);
+
+    PostOperationResponse RemovePost(string id);
+
+    PostOperationResponse RestorePost(string id);
+}

SquirrelContract/SquirrelContract/AdapterContracts/ISalaryAdapter.cs

@@ -0,0 +1,10 @@
+using SquirrelContract.AdapterContracts.OperationResponses;
+
+namespace SquirrelContract.AdapterContracts;
+
+public interface ISalaryAdapter
+{
+    SalaryOperationResponse GetListByPeriod(DateTime fromDate, DateTime toDate);
+    SalaryOperationResponse GetListByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId);
+    SalaryOperationResponse CalculateSalary(DateTime date);
+}

SquirrelContract/SquirrelContract/AdapterContracts/ISaleAdapter.cs

@@ -0,0 +1,21 @@
+using SquirrelContract.AdapterContracts.OperationResponses;
+using SquirrelContract.BindingModels;
+
+namespace SquirrelContract.AdapterContracts;
+
+public interface ISaleAdapter
+{
+    SaleOperationResponse GetList(DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetEmployeeList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetClientList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetCocktailList(string id, DateTime fromDate, DateTime toDate);
+
+    SaleOperationResponse GetElement(string id);
+
+    SaleOperationResponse MakeSale(SaleBindingModel saleModel);
+
+    SaleOperationResponse CancelSale(string id);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/ClientOperationResponse.cs

@@ -0,0 +1,19 @@
+using SquirrelContract.ViewModels;
+using SquirrelContract.Infrastructure;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class ClientOperationResponse : OperationResponse
+{
+    public static ClientOperationResponse OK(List<ClientViewModel> data) => OK<ClientOperationResponse, List<ClientViewModel>>(data);
+
+    public static ClientOperationResponse OK(ClientViewModel data) => OK<ClientOperationResponse, ClientViewModel>(data);
+
+    public static ClientOperationResponse NoContent() => NoContent<ClientOperationResponse>();
+
+    public static ClientOperationResponse BadRequest(string message) => BadRequest<ClientOperationResponse>(message);
+
+    public static ClientOperationResponse NotFound(string message) => NotFound<ClientOperationResponse>(message);
+
+    public static ClientOperationResponse InternalServerError(string message) => InternalServerError<ClientOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/CocktailOperationResponse.cs

@@ -0,0 +1,21 @@
+using SquirrelContract.ViewModels;
+using SquirrelContract.Infrastructure;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class CocktailOperationResponse : OperationResponse
+{
+    public static CocktailOperationResponse OK(List<CocktailViewModel> data) => OK<CocktailOperationResponse, List<CocktailViewModel>>(data);
+
+    public static CocktailOperationResponse OK(List<CocktailHistoryViewModel> data) => OK<CocktailOperationResponse, List<CocktailHistoryViewModel>>(data);
+
+    public static CocktailOperationResponse OK(CocktailViewModel data) => OK<CocktailOperationResponse, CocktailViewModel>(data);
+
+    public static CocktailOperationResponse NoContent() => NoContent<CocktailOperationResponse>();
+
+    public static CocktailOperationResponse NotFound(string message) => NotFound<CocktailOperationResponse>(message);
+
+    public static CocktailOperationResponse BadRequest(string message) => BadRequest<CocktailOperationResponse>(message);
+
+    public static CocktailOperationResponse InternalServerError(string message) => InternalServerError<CocktailOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/EmployeeOperationResponse.cs

@@ -0,0 +1,19 @@
+using SquirrelContract.ViewModels;
+using SquirrelContract.Infrastructure;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class EmployeeOperationResponse : OperationResponse
+{
+    public static EmployeeOperationResponse OK(List<EmployeeViewModel> data) => OK<EmployeeOperationResponse, List<EmployeeViewModel>>(data);
+
+    public static EmployeeOperationResponse OK(EmployeeViewModel data) => OK<EmployeeOperationResponse, EmployeeViewModel>(data);
+
+    public static EmployeeOperationResponse NoContent() => NoContent<EmployeeOperationResponse>();
+
+    public static EmployeeOperationResponse NotFound(string message) => NotFound<EmployeeOperationResponse>(message);
+
+    public static EmployeeOperationResponse BadRequest(string message) => BadRequest<EmployeeOperationResponse>(message);
+
+    public static EmployeeOperationResponse InternalServerError(string message) => InternalServerError<EmployeeOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/PostOperationResponse.cs

@@ -0,0 +1,19 @@
+using SquirrelContract.Infrastructure;
+using SquirrelContract.ViewModels;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class PostOperationResponse : OperationResponse
+{
+    public static PostOperationResponse OK(List<PostViewModel> data) => OK<PostOperationResponse, List<PostViewModel>>(data);
+
+    public static PostOperationResponse OK(PostViewModel data) => OK<PostOperationResponse, PostViewModel>(data);
+
+    public static PostOperationResponse NoContent() => NoContent<PostOperationResponse>();
+
+    public static PostOperationResponse NotFound(string message) => NotFound<PostOperationResponse>(message);
+
+    public static PostOperationResponse BadRequest(string message) => BadRequest<PostOperationResponse>(message);
+
+    public static PostOperationResponse InternalServerError(string message) => InternalServerError<PostOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/SalaryOperationResponse.cs

@@ -0,0 +1,13 @@
+using SquirrelContract.Infrastructure;
+using SquirrelContract.ViewModels;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class SalaryOperationResponse : OperationResponse
+{
+    public static SalaryOperationResponse OK(List<SalaryViewModel> data) => OK<SalaryOperationResponse, List<SalaryViewModel>>(data);
+    public static SalaryOperationResponse NoContent() => NoContent<SalaryOperationResponse>();
+    public static SalaryOperationResponse NotFound(string message) => NotFound<SalaryOperationResponse>(message);
+    public static SalaryOperationResponse BadRequest(string message) => BadRequest<SalaryOperationResponse>(message);
+    public static SalaryOperationResponse InternalServerError(string message) => InternalServerError<SalaryOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/AdapterContracts/OperationResponses/SaleOperationResponse.cs

@@ -0,0 +1,19 @@
+using SquirrelContract.ViewModels;
+using SquirrelContract.Infrastructure;
+
+namespace SquirrelContract.AdapterContracts.OperationResponses;
+
+public class SaleOperationResponse : OperationResponse
+{
+    public static SaleOperationResponse OK(List<SaleViewModel> data) => OK<SaleOperationResponse, List<SaleViewModel>>(data);
+
+    public static SaleOperationResponse OK(SaleViewModel data) => OK<SaleOperationResponse, SaleViewModel>(data);
+
+    public static SaleOperationResponse NoContent() => NoContent<SaleOperationResponse>();
+
+    public static SaleOperationResponse NotFound(string message) => NotFound<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse BadRequest(string message) => BadRequest<SaleOperationResponse>(message);
+
+    public static SaleOperationResponse InternalServerError(string message) => InternalServerError<SaleOperationResponse>(message);
+}

SquirrelContract/SquirrelContract/BindingModels/ClientBindingModel.cs

@@ -0,0 +1,12 @@
+namespace SquirrelContract.BindingModels;
+
+public class ClientBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+}

SquirrelContract/SquirrelContract/BindingModels/CocktailBindingModel.cs

@@ -0,0 +1,9 @@
+namespace SquirrelContract.BindingModels;
+
+public class CocktailBindingModel
+{
+    public string? Id { get; set; }
+    public string? CocktailName { get; set; }
+    public double Price { get; set; }
+    public string? BaseAlcohol { get; set; }
+}

SquirrelContract/SquirrelContract/BindingModels/EmployeeBindingModel.cs

@@ -0,0 +1,16 @@
+namespace SquirrelContract.BindingModels;
+
+public class EmployeeBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? FIO { get; set; }
+
+    public string? Email { get; set; } 
+
+    public string? PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

SquirrelContract/SquirrelContract/BindingModels/PostBindingModel.cs

@@ -0,0 +1,14 @@
+namespace SquirrelContract.BindingModels;
+
+public class PostBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? PostId => Id;
+
+    public string? PostName { get; set; }
+
+    public string? PostType { get; set; }
+
+    public string? ConfigurationJson { get; set; }
+}

SquirrelContract/SquirrelContract/BindingModels/SaleBindingModel.cs

@@ -0,0 +1,14 @@
+namespace SquirrelContract.BindingModels;
+
+public class SaleBindingModel
+{
+    public string? Id { get; set; }
+
+    public string? EmployeeId { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public int DiscountType { get; set; }
+
+    public List<SaleCocktailBindingModel>? Cocktails { get; set; }
+}

SquirrelContract/SquirrelContract/BindingModels/SaleCocktailBindingModel.cs

@@ -0,0 +1,12 @@
+namespace SquirrelContract.BindingModels;
+
+public class SaleCocktailBindingModel
+{
+    public string? SaleId { get; set; }
+
+    public string? CocktailId { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

SquirrelContract/SquirrelContract/BusinessLogicContracts/IPostBusinessLogicContract.cs

@@ -4,7 +4,7 @@ namespace SquirrelContract.BusinessLogicContracts;
 
 public interface IPostBusinessLogicContract
 {
-    List<PostDataModel> GetAllPosts(bool onlyActive);
+    List<PostDataModel> GetAllPosts();
 
     List<PostDataModel> GetAllDataOfPost(string postId);
 

SquirrelContract/SquirrelContract/DataModels/CocktailHistoryDataModel.cs

@@ -6,12 +6,22 @@ namespace SquirrelContract.DataModels;
 
 public class CocktailHistoryDataModel(string cocktailId, double oldPrice) : IValidation
 {
+    private readonly CocktailDataModel? _cocktail;
+
     public string CocktailId { get; private set; } = cocktailId;
 
     public double OldPrice { get; private set; } = oldPrice;
 
     public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
 
+    public string CocktailName => _cocktail?.CocktailName ?? string.Empty;
+
+    public CocktailHistoryDataModel(string cocktailId, double oldPrice, DateTime changeDate, CocktailDataModel cocktail) : this(cocktailId, oldPrice)
+    {
+        ChangeDate = changeDate;
+        _cocktail = cocktail;
+    }
+
     public void Validate()
     {
         if (CocktailId.IsEmpty())

SquirrelContract/SquirrelContract/DataModels/EmployeeDataModel.cs

@@ -7,6 +7,8 @@ namespace SquirrelContract.DataModels;
 
 public class EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
 {
+    private readonly PostDataModel? _post;
+
     public string Id { get; private set; } = id;
 
     public string FIO { get; private set; } = fio;
@@ -21,6 +23,15 @@ public class EmployeeDataModel(string id, string fio, string email, string postI
 
     public bool IsDeleted { get; private set; } = isDeleted;
 
+    public string PostName => _post?.PostName ?? string.Empty;
+
+    public EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted, PostDataModel post) : this(id, fio, email, postId, birthDate, employmentDate, isDeleted)
+    {
+        _post = post;
+    }
+
+    public EmployeeDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate) : this(id, fio, email, postId, birthDate, employmentDate, false) { }
+
     public void Validate()
     {
         if (Id.IsEmpty())

SquirrelContract/SquirrelContract/DataModels/PostDataModel.cs

@@ -1,23 +1,36 @@
-using SquirrelContract.Enums;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json;
+using SquirrelContract.Enums;
 using SquirrelContract.Exceptions;
 using SquirrelContract.Extensions;
 using SquirrelContract.Infastructure;
+using SquirrelContract.Infastructure.PostConfigurations;
 
 namespace SquirrelContract.DataModels;
 
-public class PostDataModel(string id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+public class PostDataModel(string postId, string postName, PostType postType, PostConfiguration configuration) : IValidation
 {
-    public string Id { get; private set; } = id;
+    public string Id { get; private set; } = postId;
 
     public string PostName { get; private set; } = postName;
 
     public PostType PostType { get; private set; } = postType;
 
-    public double Salary { get; private set; } = salary;
+    public PostConfiguration ConfigurationModel { get; private set; } = configuration;
 
-    public bool IsActual { get; private set; } = isActual;
-
-    public DateTime ChangeDate { get; private set; } = changeDate;
+    public PostDataModel(string postId, string postName, PostType postType, string configurationJson) : this(postId, postName, postType, (PostConfiguration)null)
+    {
+        var obj = JToken.Parse(configurationJson);
+        if (obj is not null)
+        {
+            ConfigurationModel = obj.Value<string>("Type") switch
+            {
+                nameof(BartenderPostConfiguration) => JsonConvert.DeserializeObject<BartenderPostConfiguration>(configurationJson)!,
+                nameof(ManagerPostConfiguration) => JsonConvert.DeserializeObject<ManagerPostConfiguration>(configurationJson)!,
+                _ => JsonConvert.DeserializeObject<PostConfiguration>(configurationJson)!,
+            };
+        }
+    }
 
     public void Validate()
     {
@@ -33,7 +46,9 @@ public class PostDataModel(string id, string postName, PostType postType, double
         if (PostType == PostType.None)
             throw new ValidationException("Field PostType is empty");
 
-        if (Salary <= 0)
-            throw new ValidationException("Field Salary is empty");
+        if (ConfigurationModel is null)
+            throw new ValidationException("Field ConfigurationModel is not initialized");
+        if (ConfigurationModel!.Rate <= 0)
+            throw new ValidationException("Field Rate is less or equal zero");
     }
 }

SquirrelContract/SquirrelContract/DataModels/SalaryDataModel.cs

@@ -1,4 +1,5 @@
-using SquirrelContract.Exceptions;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
 using SquirrelContract.Extensions;
 using SquirrelContract.Infastructure;
 
@@ -6,12 +7,21 @@ namespace BarBelochkaContract.DataModels;
 
 public class SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary) : IValidation
 {
+    private readonly EmployeeDataModel? _employee;
+
     public string EmployeeId { get; private set; } = employeeId;
 
     public DateTime SalaryDate { get; private set; } = salaryDate;
 
     public double Salary { get; private set; } = employeeSalary;
 
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SalaryDataModel(string employeeId, DateTime salaryDate, double employeeSalary, EmployeeDataModel employee) : this(employeeId, salaryDate, employeeSalary)
+    {
+        _employee = employee;
+    }
+
     public void Validate()
     {
         if (EmployeeId.IsEmpty())

SquirrelContract/SquirrelContract/DataModels/SaleCocktailDataModel.cs

@@ -4,14 +4,25 @@ using SquirrelContract.Infastructure;
 
 namespace SquirrelContract.DataModels;
 
-public class SaleCocktailDataModel(string saleId, string cocktailId, int count) : IValidation
+public class SaleCocktailDataModel(string saleId, string cocktailId, int count, double price) : IValidation
 {
+    private readonly CocktailDataModel? _cocktail;
+
     public string SaleId { get; private set; } = saleId;
 
     public string CocktailId { get; private set; } = cocktailId;
 
     public int Count { get; private set; } = count;
 
+    public double Price { get; private set; } = price;
+
+    public string CocktailName => _cocktail?.CocktailName ?? string.Empty;
+
+    public SaleCocktailDataModel(string saleId, string cocktailId, int count, double price, CocktailDataModel cocktail) : this(saleId, cocktailId, count, price)
+    {
+        _cocktail = cocktail;
+    }
+
     public void Validate()
     {
         if (SaleId.IsEmpty())
@@ -21,12 +32,15 @@ public class SaleCocktailDataModel(string saleId, string cocktailId, int count)
             throw new ValidationException("The value in the field SaleId is not a unique identifier");
 
         if (CocktailId.IsEmpty())
-            throw new ValidationException("Field ProductId is empty");
+            throw new ValidationException("Field CocktailId is empty");
 
         if (!CocktailId.IsGuid())
-            throw new ValidationException("The value in the field ProductId is not a unique identifier");
+            throw new ValidationException("The value in the field CocktailId is not a unique identifier");
 
         if (Count <= 0)
             throw new ValidationException("Field Count is less than or equal to 0");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
     }
 }

SquirrelContract/SquirrelContract/DataModels/SaleDataModel.cs

@@ -5,25 +5,76 @@ using SquirrelContract.Infastructure;
 
 namespace SquirrelContract.DataModels;
 
-public class SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel, List<SaleCocktailDataModel> cocktails) : IValidation
+public class SaleDataModel : IValidation
 {
-    public string Id { get; private set; } = id;
+    private readonly ClientDataModel? _client;
 
-    public string EmployeeId { get; private set; } = employeeId;
+    private readonly EmployeeDataModel? _employee;
 
-    public string? ClientId { get; private set; } = clientId;
+    public string Id { get; private set; }
+
+    public string EmployeeId { get; private set; }
+
+    public string? ClientId { get; private set; }
 
     public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
 
-    public double Sum { get; private set; } = sum;
+    public double Sum { get; private set; }
 
-    public DiscountType DiscountType { get; private set; } = discountType;
+    public DiscountType DiscountType { get; private set; }
 
-    public double Discount { get; private set; } = discount;
+    public double Discount { get; private set; }
 
-    public bool IsCancel { get; private set; } = isCancel;
+    public bool IsCancel { get; private set; }
 
-    public List<SaleCocktailDataModel> Cocktails { get; private set; } = cocktails;
+    public List<SaleCocktailDataModel>? Cocktails { get; private set; }
+
+    public string ClientFIO => _client?.FIO ?? string.Empty;
+
+    public string EmployeeFIO => _employee?.FIO ?? string.Empty;
+
+    public SaleDataModel(string id, string employeeId, string? clientId, DiscountType discountType, bool isCancel, List<SaleCocktailDataModel> saleCocktails)
+    {
+        Id = id;
+        EmployeeId = employeeId;
+        ClientId = clientId;
+        DiscountType = discountType;
+        IsCancel = isCancel;
+        Cocktails = saleCocktails;
+        var percent = 0.0;
+        foreach (DiscountType elem in Enum.GetValues<DiscountType>())
+        {
+            if ((elem & discountType) != 0)
+            {
+                switch (elem)
+                {
+                    case DiscountType.None:
+                        break;
+                    case DiscountType.OnSale:
+                        percent += 0.1;
+                        break;
+                    case DiscountType.RegularCustomer:
+                        percent += 0.5;
+                        break;
+                    case DiscountType.Certificate:
+                        percent += 0.3;
+                        break;
+                }
+            }
+        }
+        Sum = Cocktails?.Sum(x => x.Price * x.Count) ?? 0;
+        Discount = Sum * percent;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel, List<SaleCocktailDataModel> saleCocktails, EmployeeDataModel employee, ClientDataModel? client) : this(id, employeeId, clientId, discountType, isCancel, saleCocktails)
+    {
+        Sum = sum;
+        Discount = discount;
+        _employee = employee;
+        _client = client;
+    }
+
+    public SaleDataModel(string id, string employeeId, string? clientId, int discountType, List<SaleCocktailDataModel> cocktails) : this(id, employeeId, clientId, (DiscountType)discountType, false, cocktails) { }
 
     public void Validate()
     {
@@ -40,7 +91,7 @@ public class SaleDataModel(string id, string employeeId, string? clientId, doubl
             throw new ValidationException("The value in the field EmployeeId is not a unique identifier");
 
         if (!ClientId?.IsGuid() ?? !ClientId?.IsEmpty() ?? false)
-            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+            throw new ValidationException("The value in the field ClientId is not a unique identifier");
 
         if (Sum <= 0)
             throw new ValidationException("Field Sum is less than or equal to 0");

SquirrelContract/SquirrelContract/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,6 @@
+namespace SquirrelContract.Exceptions;
+
+public class ElementDeletedException : Exception
+{
+	public ElementDeletedException(string id) : base($"Cannot modify a deleted item (id: {id})") { }
+}

SquirrelContract/SquirrelContract/Infastructure/IConfigurationDatabase.cs

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

SquirrelContract/SquirrelContract/Infastructure/IConfigurationSalary.cs

@@ -0,0 +1,7 @@
+namespace SquirrelContract.Infastructure;
+
+public interface IConfigurationSalary
+{
+    double ExtraSaleSum { get; }
+    int MaxConcurrentThreads { get; }
+}

SquirrelContract/SquirrelContract/Infastructure/OperationResponse.cs

@@ -0,0 +1,37 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System.Net;
+
+namespace SquirrelContract.Infrastructure;
+
+public class OperationResponse
+{
+	protected HttpStatusCode StatusCode { get; set; }
+
+	protected object? Result { get; set; }
+
+	public IActionResult GetResponse(HttpRequest request, HttpResponse response)
+	{
+		ArgumentNullException.ThrowIfNull(request);
+		ArgumentNullException.ThrowIfNull(response);
+
+		response.StatusCode = (int)StatusCode;
+
+		if (Result is null)
+		{
+			return new StatusCodeResult((int)StatusCode);
+		}
+
+		return new ObjectResult(Result);
+	}
+
+	protected static TResult OK<TResult, TData>(TData data) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.OK, Result = data };
+
+	protected static TResult NoContent<TResult>() where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.NoContent };
+
+	protected static TResult BadRequest<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.BadRequest, Result = errorMessage };
+
+	protected static TResult NotFound<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.NotFound, Result = errorMessage };
+
+	protected static TResult InternalServerError<TResult>(string? errorMessage = null) where TResult : OperationResponse, new() => new() { StatusCode = HttpStatusCode.InternalServerError, Result = errorMessage };
+}

SquirrelContract/SquirrelContract/Infastructure/PostConfigurations/BartenderPostConfiguration.cs

@@ -0,0 +1,17 @@
+using Microsoft.Extensions.Configuration;
+
+namespace SquirrelContract.Infastructure.PostConfigurations;
+
+public class BartenderPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(BartenderPostConfiguration);
+    public double SalePercent { get; set; }
+    public double BonusForExtraSales { get; set; }
+    public BartenderPostConfiguration(IConfiguration? config = null)
+    {
+        if (config != null)
+        {
+            config.GetSection("BartenderSettings");
+        }
+    }
+}

SquirrelContract/SquirrelContract/Infastructure/PostConfigurations/ManagerPostConfiguration.cs

@@ -0,0 +1,7 @@
+namespace SquirrelContract.Infastructure.PostConfigurations;
+
+public class ManagerPostConfiguration : PostConfiguration
+{
+    public override string Type => nameof(ManagerPostConfiguration);
+    public double PersonalCountTrendPremium { get; set; }
+}

SquirrelContract/SquirrelContract/Infastructure/PostConfigurations/PostConfiguration.cs

@@ -0,0 +1,7 @@
+namespace SquirrelContract.Infastructure.PostConfigurations;
+
+public class PostConfiguration
+{
+    public virtual string Type => nameof(PostConfiguration);
+    public double Rate { get; set; }
+}

SquirrelContract/SquirrelContract/SquirrelContract.csproj

@@ -6,4 +6,9 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
+  </ItemGroup>
+
 </Project>

SquirrelContract/SquirrelContract/StoragesContracts/IEmployeeStorageContract.cs

@@ -17,4 +17,6 @@ public interface IEmployeeStorageContract
     void UpdElement(EmployeeDataModel employeeDataModel);
 
     void DelElement(string id);
+
+    int GetEmployeeTrend(DateTime fromPeriod, DateTime toPeriod);
 }

SquirrelContract/SquirrelContract/StoragesContracts/IPostStorageContract.cs

@@ -4,7 +4,7 @@ namespace SquirrelContract.StoragesContracts;
 
 public interface IPostStorageContract
 {
-    List<PostDataModel> GetList(bool onlyActual = true);
+    List<PostDataModel> GetList();
     List<PostDataModel> GetPostWithHistory(string postId);
     PostDataModel? GetElementById(string id);
     PostDataModel? GetElementByName(string name);

SquirrelContract/SquirrelContract/StoragesContracts/ISalaryStorageContract.cs

@@ -4,7 +4,7 @@ namespace SquirrelContract.StoragesContracts;
 
 public interface ISalaryStorageContract
 {
-    List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? employeeId = null);
+    List<SalaryDataModel> GetList(DateTime? startDate, DateTime? endDate, string? employeeId = null);
 
     void AddElement(SalaryDataModel salaryDataModel);
 }

SquirrelContract/SquirrelContract/ViewModels/ClientViewModel.cs

@@ -0,0 +1,12 @@
+namespace SquirrelContract.ViewModels;
+
+public class ClientViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public required string PhoneNumber { get; set; }
+
+    public double DiscountSize { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/CocktailHistoryViewModel.cs

@@ -0,0 +1,10 @@
+namespace SquirrelContract.ViewModels;
+
+public class CocktailHistoryViewModel
+{
+    public required string CocktailName { get; set; }
+
+    public double OldPrice { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/CocktailViewModel.cs

@@ -0,0 +1,13 @@
+namespace SquirrelContract.ViewModels;
+
+public class CocktailViewModel
+{
+    public required string Id { get; set; }
+
+    public required string CocktailName { get; set; }
+
+    public required string BaseAlcohol { get; set; }
+
+    public double Price { get; set; }
+
+}

SquirrelContract/SquirrelContract/ViewModels/EmployeeViewModel.cs

@@ -0,0 +1,20 @@
+namespace SquirrelContract.ViewModels;
+
+public class EmployeeViewModel
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public string Email {  get; set; }
+
+    public required string PostId { get; set; }
+
+    public required string PostName { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/PostViewModel.cs

@@ -0,0 +1,12 @@
+namespace SquirrelContract.ViewModels;
+
+public class PostViewModel
+{
+    public required string Id { get; set; }
+
+    public required string PostName { get; set; }
+
+    public required string PostType { get; set; }
+
+    public required string Configuration { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/SalaryViewModel.cs

@@ -0,0 +1,9 @@
+namespace SquirrelContract.ViewModels;
+
+public class SalaryViewModel
+{
+    public required string EmployeeId { get; set; }
+    public required string EmployeeFIO { get; set; }
+    public DateTime SalaryDate { get; set; }
+    public double Salary { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/SaleCocktailViewModel.cs

@@ -0,0 +1,12 @@
+namespace SquirrelContract.ViewModels;
+
+public class SaleCocktailViewModel
+{
+    public required string CocktailId { get; set; }
+
+    public required string CocktailName { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+}

SquirrelContract/SquirrelContract/ViewModels/SaleViewModel.cs

@@ -0,0 +1,26 @@
+namespace SquirrelContract.ViewModels;
+
+public class SaleViewModel
+{
+    public required string Id { get; set; }
+
+    public required string EmployeeId { get; set; }
+
+    public required string EmployeeFIO { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public string? ClientFIO { get; set; }
+
+    public DateTime SaleDate { get; set; }
+
+    public double Sum { get; set; }
+
+    public required string DiscountType { get; set; }
+
+    public double Discount { get; set; }
+
+    public bool IsCancel { get; set; }
+
+    public required List<SaleCocktailViewModel> Cocktails { get; set; }
+}

SquirrelContract/SquirrelDatabase/DefaultConfigurationDatabase.cs

@@ -0,0 +1,8 @@
+using SquirrelContract.Infastructure;
+
+namespace SquirrelDatabase;
+
+class DefaultConfigurationDatabase : IConfigurationDatabase
+{
+    public string ConnectionString => "";
+}

SquirrelContract/SquirrelDatabase/Implementations/ClientStorageContract.cs

@@ -0,0 +1,149 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+using System;
+
+namespace SquirrelDatabase.Implementations;
+
+public class ClientStorageContract : IClientStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public ClientStorageContract(SquirrelDbContext squirrelDbContext)
+    {
+        _dbContext = squirrelDbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(SquirrelDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<ClientDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Clients.Select(x => _mapper.Map<ClientDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ClientDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(GetClientById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ClientDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ClientDataModel? GetElementByPhoneNumber(string phoneNumber)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            _dbContext.Clients.Add(_mapper.Map<Client>(clientDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", clientDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            var element = GetClientById(clientDataModel.Id) ?? throw new ElementNotFoundException(clientDataModel.Id);
+            _dbContext.Clients.Update(_mapper.Map(clientDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetClientById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Clients.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Client? GetClientById(string id) => _dbContext.Clients.FirstOrDefault(x => x.Id == id);
+}

SquirrelContract/SquirrelDatabase/Implementations/CocktailStorageContract.cs

@@ -0,0 +1,179 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+
+namespace SquirrelDatabase.Implementations;
+
+public class CocktailStorageContract : ICocktailStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public CocktailStorageContract(SquirrelDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Cocktail, CocktailDataModel>();
+            cfg.CreateMap<CocktailDataModel, Cocktail>();
+            cfg.CreateMap<CocktailHistory, CocktailHistoryDataModel>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<CocktailDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Cocktails.Select(x => _mapper.Map<CocktailDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<CocktailHistoryDataModel> GetHistoryByCocktailId(string cocktailId)
+    {
+        try
+        {
+            return [.. _dbContext.CocktailHistories.Include(x => x.Cocktail).Where(x => x.CocktailId == cocktailId).OrderByDescending(x => x.ChangeDate).Select(x => _mapper.Map<CocktailHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public CocktailDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<CocktailDataModel>(GetCocktailById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public CocktailDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<CocktailDataModel>(_dbContext.Cocktails.FirstOrDefault(x => x.CocktailName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(CocktailDataModel cocktailDataModel)
+    {
+        try
+        {
+            _dbContext.Cocktails.Add(_mapper.Map<Cocktail>(cocktailDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", cocktailDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Cocktails_CocktailName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("CocktailName", cocktailDataModel.CocktailName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(CocktailDataModel cocktailDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetCocktailById(cocktailDataModel.Id) ?? throw new ElementNotFoundException(cocktailDataModel.Id);
+                if (element.Price != cocktailDataModel.Price)
+                {
+                    _dbContext.CocktailHistories.Add(new CocktailHistory() { CocktailId = element.Id, OldPrice = element.Price });
+                    _dbContext.SaveChanges();
+                }
+                _dbContext.Cocktails.Update(_mapper.Map(cocktailDataModel, element));
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Cocktails_CocktailName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("CocktailName", cocktailDataModel.CocktailName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetCocktailById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Cocktails.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetCocktailById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Cocktail? GetCocktailById(string id) => _dbContext.Cocktails.FirstOrDefault(x => x.Id == id);
+}

SquirrelContract/SquirrelDatabase/Implementations/EmployeeStorageContract.cs

@@ -0,0 +1,178 @@
+using AutoMapper;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+
+namespace SquirrelDatabase.Implementations;
+
+public class EmployeeStorageContract : IEmployeeStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public EmployeeStorageContract(SquirrelDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<EmployeeDataModel, Employee>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<EmployeeDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Employees.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (postId is not null)
+            {
+                query = query.Where(x => x.PostId == postId);
+            }
+            if (fromBirthDate is not null && toBirthDate is not null)
+            {
+                query = query.Where(x => x.BirthDate >= DateTime.SpecifyKind(fromBirthDate ?? DateTime.UtcNow, DateTimeKind.Utc) && x.BirthDate <= DateTime.SpecifyKind(toBirthDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not null)
+            {
+                query = query.Where(x => x.EmploymentDate >= DateTime.SpecifyKind(fromEmploymentDate ?? DateTime.UtcNow, DateTimeKind.Utc) && x.EmploymentDate <= DateTime.SpecifyKind(toEmploymentDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            }
+            return [.. JoinPost(query).Select(x => _mapper.Map<EmployeeDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(GetEmployeeById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(AddPost(_dbContext.Employees.FirstOrDefault(x => x.FIO == fio && !x.IsDeleted)));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByEmail(string email)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(AddPost(_dbContext.Employees.FirstOrDefault(x => x.Email == email && !x.IsDeleted)));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            _dbContext.Employees.Add(_mapper.Map<Employee>(employeeDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", employeeDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            var element = GetEmployeeById(employeeDataModel.Id) ?? throw new ElementNotFoundException(employeeDataModel.Id);
+            _dbContext.Employees.Update(_mapper.Map(employeeDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetEmployeeById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public int GetEmployeeTrend(DateTime fromPeriod, DateTime toPeriod)
+    {
+        try
+        {
+            var countWorkersOnBegining = _dbContext.Employees.Count(x => x.EmploymentDate < fromPeriod && (!x.IsDeleted || x.DateOfDelete > fromPeriod));
+            var countWorkersOnEnding = _dbContext.Employees.Count(x => x.EmploymentDate < toPeriod && (!x.IsDeleted || x.DateOfDelete > toPeriod));
+            return countWorkersOnEnding - countWorkersOnBegining;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Employee? GetEmployeeById(string id) => AddPost(_dbContext.Employees.FirstOrDefault(x => x.Id == id && !x.IsDeleted));
+
+    private IQueryable<Employee> JoinPost(IQueryable<Employee> query)
+        => query.GroupJoin(_dbContext.Posts.Where(x => x.IsActual), x => x.PostId, y => y.PostId, (x, y) => new { Employee = x, Post = y })
+                .SelectMany(xy => xy.Post.DefaultIfEmpty(), (x, y) => x.Employee.AddPost(y));
+
+    private Employee? AddPost(Employee? employee)
+        => employee?.AddPost(_dbContext.Posts.FirstOrDefault(x => x.PostId == employee.PostId && x.IsActual));
+}

SquirrelContract/SquirrelDatabase/Implementations/PostStorageContract.cs

@@ -0,0 +1,187 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+
+namespace SquirrelDatabase.Implementations;
+
+public class PostStorageContract : IPostStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(SquirrelDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<PostDataModel, Post>()
+                .ForMember(x => x.Id, x => x.Ignore())
+                .ForMember(x => x.PostId, x => x.MapFrom(src => src.Id))
+                .ForMember(x => x.IsActual, x => x.MapFrom(src => true))
+                .ForMember(x => x.ChangeDate, x => x.MapFrom(src => DateTime.UtcNow))
+                .ForMember(x => x.Configuration, x => x.MapFrom(src =>
+src.ConfigurationModel));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<PostDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<PostDataModel> GetPostWithHistory(string postId)
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Where(x => x.PostId == postId).Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostName == name && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            _dbContext.Posts.Add(_mapper.Map<Post>(postDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostId_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", postDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetPostById(postDataModel.Id) ?? throw new ElementNotFoundException(postDataModel.Id);
+                if (!element.IsActual)
+                {
+                    throw new ElementDeletedException(postDataModel.Id);
+                }
+                element.IsActual = false;
+                _dbContext.SaveChanges();
+                var newElement = _mapper.Map<Post>(postDataModel);
+                _dbContext.Posts.Add(newElement);
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            if (!element.IsActual)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsActual = false;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            element.IsActual = true;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Post? GetPostById(string id) => _dbContext.Posts.Where(x => x.PostId == id).OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+}

SquirrelContract/SquirrelDatabase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,62 @@
+using AutoMapper;
+using BarBelochkaContract.DataModels;
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+
+namespace SquirrelDatabase.Implementations;
+
+public class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(SquirrelDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.EmployeeSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SalaryDataModel> GetList(DateTime? startDate, DateTime? endDate, string? employeeId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Include(d => d.Employee).AsQueryable();
+            if (startDate.HasValue)
+                query = query.Where(x => x.SalaryDate >= DateTime.SpecifyKind(startDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (endDate.HasValue)
+                query = query.Where(x => x.SalaryDate <= DateTime.SpecifyKind(endDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (employeeId != null)
+                query = query.Where(x => x.EmployeeId == employeeId);
+            return [.. query.Select(x => _mapper.Map<SalaryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SalaryDataModel salaryDataModel)
+    {
+        try
+        {
+            _dbContext.Salaries.Add(_mapper.Map<Salary>(salaryDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Implementations/SaleStorageContract.cs

@@ -0,0 +1,120 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.DataModels;
+using SquirrelContract.Exceptions;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Models;
+using System;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace SquirrelDatabase.Implementations;
+
+public class SaleStorageContract : ISaleStorageContract
+{
+    private readonly SquirrelDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SaleStorageContract(SquirrelDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {            
+            cfg.CreateMap<Client, ClientDataModel>();
+            cfg.CreateMap<Cocktail, CocktailDataModel>();
+            cfg.CreateMap<Employee, EmployeeDataModel>();
+            cfg.CreateMap<SaleCocktail, SaleCocktailDataModel>();
+            cfg.CreateMap<SaleCocktailDataModel, SaleCocktail>()
+                    .ForMember(x => x.Cocktail, x => x.Ignore());
+            cfg.CreateMap<Sale, SaleDataModel>();
+            cfg.CreateMap<SaleDataModel, Sale>()
+                .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+                .ForMember(x => x.SaleCocktails, x => x.MapFrom(src => src.Cocktails))
+                .ForMember(x => x.Employee, x => x.Ignore())
+                .ForMember(x => x.Client, x => x.Ignore());
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, string? clientId = null, string? cocktailId = null)
+    {
+        try
+        {
+            var query = _dbContext.Sales
+                .Include(r => r.Employee)
+                .Include(r => r.Client)
+                .Include(r => r.SaleCocktails)!
+                .ThenInclude(d => d.Cocktail)
+                .AsQueryable();
+            if (startDate.HasValue)
+                query = query.Where(x => x.SaleDate >= DateTime.SpecifyKind(startDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (endDate.HasValue)
+                query = query.Where(x => x.SaleDate <= DateTime.SpecifyKind(endDate ?? DateTime.UtcNow, DateTimeKind.Utc));
+            if (employeeId != null)
+                query = query.Where(x => x.EmployeeId == employeeId);
+            if (clientId != null)
+                query = query.Where(x => x.ClientId == clientId);
+            if (cocktailId != null)
+                query = query.Where(x => x.SaleCocktails!.Any(y => y.CocktailId == cocktailId));
+            var s = query.ToList();
+            return [.. query.Select(x => _mapper.Map<SaleDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SaleDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SaleDataModel>(GetSaleById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SaleDataModel saleDataModel)
+    {
+        try
+        {
+            _dbContext.Sales.Add(_mapper.Map<Sale>(saleDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetSaleById(id) ?? throw new ElementNotFoundException(id);
+            if (element.IsCancel)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsCancel = true;
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Sale? GetSaleById(string id) => _dbContext.Sales.Include(x => x.Client).Include(x => x.Employee).Include(x => x.SaleCocktails)!.ThenInclude(x => x.Cocktail).FirstOrDefault(x => x.Id == id);
+}

SquirrelContract/SquirrelDatabase/Migrations/20250407181533_FirstMigration.Designer.cs

@@ -0,0 +1,330 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SquirrelDatabase;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    [DbContext(typeof(SquirrelDbContext))]
+    [Migration("20250407181533_FirstMigration")]
+    partial class FirstMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<double>("DiscountSize")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneNumber")
+                        .IsUnique();
+
+                    b.ToTable("Clients");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<int>("BaseAlcohol")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CocktailName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailName")
+                        .IsUnique();
+
+                    b.ToTable("Cocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("CocktailId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("CocktailHistories");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("EmployeeSalary")
+                        .HasColumnType("double precision");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClientId")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Discount")
+                        .HasColumnType("double precision");
+
+                    b.Property<int>("DiscountType")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("SaleDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClientId");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.Property<string>("SaleId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("CocktailId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("SaleId", "CocktailId");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("CocktailHistories")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Salaries")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Client", "Client")
+                        .WithMany("Sales")
+                        .HasForeignKey("ClientId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Sales")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Client");
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SquirrelDatabase.Models.Sale", "Sale")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("SaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+
+                    b.Navigation("Sale");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Navigation("CocktailHistories");
+
+                    b.Navigation("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Navigation("Salaries");
+
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Navigation("SaleCocktails");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/20250407181533_FirstMigration.cs

@@ -0,0 +1,252 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class FirstMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Clients",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    FIO = table.Column<string>(type: "text", nullable: false),
+                    PhoneNumber = table.Column<string>(type: "text", nullable: false),
+                    DiscountSize = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Clients", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Cocktails",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    CocktailName = table.Column<string>(type: "text", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false),
+                    BaseAlcohol = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Cocktails", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Employees",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    FIO = table.Column<string>(type: "text", nullable: false),
+                    Email = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    BirthDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    EmploymentDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    IsDeleted = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Employees", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Posts",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    PostName = table.Column<string>(type: "text", nullable: false),
+                    PostType = table.Column<int>(type: "integer", nullable: false),
+                    Salary = table.Column<double>(type: "double precision", nullable: false),
+                    IsActual = table.Column<bool>(type: "boolean", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Posts", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "CocktailHistories",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    CocktailId = table.Column<string>(type: "text", nullable: false),
+                    OldPrice = table.Column<double>(type: "double precision", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CocktailHistories", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_CocktailHistories_Cocktails_CocktailId",
+                        column: x => x.CocktailId,
+                        principalTable: "Cocktails",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Salaries",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    EmployeeId = table.Column<string>(type: "text", nullable: false),
+                    SalaryDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    EmployeeSalary = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Salaries", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Salaries_Employees_EmployeeId",
+                        column: x => x.EmployeeId,
+                        principalTable: "Employees",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Sales",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    EmployeeId = table.Column<string>(type: "text", nullable: false),
+                    ClientId = table.Column<string>(type: "text", nullable: true),
+                    SaleDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    Sum = table.Column<double>(type: "double precision", nullable: false),
+                    DiscountType = table.Column<int>(type: "integer", nullable: false),
+                    Discount = table.Column<double>(type: "double precision", nullable: false),
+                    IsCancel = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Sales", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Sales_Clients_ClientId",
+                        column: x => x.ClientId,
+                        principalTable: "Clients",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                    table.ForeignKey(
+                        name: "FK_Sales_Employees_EmployeeId",
+                        column: x => x.EmployeeId,
+                        principalTable: "Employees",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "SaleCocktails",
+                columns: table => new
+                {
+                    SaleId = table.Column<string>(type: "text", nullable: false),
+                    CocktailId = table.Column<string>(type: "text", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_SaleCocktails", x => new { x.SaleId, x.CocktailId });
+                    table.ForeignKey(
+                        name: "FK_SaleCocktails_Cocktails_CocktailId",
+                        column: x => x.CocktailId,
+                        principalTable: "Cocktails",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_SaleCocktails_Sales_SaleId",
+                        column: x => x.SaleId,
+                        principalTable: "Sales",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Clients_PhoneNumber",
+                table: "Clients",
+                column: "PhoneNumber",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CocktailHistories_CocktailId",
+                table: "CocktailHistories",
+                column: "CocktailId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Cocktails_CocktailName",
+                table: "Cocktails",
+                column: "CocktailName",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostId_IsActual",
+                table: "Posts",
+                columns: new[] { "PostId", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostName_IsActual",
+                table: "Posts",
+                columns: new[] { "PostName", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Salaries_EmployeeId",
+                table: "Salaries",
+                column: "EmployeeId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_SaleCocktails_CocktailId",
+                table: "SaleCocktails",
+                column: "CocktailId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Sales_ClientId",
+                table: "Sales",
+                column: "ClientId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Sales_EmployeeId",
+                table: "Sales",
+                column: "EmployeeId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "CocktailHistories");
+
+            migrationBuilder.DropTable(
+                name: "Posts");
+
+            migrationBuilder.DropTable(
+                name: "Salaries");
+
+            migrationBuilder.DropTable(
+                name: "SaleCocktails");
+
+            migrationBuilder.DropTable(
+                name: "Cocktails");
+
+            migrationBuilder.DropTable(
+                name: "Sales");
+
+            migrationBuilder.DropTable(
+                name: "Clients");
+
+            migrationBuilder.DropTable(
+                name: "Employees");
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/20250407203820_ChangeFieldsInPost.Designer.cs

@@ -0,0 +1,331 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SquirrelDatabase;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    [DbContext(typeof(SquirrelDbContext))]
+    [Migration("20250407203820_ChangeFieldsInPost")]
+    partial class ChangeFieldsInPost
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<double>("DiscountSize")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneNumber")
+                        .IsUnique();
+
+                    b.ToTable("Clients");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<int>("BaseAlcohol")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CocktailName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailName")
+                        .IsUnique();
+
+                    b.ToTable("Cocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("CocktailId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("CocktailHistories");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Configuration")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("EmployeeSalary")
+                        .HasColumnType("double precision");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClientId")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Discount")
+                        .HasColumnType("double precision");
+
+                    b.Property<int>("DiscountType")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("SaleDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClientId");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.Property<string>("SaleId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("CocktailId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("SaleId", "CocktailId");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("CocktailHistories")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Salaries")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Client", "Client")
+                        .WithMany("Sales")
+                        .HasForeignKey("ClientId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Sales")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Client");
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SquirrelDatabase.Models.Sale", "Sale")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("SaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+
+                    b.Navigation("Sale");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Navigation("CocktailHistories");
+
+                    b.Navigation("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Navigation("Salaries");
+
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Navigation("SaleCocktails");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/20250407203820_ChangeFieldsInPost.cs

@@ -0,0 +1,40 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class ChangeFieldsInPost : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Salary",
+                table: "Posts");
+
+            migrationBuilder.AddColumn<string>(
+                name: "Configuration",
+                table: "Posts",
+                type: "jsonb",
+                nullable: false,
+                defaultValue: "{\"Rate\": 0, \"Type\": \"PostConfiguration\"}");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Configuration",
+                table: "Posts");
+
+            migrationBuilder.AddColumn<double>(
+                name: "Salary",
+                table: "Posts",
+                type: "double precision",
+                nullable: false,
+                defaultValue: 0.0);
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/20250408214441_ChangeEmployee.Designer.cs

@@ -0,0 +1,334 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SquirrelDatabase;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    [DbContext(typeof(SquirrelDbContext))]
+    [Migration("20250408214441_ChangeEmployee")]
+    partial class ChangeEmployee
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<double>("DiscountSize")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneNumber")
+                        .IsUnique();
+
+                    b.ToTable("Clients");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<int>("BaseAlcohol")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CocktailName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailName")
+                        .IsUnique();
+
+                    b.ToTable("Cocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("CocktailId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("CocktailHistories");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateOfDelete")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Configuration")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("EmployeeSalary")
+                        .HasColumnType("double precision");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClientId")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Discount")
+                        .HasColumnType("double precision");
+
+                    b.Property<int>("DiscountType")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("SaleDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClientId");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.Property<string>("SaleId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("CocktailId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("SaleId", "CocktailId");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("CocktailHistories")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Salaries")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Client", "Client")
+                        .WithMany("Sales")
+                        .HasForeignKey("ClientId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Sales")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Client");
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SquirrelDatabase.Models.Sale", "Sale")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("SaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+
+                    b.Navigation("Sale");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Navigation("CocktailHistories");
+
+                    b.Navigation("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Navigation("Salaries");
+
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Navigation("SaleCocktails");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/20250408214441_ChangeEmployee.cs

@@ -0,0 +1,29 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class ChangeEmployee : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "DateOfDelete",
+                table: "Employees",
+                type: "timestamp without time zone",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "DateOfDelete",
+                table: "Employees");
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Migrations/SquirrelDbContextModelSnapshot.cs

@@ -0,0 +1,331 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SquirrelDatabase;
+
+#nullable disable
+
+namespace SquirrelDatabase.Migrations
+{
+    [DbContext(typeof(SquirrelDbContext))]
+    partial class SquirrelDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<double>("DiscountSize")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneNumber")
+                        .IsUnique();
+
+                    b.ToTable("Clients");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<int>("BaseAlcohol")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("CocktailName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailName")
+                        .IsUnique();
+
+                    b.ToTable("Cocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("CocktailId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("CocktailHistories");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateOfDelete")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Configuration")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("EmployeeSalary")
+                        .HasColumnType("double precision");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClientId")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Discount")
+                        .HasColumnType("double precision");
+
+                    b.Property<int>("DiscountType")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("EmployeeId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("SaleDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClientId");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.Property<string>("SaleId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("CocktailId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("SaleId", "CocktailId");
+
+                    b.HasIndex("CocktailId");
+
+                    b.ToTable("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.CocktailHistory", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("CocktailHistories")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Salaries")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Client", "Client")
+                        .WithMany("Sales")
+                        .HasForeignKey("ClientId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("SquirrelDatabase.Models.Employee", "Employee")
+                        .WithMany("Sales")
+                        .HasForeignKey("EmployeeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Client");
+
+                    b.Navigation("Employee");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.SaleCocktail", b =>
+                {
+                    b.HasOne("SquirrelDatabase.Models.Cocktail", "Cocktail")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("CocktailId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SquirrelDatabase.Models.Sale", "Sale")
+                        .WithMany("SaleCocktails")
+                        .HasForeignKey("SaleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cocktail");
+
+                    b.Navigation("Sale");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Client", b =>
+                {
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Cocktail", b =>
+                {
+                    b.Navigation("CocktailHistories");
+
+                    b.Navigation("SaleCocktails");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Employee", b =>
+                {
+                    b.Navigation("Salaries");
+
+                    b.Navigation("Sales");
+                });
+
+            modelBuilder.Entity("SquirrelDatabase.Models.Sale", b =>
+                {
+                    b.Navigation("SaleCocktails");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

SquirrelContract/SquirrelDatabase/Models/Client.cs

@@ -0,0 +1,18 @@
+using AutoMapper;
+using SquirrelContract.DataModels;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SquirrelDatabase.Models;
+
+[AutoMap(typeof(ClientDataModel), ReverseMap = true)]
+public class Client
+{
+    public required string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string FIO { get; set; } 
+    public required string PhoneNumber { get; set; } 
+    public double DiscountSize { get; set; }
+
+    [ForeignKey("ClientId")]
+    public List<Sale>? Sales { get; set; }
+
+}

SquirrelContract/SquirrelDatabase/Models/Cocktail.cs

@@ -0,0 +1,18 @@
+using SquirrelContract.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SquirrelDatabase.Models;
+
+public class Cocktail
+{
+    public required string Id { get; set; }
+    public required string CocktailName { get; set; }
+    public double Price { get; set; }
+    public required AlcoholType BaseAlcohol { get; set; }
+
+    [ForeignKey("CocktailId")]
+    public List<CocktailHistory>? CocktailHistories { get; set; }
+
+    [ForeignKey("CocktailId")]
+    public List<SaleCocktail>? SaleCocktails { get; set; }
+}

SquirrelContract/SquirrelDatabase/Models/CocktailHistory.cs

@@ -0,0 +1,14 @@
+namespace SquirrelDatabase.Models;
+
+public class CocktailHistory
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string CocktailId { get; set; }
+
+    public double OldPrice { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+
+    public Cocktail? Cocktail { get; set; }
+}

SquirrelContract/SquirrelDatabase/Models/Employee.cs

@@ -0,0 +1,40 @@
+using AutoMapper;
+using SquirrelContract.DataModels;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SquirrelDatabase.Models;
+
+[AutoMap(typeof(EmployeeDataModel), ReverseMap = true)]
+public class Employee
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public string Email { get; set; }
+
+    public required string PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; }
+
+    public bool IsDeleted { get; set; }
+
+    public DateTime? DateOfDelete { get; set; }
+
+    [NotMapped]
+    public Post? Post { get; set; }
+
+    [ForeignKey("EmployeeId")]
+    public List<Salary>? Salaries { get; set; }
+
+    [ForeignKey("EmployeeId")]
+    public List<Sale>? Sales { get; set; }
+
+    public Employee AddPost(Post? post)
+    {
+        Post = post;
+        return this;
+    }
+}

SquirrelContract/SquirrelDatabase/Models/Post.cs

@@ -0,0 +1,23 @@
+using AutoMapper;
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Infastructure.PostConfigurations;
+
+namespace SquirrelDatabase.Models;
+
+public class Post
+{
+    public required string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string PostId { get; set; }
+
+    public required string PostName { get; set; }
+
+    public PostType PostType { get; set; }
+
+    public required PostConfiguration Configuration { get; set; }
+
+    public bool IsActual { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+}

SquirrelContract/SquirrelDatabase/Models/Salary.cs

@@ -0,0 +1,18 @@
+using AutoMapper;
+using BarBelochkaContract.DataModels;
+
+namespace SquirrelDatabase.Models;
+
+public class Salary
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string EmployeeId { get; set; }
+
+    public DateTime SalaryDate { get; set; }
+
+    public double EmployeeSalary { get; set; }
+
+    public Employee? Employee { get; set; }
+
+}

SquirrelContract/SquirrelDatabase/Models/Sale.cs

@@ -0,0 +1,33 @@
+using AutoMapper;
+using BarBelochkaContract.DataModels;
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SquirrelDatabase.Models;
+
+public class Sale
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string EmployeeId { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public DateTime SaleDate { get; set; }
+
+    public double Sum { get; set; }
+
+    public DiscountType DiscountType { get; set; }
+
+    public double Discount { get; set; }
+
+    public bool IsCancel { get; set; }
+
+    public Employee? Employee { get; set; }  
+
+    public Client? Client { get; set; }
+
+    [ForeignKey("SaleId")]
+    public List<SaleCocktail>? SaleCocktails { get; set; }
+}

SquirrelContract/SquirrelDatabase/Models/SaleCocktail.cs

@@ -0,0 +1,16 @@
+namespace SquirrelDatabase.Models;
+
+public class SaleCocktail
+{
+    public required string SaleId { get; set; }
+
+    public required string CocktailId { get; set; }
+
+    public int Count { get; set; }
+
+    public double Price { get; set; }
+
+    public Sale? Sale { get; set; }
+
+    public Cocktail? Cocktail { get; set; }
+}

SquirrelContract/SquirrelDatabase/SampleContextFactory.cs

@@ -0,0 +1,12 @@
+using Microsoft.EntityFrameworkCore.Design;
+using SquirrelDatabase;
+
+namespace SquirrelDatabase;
+
+public class SampleContextFactory : IDesignTimeDbContextFactory<SquirrelDbContext>
+{
+    public SquirrelDbContext CreateDbContext(string[] args)
+    {
+        return new SquirrelDbContext(new DefaultConfigurationDatabase());
+    }
+}

SquirrelContract/SquirrelDatabase/SquirrelDatabase.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SquirrelContract\SquirrelContract.csproj" />
+  </ItemGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="SquirrelTests" />
+		<InternalVisibleTo Include="SquirrelWebApi" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+
+</Project>

SquirrelContract/SquirrelDatabase/SquirrelDbContext.cs

@@ -0,0 +1,84 @@
+using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using SquirrelContract.Infastructure;
+using SquirrelContract.Infastructure.PostConfigurations;
+using SquirrelDatabase.Models;
+
+namespace SquirrelDatabase;
+
+public class SquirrelDbContext: DbContext
+{
+    private readonly IConfigurationDatabase? _configurationDatabase;
+
+    public SquirrelDbContext(IConfigurationDatabase configurationDatabase)
+    {
+        _configurationDatabase = configurationDatabase;
+        AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+        AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
+    }
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseNpgsql(_configurationDatabase?.ConnectionString, o
+        => o.SetPostgresVersion(12, 2));
+        base.OnConfiguring(optionsBuilder);
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Client>().HasIndex(x => x.PhoneNumber).IsUnique();
+
+        modelBuilder.Entity<Sale>()
+            .HasOne(e => e.Client)
+            .WithMany(e => e.Sales)
+            .OnDelete(DeleteBehavior.SetNull);
+
+        modelBuilder.Entity<Cocktail>().HasIndex(x => x.CocktailName).IsUnique();
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostName, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostId, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<SaleCocktail>().HasKey(x => new { x.SaleId, x.CocktailId });
+
+        modelBuilder.Entity<Post>()
+           .Property(x => x.Configuration)
+           .HasColumnType("jsonb")
+           .HasConversion(
+           x => SerializePostConfiguration(x),
+           x => DeserialzePostConfiguration(x));
+    }
+
+    public DbSet<Client> Clients { get; set; }
+
+    public DbSet<Post> Posts { get; set; }
+
+    public DbSet<Cocktail> Cocktails { get; set; }
+
+    public DbSet<CocktailHistory> CocktailHistories { get; set; }
+
+    public DbSet<Salary> Salaries { get; set; }
+
+    public DbSet<Sale> Sales { get; set; }
+
+    public DbSet<SaleCocktail> SaleCocktails { get; set; }
+
+    public DbSet<Employee> Employees { get; set; }
+
+    private static string SerializePostConfiguration(PostConfiguration postConfiguration) => JsonConvert.SerializeObject(postConfiguration);
+    private static PostConfiguration DeserialzePostConfiguration(string jsonString) => JToken.Parse(jsonString).Value<string>("Type") switch
+    {
+        nameof(BartenderPostConfiguration) => JsonConvert.DeserializeObject<BartenderPostConfiguration>(jsonString)!,
+        nameof(ManagerPostConfiguration) => JsonConvert.DeserializeObject<ManagerPostConfiguration>(jsonString)!,
+        _ => JsonConvert.DeserializeObject<PostConfiguration>(jsonString)!,
+    };
+}

SquirrelContract/SquirrelTests/BusinessLogicContractsTests/PostBusinessLogicContractTests.cs

@@ -4,6 +4,7 @@ using SquirrelBusinessLogic.Implementations;
 using SquirrelContract.DataModels;
 using SquirrelContract.Enums;
 using SquirrelContract.Exceptions;
+using SquirrelContract.Infastructure.PostConfigurations;
 using SquirrelContract.StoragesContracts;
 
 namespace SquirrelTests.BusinessLogicContractsTests;
@@ -33,61 +34,53 @@ internal class PostBusinessLogicContractTests
         //Arrange
         var listOriginal = new List<PostDataModel>()
         {
-            new(Guid.NewGuid().ToString(),"name 1", PostType.Manager, 10, true, DateTime.UtcNow),
-            new(Guid.NewGuid().ToString(), "name 2", PostType.Manager, 10, false, DateTime.UtcNow),
-            new(Guid.NewGuid().ToString(), "name 3", PostType.Manager, 10, true, DateTime.UtcNow),
+            new(Guid.NewGuid().ToString(),"name 1", PostType.Bartender, new PostConfiguration() { Rate = 10 }),
+            new(Guid.NewGuid().ToString(), "name 2", PostType.Bartender, new PostConfiguration() { Rate = 10 }),
+            new(Guid.NewGuid().ToString(), "name 3", PostType.Bartender, new PostConfiguration() { Rate = 10 }),
         };
-        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+        _postStorageContract.Setup(x => x.GetList()).Returns(listOriginal);
         //Act
-        var listOnlyActive = _postBusinessLogicContract.GetAllPosts(true);
-        var listAll = _postBusinessLogicContract.GetAllPosts(false);
+        var list = _postBusinessLogicContract.GetAllPosts();
         //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));
+            Assert.That(list, Is.Not.Null);
+            Assert.That(list, Is.EquivalentTo(listOriginal));
         });
-        _postStorageContract.Verify(x => x.GetList(true), Times.Once);
-        _postStorageContract.Verify(x => x.GetList(false), Times.Once);
+        _postStorageContract.Verify(x => x.GetList(), Times.Once);
     }
 
     [Test]
     public void GetAllPosts_ReturnEmptyList_Test()
     {
         //Arrange
-        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns([]);
+        _postStorageContract.Setup(x => x.GetList()).Returns([]);
         //Act
-        var listOnlyActive = _postBusinessLogicContract.GetAllPosts(true);
-        var listAll = _postBusinessLogicContract.GetAllPosts(false);
+        var list = _postBusinessLogicContract.GetAllPosts();
         //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));
+            Assert.That(list, Is.Not.Null);
+            Assert.That(list, 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);
+        Assert.That(() => _postBusinessLogicContract.GetAllPosts(), Throws.TypeOf<NullListException>());
+        _postStorageContract.Verify(x => x.GetList(), Times.Once);
     }
 
     [Test]
     public void GetAllPosts_StorageThrowError_ThrowException_Test()
     {
         //Arrange
-        _postStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Throws(new StorageException(new InvalidOperationException()));
+        _postStorageContract.Setup(x => x.GetList()).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);
+        Assert.That(() => _postBusinessLogicContract.GetAllPosts(), Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.GetList(), Times.Once);
     }
 
     [Test]
@@ -97,8 +90,8 @@ internal class PostBusinessLogicContractTests
         var postId = Guid.NewGuid().ToString();
         var listOriginal = new List<PostDataModel>()
         {
-            new(postId, "name 1", PostType.Manager, 10, true, DateTime.UtcNow),
-            new(postId, "name 2", PostType.Manager, 10, false, DateTime.UtcNow)
+            new(postId, "name 1", PostType.Bartender, new PostConfiguration() { Rate = 10 }),
+            new(postId, "name 2", PostType.Bartender, new PostConfiguration() { Rate = 10 })
         };
         _postStorageContract.Setup(x => x.GetPostWithHistory(It.IsAny<string>())).Returns(listOriginal);
         //Act
@@ -162,7 +155,7 @@ internal class PostBusinessLogicContractTests
     {
         //Arrange
         var id = Guid.NewGuid().ToString();
-        var record = new PostDataModel(id, "name", PostType.Manager, 10, true, DateTime.UtcNow);
+        var record = new PostDataModel(id, "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         _postStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
         //Act
         var element = _postBusinessLogicContract.GetPostByData(id);
@@ -177,7 +170,7 @@ internal class PostBusinessLogicContractTests
     {
         //Arrange
         var postName = "name";
-        var record = new PostDataModel(Guid.NewGuid().ToString(), postName, PostType.Manager, 10, true, DateTime.UtcNow);
+        var record = new PostDataModel(Guid.NewGuid().ToString(), postName, PostType.Bartender, new PostConfiguration() { Rate = 10 });
         _postStorageContract.Setup(x => x.GetElementByName(postName)).Returns(record);
         //Act
         var element = _postBusinessLogicContract.GetPostByData(postName);
@@ -233,12 +226,11 @@ internal class PostBusinessLogicContractTests
     {
         //Arrange
         var flag = false;
-        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, 10, true, DateTime.UtcNow.AddDays(-1));
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         _postStorageContract.Setup(x => x.AddElement(It.IsAny<PostDataModel>()))
             .Callback((PostDataModel x) =>
             {
-                flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary &&
-                    x.ChangeDate == record.ChangeDate;
+                flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.ConfigurationModel.Rate == record.ConfigurationModel.Rate;
             });
         //Act
         _postBusinessLogicContract.InsertPost(record);
@@ -253,7 +245,7 @@ internal class PostBusinessLogicContractTests
         //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.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementExistsException>());
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<ElementExistsException>());
         _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
     }
 
@@ -269,7 +261,7 @@ internal class PostBusinessLogicContractTests
     public void InsertPost_InvalidRecord_ThrowException_Test()
     {
         //Act&Assert
-        Assert.That(() => _postBusinessLogicContract.InsertPost(new PostDataModel("id", "name", PostType.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<ValidationException>());
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new PostDataModel("id", "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<ValidationException>());
         _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
     }
 
@@ -279,7 +271,7 @@ internal class PostBusinessLogicContractTests
         //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.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<StorageException>());
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<StorageException>());
         _postStorageContract.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
     }
 
@@ -288,12 +280,11 @@ internal class PostBusinessLogicContractTests
     {
         //Arrange
         var flag = false;
-        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, 10, true, DateTime.UtcNow.AddDays(-1));
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>()))
             .Callback((PostDataModel x) =>
             {
-                flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary &&
-                    x.ChangeDate == record.ChangeDate;
+                flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.ConfigurationModel.Rate == record.ConfigurationModel.Rate;
             });
         //Act
         _postBusinessLogicContract.UpdatePost(record);
@@ -308,7 +299,7 @@ internal class PostBusinessLogicContractTests
         //Arrange
         _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementNotFoundException(""));
         //Act&Assert
-        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementNotFoundException>());
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<ElementNotFoundException>());
         _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
     }
 
@@ -318,7 +309,7 @@ internal class PostBusinessLogicContractTests
         //Arrange
         _postStorageContract.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementExistsException("Data", "Data"));
         //Act&Assert
-        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "anme", PostType.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementExistsException>());
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "anme", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<ElementExistsException>());
         _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
     }
 
@@ -334,7 +325,7 @@ internal class PostBusinessLogicContractTests
     public void UpdatePost_InvalidRecord_ThrowException_Test()
     {
         //Act&Assert
-        Assert.That(() => _postBusinessLogicContract.UpdatePost(new PostDataModel("id", "name", PostType.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<ValidationException>());
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new PostDataModel("id", "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<ValidationException>());
         _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
     }
 
@@ -344,7 +335,7 @@ internal class PostBusinessLogicContractTests
         //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.Bartender, 10, true, DateTime.UtcNow)), Throws.TypeOf<StorageException>());
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 10 })), Throws.TypeOf<StorageException>());
         _postStorageContract.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
     }
 

SquirrelContract/SquirrelTests/BusinessLogicContractsTests/SalaryBusinessLogicContractTests.cs

@@ -5,6 +5,8 @@ using SquirrelBusinessLogic.Implementations;
 using SquirrelContract.DataModels;
 using SquirrelContract.Enums;
 using SquirrelContract.Exceptions;
+using SquirrelContract.Infastructure.PostConfigurations;
+using SquirrelContract.Infrastructure;
 using SquirrelContract.StoragesContracts;
 
 namespace SquirrelTests.BusinessLogicContractsTests;
@@ -17,6 +19,7 @@ internal class SalaryBusinessLogicContractTests
     private Mock<ISaleStorageContract> _saleStorageContract;
     private Mock<IPostStorageContract> _postStorageContract;
     private Mock<IEmployeeStorageContract> _employeeStorageContract;
+    private readonly ConfigurationSalaryTest _salaryConfigurationTest = new();
 
     [OneTimeSetUp]
     public void OneTimeSetUp()
@@ -26,7 +29,7 @@ internal class SalaryBusinessLogicContractTests
         _postStorageContract = new Mock<IPostStorageContract>();
         _employeeStorageContract = new Mock<IEmployeeStorageContract>();
         _salaryBusinessLogicContract = new SalaryBusinessLogicContract(_salaryStorageContract.Object,
-            _saleStorageContract.Object, _postStorageContract.Object, _employeeStorageContract.Object, new Mock<ILogger>().Object);
+            _saleStorageContract.Object, _postStorageContract.Object, _employeeStorageContract.Object, new Mock<ILogger>().Object, _salaryConfigurationTest);
     }
 
     [TearDown]
@@ -160,7 +163,7 @@ internal class SalaryBusinessLogicContractTests
     public void GetAllSalariesByEmployee_EmployeeIdIsNotGuid_ThrowException_Test()
     {
         //Act&Assert
-        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), "workerId"), Throws.TypeOf<ValidationException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), "employeeId"), Throws.TypeOf<ValidationException>());
         _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
     }
 
@@ -187,16 +190,14 @@ internal class SalaryBusinessLogicContractTests
     {
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
-        var saleSum = 200.0;
-        var postSalary = 2000.0;
+        var rate = 2000.0;
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, saleSum, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)])]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, postSalary, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = rate }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         var sum = 0.0;
-        var expectedSum = postSalary + saleSum * 0.1;
         _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
             .Callback((SalaryDataModel x) =>
             {
@@ -205,29 +206,30 @@ internal class SalaryBusinessLogicContractTests
         //Act
         _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
         //Assert
-        Assert.That(sum, Is.EqualTo(expectedSum));
+        Assert.That(sum, Is.EqualTo(rate));
     }
 
+
     [Test]
-    public void CalculateSalaryByMounth_WithSeveralWorkers_Test()
+    public void CalculateSalaryByMounth_WithSeveralEmployees_Test()
     {
         //Arrange
         var employee1Id = Guid.NewGuid().ToString();
         var employee2Id = Guid.NewGuid().ToString();
         var employee3Id = Guid.NewGuid().ToString();
         var list = new List<EmployeeDataModel>() {
-            new(employee1Id, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
-            new(employee2Id, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
-            new(employee3Id, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)
+            new(employee1Id, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
+            new(employee2Id, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false),
+            new(employee3Id, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)
         };
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employee1Id, null, 1, DiscountType.None, 0, false, []),
-            new SaleDataModel(Guid.NewGuid().ToString(), employee1Id, null, 1, DiscountType.None, 0, false, []),
-            new SaleDataModel(Guid.NewGuid().ToString(), employee2Id, null, 1, DiscountType.None, 0, false, []),
-            new SaleDataModel(Guid.NewGuid().ToString(), employee3Id, null, 1, DiscountType.None, 0, false, []),
-            new SaleDataModel(Guid.NewGuid().ToString(), employee3Id, null, 1, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employee1Id, null, DiscountType.None, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), employee1Id, null, DiscountType.None, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), employee2Id, null, DiscountType.None, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), employee3Id, null, DiscountType.None, false, []),
+            new SaleDataModel(Guid.NewGuid().ToString(), employee3Id, null, DiscountType.None, false, [])]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 2000, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 100 }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
             .Returns(list);
         //Act
@@ -237,19 +239,18 @@ internal class SalaryBusinessLogicContractTests
     }
 
     [Test]
-    public void CalculateSalaryByMounth_WithoutSalesByWorker_Test()
+    public void CalculateSalaryByMounth_WithoutSalesByEmployee_Test()
     {
         //Arrange
-        var postSalary = 2000.0;
+        var rate = 2000.0;
         var employeeId = Guid.NewGuid().ToString();
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
             .Returns([]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, postSalary, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = rate }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         var sum = 0.0;
-        var expectedSum = postSalary;
         _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
             .Callback((SalaryDataModel x) =>
             {
@@ -258,7 +259,7 @@ internal class SalaryBusinessLogicContractTests
         //Act
         _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
         //Assert
-        Assert.That(sum, Is.EqualTo(expectedSum));
+        Assert.That(sum, Is.EqualTo(rate));
     }
 
     [Test]
@@ -267,9 +268,9 @@ internal class SalaryBusinessLogicContractTests
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 2000, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 100 }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
     }
@@ -280,22 +281,22 @@ internal class SalaryBusinessLogicContractTests
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, 200, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [])]);
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
     }
 
     [Test]
-    public void CalculateSalaryByMounth_WorkerStorageReturnNull_ThrowException_Test()
+    public void CalculateSalaryByMounth_EmployeeStorageReturnNull_ThrowException_Test()
     {
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, 200, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [])]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 2000, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 100 }));
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<NullListException>());
     }
@@ -308,9 +309,9 @@ internal class SalaryBusinessLogicContractTests
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
             .Throws(new StorageException(new InvalidOperationException()));
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 2000, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 100 }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
     }
@@ -321,27 +322,89 @@ internal class SalaryBusinessLogicContractTests
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, 200, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [])]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
             .Throws(new StorageException(new InvalidOperationException()));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
-            .Returns([new EmployeeDataModel(employeeId, "Test", "123@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
     }
 
     [Test]
-    public void CalculateSalaryByMounth_WorkerStorageThrowException_ThrowException_Test()
+    public void CalculateSalaryByMounth_EmployeeStorageThrowException_ThrowException_Test()
     {
         //Arrange
         var employeeId = Guid.NewGuid().ToString();
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
-            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, 200, DiscountType.None, 0, false, [])]);
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [])]);
         _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
-            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 2000, true, DateTime.UtcNow));
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 100 }));
         _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
             .Throws(new StorageException(new InvalidOperationException()));
         //Act&Assert
         Assert.That(() => _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow), Throws.TypeOf<StorageException>());
     }
+
+    [Test]
+    public void CalculateSalaryByMountht_WithBartenderPostConfiguration_CalculateSalary_Test()
+    {
+        //Arrange
+        var employeeId = Guid.NewGuid().ToString();
+        var rate = 2000.0;
+        var percent = 0.1;
+        var bonus = 0.5;
+        var sales = new List<SaleDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5000, 12)])
+        };
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns(sales);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new BartenderPostConfiguration() { Rate = rate, SalePercent = percent, BonusForExtraSales = bonus }));
+        _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        var sum = 0.0;
+        var expectedSum = rate + percent * (sales.Sum(x => x.Sum) / sales.Count) + sales.Where(x => x.Sum > _salaryConfigurationTest.ExtraSaleSum).Sum(x => x.Sum) * bonus;
+        _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
+            .Callback((SalaryDataModel x) =>
+            {
+                sum = x.Salary;
+            });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
+
+    [Test]
+    public void CalculateSalaryByMountht_WithManagerPostConfiguration_CalculateSalary_Test()
+    {
+        //Arrange
+        var employeeId = Guid.NewGuid().ToString();
+        var rate = 2000.0;
+        var trend = 3;
+        var bonus = 100;
+        _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .Returns([new SaleDataModel(Guid.NewGuid().ToString(), employeeId, null, DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+            .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new ManagerPostConfiguration() { Rate = rate, PersonalCountTrendPremium = bonus }));
+        _employeeStorageContract.Setup(x => x.GetList(It.IsAny<bool>(), It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns([new EmployeeDataModel(employeeId, "Test", "abc@gmail.com", Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        _employeeStorageContract.Setup(x => x.GetEmployeeTrend(It.IsAny<DateTime>(), It.IsAny<DateTime>()))
+            .Returns(trend);
+        var sum = 0.0;
+        var expectedSum = rate + trend * bonus;
+        _salaryStorageContract.Setup(x => x.AddElement(It.IsAny<SalaryDataModel>()))
+            .Callback((SalaryDataModel x) =>
+            {
+                sum = x.Salary;
+            });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMounth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
 }

SquirrelContract/SquirrelTests/BusinessLogicContractsTests/SaleBusinessLogicContractTests.cs

@@ -34,10 +34,10 @@ internal class SaleBusinessLogicContractTests
         var date = DateTime.UtcNow;
         var listOriginal = new List<SaleDataModel>()
         {
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false,
-                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false,
+                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
         };
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
         //Act
@@ -98,10 +98,10 @@ internal class SaleBusinessLogicContractTests
         var employeeId = Guid.NewGuid().ToString();
         var listOriginal = new List<SaleDataModel>()
         {
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false,
-                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false,
+                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
         };
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
         //Act
@@ -179,10 +179,10 @@ internal class SaleBusinessLogicContractTests
         var clientId = Guid.NewGuid().ToString();
         var listOriginal = new List<SaleDataModel>()
         {
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false,
-                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false,
+                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
         };
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
         //Act
@@ -260,10 +260,10 @@ internal class SaleBusinessLogicContractTests
         var cocktailId = Guid.NewGuid().ToString();
         var listOriginal = new List<SaleDataModel>()
         {
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false,
-                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
-            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false,
+                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, DiscountType.None, false, []),
         };
         _saleStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
         //Act
@@ -338,8 +338,8 @@ internal class SaleBusinessLogicContractTests
     {
         //Arrange
         var id = Guid.NewGuid().ToString();
-        var record = new SaleDataModel(id, Guid.NewGuid().ToString(), null, 10, DiscountType.None, 0, false,
-                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        var record = new SaleDataModel(id, Guid.NewGuid().ToString(), null, DiscountType.None, false,
+                [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]);
         _saleStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
         //Act
         var element = _saleBusinessLogicContract.GetSaleByData(id);
@@ -389,8 +389,8 @@ internal class SaleBusinessLogicContractTests
     {
         //Arrange
         var flag = false;
-        var record = new SaleDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.None, 10,
-            false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        var record = new SaleDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.None,
+            false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)]);
         _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>()))
             .Callback((SaleDataModel x) =>
             {
@@ -415,7 +415,7 @@ internal class SaleBusinessLogicContractTests
         _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, DiscountType.None, 10, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+            Guid.NewGuid().ToString(), DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)])), Throws.TypeOf<ElementExistsException>());
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
     }
 
@@ -431,7 +431,7 @@ internal class SaleBusinessLogicContractTests
     public void InsertSale_InvalidRecord_ThrowException_Test()
     {
         //Act&Assert
-        Assert.That(() => _saleBusinessLogicContract.InsertSale(new SaleDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.None, 10, false, [])), Throws.TypeOf<ValidationException>());
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(new SaleDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.None, false, [])), Throws.TypeOf<ValidationException>());
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Never);
     }
 
@@ -442,7 +442,7 @@ internal class SaleBusinessLogicContractTests
         _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, DiscountType.None, 10, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+            Guid.NewGuid().ToString(), DiscountType.None, false, [new SaleCocktailDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5, 1.2)])), Throws.TypeOf<StorageException>());
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
     }
 

SquirrelContract/SquirrelTests/DataModelsTests/PostDataModelTests.cs

@@ -1,6 +1,7 @@
 using SquirrelContract.DataModels;
 using SquirrelContract.Enums;
 using SquirrelContract.Exceptions;
+using SquirrelContract.Infastructure.PostConfigurations;
 
 namespace SquirrelTests.DataModelsTests;
 
@@ -10,41 +11,49 @@ internal class PostDataModelTests
     [Test]
     public void IdIsNullOrEmptyTest()
     {
-        var post = CreateDataModel(null, "name", PostType.Manager, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel(null, "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
-        post = CreateDataModel(string.Empty, "name", PostType.Manager, 10, true, DateTime.UtcNow);
+        post = CreateDataModel(string.Empty, "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void IdIsNotGuidTest()
     {
-        var post = CreateDataModel("id", "name", PostType.Manager, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel("id", "name", PostType.Bartender, new PostConfiguration() { Rate = 10 });
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void PostNameIsEmptyTest()
     {
-        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.Manager, 10, true, DateTime.UtcNow);
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.Bartender, new PostConfiguration() { Rate = 10 });
         Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
-        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, PostType.Manager, 10, true, DateTime.UtcNow);
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, PostType.Bartender, new PostConfiguration() { Rate = 10 });
         Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void PostTypeIsNoneTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.None, new PostConfiguration() { Rate = 10 });
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
-    public void SalaryIsLessOrZeroTest()
+    public void ConfigurationModelIsNullTest()
     {
-        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, 0, true, DateTime.UtcNow);
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, null);
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
-        post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Manager, -10, true, DateTime.UtcNow);
+    }
+
+
+    [Test]
+    public void RateIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = 0 });
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Bartender, new PostConfiguration() { Rate = -10 });
         Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
     }
 
@@ -53,23 +62,20 @@ internal class PostDataModelTests
     {
         var postId = Guid.NewGuid().ToString();
         var postName = "name";
-        var postType = PostType.Manager;
-        var salary = 10;
-        var isActual = false;
-        var changeDate = DateTime.UtcNow.AddDays(-1);
-        var post = CreateDataModel(postId, postName, postType, salary, isActual, changeDate);
+        var postType = PostType.Bartender;
+        var configuration = new PostConfiguration() { Rate = 10 };
+        var post = CreateDataModel(postId, postName, postType, configuration);
         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.Salary, Is.EqualTo(salary));
-            Assert.That(post.IsActual, Is.EqualTo(isActual));
-            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+            Assert.That(post.ConfigurationModel, Is.EqualTo(configuration));
+            Assert.That(post.ConfigurationModel.Rate, Is.EqualTo(configuration.Rate));
         });
     }
 
-    private static PostDataModel CreateDataModel(string? id, string? postName, PostType postType, double salary, bool isActual, DateTime changeDate) =>
-        new(id, postName, postType, salary, isActual, changeDate);
+    private static PostDataModel CreateDataModel(string? id, string? postName, PostType postType, PostConfiguration configuration) =>
+       new(id, postName, postType, configuration);
 }

SquirrelContract/SquirrelTests/DataModelsTests/SaleCocktailDataModelTests.cs

@@ -9,41 +9,50 @@ internal class SaleCocktailDataModelTests
     [Test]
     public void SaleIdIsNullOrEmptyTest()
     {
-        var saleCocktail = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        var saleCocktail = CreateDataModel(null, Guid.NewGuid().ToString(), 10, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
-        saleCocktail = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        saleCocktail = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void SaleIdIsNotGuidTest()
     {
-        var saleProduct = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
-        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        var saleCocktail = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10, 1.1);
+        Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void CocktailIdIsNullOrEmptyTest()
     {
-        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), null, 10, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
-        saleCocktail = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        saleCocktail = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
-    public void ProductIdIsNotGuidTest()
+    public void CocktailIdIsNotGuidTest()
     {
-        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), "productId", 10);
+        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), "cocktailId", 10, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void CountIsLessOrZeroTest()
     {
-        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, 1.1);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
-        saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, 1.1);
+        Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1, 0);
+        Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
+        saleCocktail = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1, -10);
         Assert.That(() => saleCocktail.Validate(), Throws.TypeOf<ValidationException>());
     }
 
@@ -53,16 +62,18 @@ internal class SaleCocktailDataModelTests
         var saleId = Guid.NewGuid().ToString();
         var cocktailId = Guid.NewGuid().ToString();
         var count = 10;
-        var saleCocktail = CreateDataModel(saleId, cocktailId, count);
+        var price = 1.2;
+        var saleCocktail = CreateDataModel(saleId, cocktailId, count, price);
         Assert.That(() => saleCocktail.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
             Assert.That(saleCocktail.SaleId, Is.EqualTo(saleId));
             Assert.That(saleCocktail.CocktailId, Is.EqualTo(cocktailId));
             Assert.That(saleCocktail.Count, Is.EqualTo(count));
+            Assert.That(saleCocktail.Price, Is.EqualTo(price));
         });
     }
 
-    private static SaleCocktailDataModel CreateDataModel(string? saleId, string? cocktailId, int count) =>
-        new(saleId, cocktailId, count);
+    private static SaleCocktailDataModel CreateDataModel(string? saleId, string? cocktailId, int count, double price) =>
+        new(saleId, cocktailId, count, price);
 }

SquirrelContract/SquirrelTests/DataModelsTests/SaleDataModelTests.cs

@@ -10,88 +10,120 @@ internal class SaleDataModelTests
     [Test]
     public void IdIsNullOrEmptyTest()
     {
-        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
-        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void IdIsNotGuidTest()
     {
-        var sale = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        var sale = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
     [Test]
     public void EmployeeIdIsNullOrEmptyTest()
     {
-        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
-        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void EmployeeIdIsNotGuidTest()
     {
-        var sale = CreateDataModel(Guid.NewGuid().ToString(), "employeeId", Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "employeeId", Guid.NewGuid().ToString(), DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void ClientIdIsNotGuidTest()
     {
-        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "clientId", 10, DiscountType.OnSale, 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, DiscountType.OnSale, 10, false, CreateSubDataModel());
-        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
-        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "clientId", DiscountType.OnSale, false, CreateSubDataModel());
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void CocktailsIsNullOrEmptyTest()
     {
-        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, null);
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.OnSale, false, null);
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
-        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, []);
+        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DiscountType.OnSale, false, []);
         Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
     }
 
+    [Test]
+    public void CalcSumAndDiscountTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var employeeId = Guid.NewGuid().ToString();
+        var clientId = Guid.NewGuid().ToString();
+        var cocktails = new List<SaleCocktailDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 2, 1.1),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1, 1.3)
+        };
+        var isCancel = false;
+        var totalSum = cocktails.Sum(x => x.Price * x.Count);
+        var saleNone = CreateDataModel(saleId, employeeId, clientId, DiscountType.None, isCancel, cocktails);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleNone.Sum, Is.EqualTo(totalSum));
+            Assert.That(saleNone.Discount, Is.EqualTo(0));
+        });
+        var saleOnSale = CreateDataModel(saleId, employeeId, clientId, DiscountType.OnSale, isCancel, cocktails);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleOnSale.Sum, Is.EqualTo(totalSum));
+            Assert.That(saleOnSale.Discount, Is.EqualTo(totalSum * 0.1));
+        });
+        var saleRegularCustomer = CreateDataModel(saleId, employeeId, clientId, DiscountType.RegularCustomer, isCancel, cocktails);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleRegularCustomer.Sum, Is.EqualTo(totalSum));
+            Assert.That(saleRegularCustomer.Discount, Is.EqualTo(totalSum * 0.5));
+        });
+        var saleCertificate = CreateDataModel(saleId, employeeId, clientId, DiscountType.Certificate, isCancel, cocktails);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleCertificate.Sum, Is.EqualTo(totalSum));
+            Assert.That(saleCertificate.Discount, Is.EqualTo(totalSum * 0.3));
+        });
+        var saleMulty = CreateDataModel(saleId, employeeId, clientId, DiscountType.Certificate | DiscountType.RegularCustomer, isCancel, cocktails);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleMulty.Sum, Is.EqualTo(totalSum));
+            Assert.That(saleMulty.Discount, Is.EqualTo(totalSum * 0.8));
+        });
+    }
+
     [Test]
     public void AllFieldsIsCorrectTest()
     {
         var saleId = Guid.NewGuid().ToString();
         var employeeId = Guid.NewGuid().ToString();
         var clientId = Guid.NewGuid().ToString();
-        var sum = 10;
         var discountType = DiscountType.Certificate;
-        var discount = 1;
         var isCancel = true;
         var cocktails = CreateSubDataModel();
-        var sale = CreateDataModel(saleId, employeeId, clientId, sum, discountType, discount, isCancel, cocktails);
+        var sale = CreateDataModel(saleId, employeeId, clientId, discountType, isCancel, cocktails);
         Assert.That(() => sale.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
             Assert.That(sale.Id, Is.EqualTo(saleId));
             Assert.That(sale.EmployeeId, Is.EqualTo(employeeId));
             Assert.That(sale.ClientId, Is.EqualTo(clientId));
-            Assert.That(sale.Sum, Is.EqualTo(sum));
             Assert.That(sale.DiscountType, Is.EqualTo(discountType));
-            Assert.That(sale.Discount, Is.EqualTo(discount));
             Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
             Assert.That(sale.Cocktails, Is.EquivalentTo(cocktails));
         });
     }
 
-    private static SaleDataModel CreateDataModel(string? id, string? employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel, List<SaleCocktailDataModel>? cocktails) =>
-        new(id, employeeId, clientId, sum, discountType, discount, isCancel, cocktails);
+    private static SaleDataModel CreateDataModel(string? id, string? employeeId, string? clientId, DiscountType discountType, bool isCancel, List<SaleCocktailDataModel>? cocktails) =>
+        new(id, employeeId, clientId, discountType, isCancel, cocktails);
 
     private static List<SaleCocktailDataModel> CreateSubDataModel()
-        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1, 1.1)];
 }

SquirrelContract/SquirrelTests/Infrastructure/ConfigurationDatabaseTest.cs

@@ -0,0 +1,10 @@
+using SquirrelContract.Infastructure;
+
+namespace SquirrelTests.Infrastructure;
+
+internal class ConfigurationDatabaseTest : IConfigurationDatabase
+{
+    public string ConnectionString =>
+    "Host=127.0.0.1;Port=5432;Database=SquirrelTest;Username=postgres;Password=postgres;";
+}
+

SquirrelContract/SquirrelTests/Infrastructure/ConfigurationSalaryTest.cs

@@ -0,0 +1,10 @@
+using SquirrelContract.Infastructure;
+
+namespace SquirrelContract.Infrastructure;
+
+class ConfigurationSalaryTest : IConfigurationSalary
+{
+	public double ExtraSaleSum => 10;
+
+    public int MaxConcurrentThreads => 4;
+}

SquirrelContract/SquirrelTests/Infrastructure/CustomWebApplicationFactory.cs

@@ -0,0 +1,31 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using SquirrelContract.Infastructure;
+
+namespace SquirrelTests.Infrastructure;
+
+internal class CustomWebApplicationFactory<TProgram> : WebApplicationFactory<TProgram>
+	where TProgram : class
+{
+	protected override void ConfigureWebHost(IWebHostBuilder builder)
+	{
+		builder.ConfigureServices(services =>
+		{
+			var databaseConfig = services.SingleOrDefault(x => x.ServiceType == typeof(IConfigurationDatabase));
+			if (databaseConfig is not null)
+				services.Remove(databaseConfig);
+
+			var loggerFactory = services.SingleOrDefault(x => x.ServiceType == typeof(LoggerFactory));
+			if (loggerFactory is not null)
+				services.Remove(loggerFactory);
+
+			services.AddSingleton<IConfigurationDatabase, ConfigurationDatabaseTest>();
+		});
+
+		builder.UseEnvironment("Development");
+
+		base.ConfigureWebHost(builder);
+	}
+}

SquirrelContract/SquirrelTests/Infrastructure/SquirrelDbContextExtensions.cs

@@ -0,0 +1,103 @@
+using SquirrelContract.Enums;
+using SquirrelDatabase;
+using SquirrelDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.Infastructure.PostConfigurations;
+
+namespace SquirrelTests.Infrastructure;
+
+internal static class SquirrelDbContextExtensions
+{
+	public static Client InsertClientToDatabaseAndReturn(this SquirrelDbContext dbContext, string? id = null, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+	{
+		var client = new Client() { Id = id ?? Guid.NewGuid().ToString(), FIO = fio, PhoneNumber = phoneNumber, DiscountSize = discountSize };
+		dbContext.Clients.Add(client);
+		dbContext.SaveChanges();
+		return client;
+	}
+
+    public static Post InsertPostToDatabaseAndReturn(this SquirrelDbContext dbContext, string? id = null, string postName = "test", PostType postType = PostType.Bartender, PostConfiguration? config = null, bool isActual = true, DateTime? changeDate = null)
+    {
+        var post = new Post() { Id = Guid.NewGuid().ToString(), PostId = id ?? Guid.NewGuid().ToString(), PostName = postName, PostType = postType, Configuration = config ?? new PostConfiguration() { Rate = 100 }, IsActual = isActual, ChangeDate = changeDate ?? DateTime.UtcNow };
+        dbContext.Posts.Add(post);
+        dbContext.SaveChanges();
+        return post;
+    }
+
+    public static Cocktail InsertCocktailToDatabaseAndReturn(this SquirrelDbContext dbContext, string? id = null, string cocktailName = "test", AlcoholType baseAlcohol = AlcoholType.Vodka, double price = 1)
+	{
+		var cocktail = new Cocktail() { Id = id ?? Guid.NewGuid().ToString(), CocktailName = cocktailName, BaseAlcohol = baseAlcohol, Price = price };
+		dbContext.Cocktails.Add(cocktail);
+		dbContext.SaveChanges();
+		return cocktail;
+	}
+
+	public static CocktailHistory InsertCocktailHistoryToDatabaseAndReturn(this SquirrelDbContext dbContext, string cocktailId, double price = 10, DateTime? changeDate = null)
+	{
+		var cocktailHistory = new CocktailHistory() { Id = Guid.NewGuid().ToString(), CocktailId = cocktailId, OldPrice = price, ChangeDate = changeDate ?? DateTime.UtcNow };
+		dbContext.CocktailHistories.Add(cocktailHistory);
+		dbContext.SaveChanges();
+		return cocktailHistory;
+	}
+
+	public static Salary InsertSalaryToDatabaseAndReturn(this SquirrelDbContext dbContext, string employeeId, double employeeSalary = 1, DateTime? salaryDate = null)
+	{
+		var salary = new Salary() { EmployeeId = employeeId, EmployeeSalary = employeeSalary, SalaryDate = salaryDate ?? DateTime.UtcNow };
+		dbContext.Salaries.Add(salary);
+		dbContext.SaveChanges();
+		return salary;
+	}
+
+	public static Sale InsertSaleToDatabaseAndReturn(this SquirrelDbContext dbContext, string employeeId, string? clientId = null, DateTime? saleDate = null, double sum = 1, DiscountType discountType = DiscountType.None, double discount = 0, bool isCancel = false, List<(string, int, double)>? cocktails = null)
+	{
+		var sale = new Sale() { EmployeeId = employeeId, ClientId = clientId, SaleDate = saleDate ?? DateTime.UtcNow, Sum = sum, DiscountType = discountType, Discount = discount, IsCancel = isCancel, SaleCocktails = [] };
+		if (cocktails is not null)
+		{
+			foreach (var elem in cocktails)
+			{
+				sale.SaleCocktails.Add(new SaleCocktail { CocktailId = elem.Item1, SaleId = sale.Id, Count = elem.Item2, Price = elem.Item3 });
+			}
+		}
+		dbContext.Sales.Add(sale);
+		dbContext.SaveChanges();
+		return sale;
+	}
+
+    public static Employee InsertEmployeeToDatabaseAndReturn(this SquirrelDbContext dbContext, string? id = null, string fio = "test", string email = "abc@gmail.com", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false, DateTime? dateDelete = null)
+    {
+        var worker = new Employee() { Id = id ?? Guid.NewGuid().ToString(), FIO = fio, Email = email, PostId = postId ?? Guid.NewGuid().ToString(), BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20), EmploymentDate = employmentDate ?? DateTime.UtcNow, IsDeleted = isDeleted, DateOfDelete = dateDelete };
+        dbContext.Employees.Add(worker);
+        dbContext.SaveChanges();
+        return worker;
+    }
+
+    public static Client? GetClientFromDatabase(this SquirrelDbContext dbContext, string id) => dbContext.Clients.FirstOrDefault(x => x.Id == id);
+
+	public static Post? GetPostFromDatabaseByPostId(this SquirrelDbContext dbContext, string id) => dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual);
+
+	public static Post[] GetPostsFromDatabaseByPostId(this SquirrelDbContext dbContext, string id) => [.. dbContext.Posts.Where(x => x.PostId == id).OrderByDescending(x => x.ChangeDate)];
+
+	public static Cocktail? GetCocktailFromDatabaseById(this SquirrelDbContext dbContext, string id) => dbContext.Cocktails.FirstOrDefault(x => x.Id == id);
+
+	public static Salary[] GetSalariesFromDatabaseByEmployeeId(this SquirrelDbContext dbContext, string id) => [.. dbContext.Salaries.Where(x => x.EmployeeId == id)];
+
+	public static Sale? GetSaleFromDatabaseById(this SquirrelDbContext dbContext, string id) => dbContext.Sales.Include(x => x.SaleCocktails).FirstOrDefault(x => x.Id == id);
+
+	public static Sale[] GetSalesByClientId(this SquirrelDbContext dbContext, string? clientId) => [.. dbContext.Sales.Include(x => x.SaleCocktails).Where(x => x.ClientId == clientId)];
+
+	public static Employee? GetEmployeeFromDatabaseById(this SquirrelDbContext dbContext, string id) => dbContext.Employees.FirstOrDefault(x => x.Id == id);
+
+	public static void RemoveClientsFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Clients\" CASCADE;");
+
+	public static void RemovePostsFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Posts\" CASCADE;");
+
+	public static void RemoveCocktailsFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Cocktails\" CASCADE;");
+
+	public static void RemoveSalariesFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Salaries\" CASCADE;");
+
+	public static void RemoveSalesFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+
+	public static void RemoveEmployeesFromDatabase(this SquirrelDbContext dbContext) => dbContext.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+
+	private static void ExecuteSqlRaw(this SquirrelDbContext dbContext, string command) => dbContext.Database.ExecuteSqlRaw(command);
+}

SquirrelContract/SquirrelTests/SquirrelTests.csproj

@@ -10,16 +10,20 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.3" />
     <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" />
+    <PackageReference Include="Serilog" Version="4.2.0" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\SquirrelBusinessLogic\SquirrelBusinessLogic.csproj" />
     <ProjectReference Include="..\SquirrelContract\SquirrelContract.csproj" />
+    <ProjectReference Include="..\SquirrelDatabase\SquirrelDatabase.csproj" />
+    <ProjectReference Include="..\SquirrelWebApi\SquirrelWebApi.csproj" />
   </ItemGroup>
 
   <ItemGroup>

SquirrelContract/SquirrelTests/StorageContracts/BaseStorageContractTest.cs

@@ -0,0 +1,25 @@
+using SquirrelTests.Infrastructure;
+using SquirrelDatabase;
+
+namespace SquirrelTests.StoragesContracts;
+
+internal abstract class BaseStorageContractTest
+{
+	protected SquirrelDbContext SquirrelDbContext { get; private set; }
+
+	[OneTimeSetUp]
+	public void OneTimeSetUp()
+	{
+		SquirrelDbContext = new SquirrelDbContext(new ConfigurationDatabaseTest());
+
+		SquirrelDbContext.Database.EnsureDeleted();
+		SquirrelDbContext.Database.EnsureCreated();
+	}
+
+	[OneTimeTearDown]
+	public void OneTimeTearDown()
+	{
+		SquirrelDbContext.Database.EnsureDeleted();
+		SquirrelDbContext.Dispose();
+	}
+}

SquirrelContract/SquirrelTests/StorageContracts/ClientStorageContractTests.cs

@@ -0,0 +1,205 @@
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Exceptions;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.StoragesContracts;
+using SquirrelTests.StoragesContracts;
+using SquirrelTests.Infrastructure;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class ClientStorageContractTests : BaseStorageContractTest
+{
+	private IClientStorageContract _clientStorageContract;
+
+	[SetUp]
+	public void SetUp()
+	{
+		_clientStorageContract = new ClientStorageContract(SquirrelDbContext);
+	}
+
+	[TearDown]
+	public void TearDown()
+	{
+        SquirrelDbContext.RemoveSalesFromDatabase();
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+        SquirrelDbContext.RemoveClientsFromDatabase();
+    }
+
+	[Test]
+	public void Try_GetList_WhenHaveRecords_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+5-555-555-55-55");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+6-666-666-66-66");
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+7-777-777-77-77");
+		var list = _clientStorageContract.GetList();
+		Assert.That(list, Is.Not.Null);
+		Assert.That(list, Has.Count.EqualTo(3));
+		AssertElement(list.First(x => x.Id == client.Id), client);
+	}
+
+	[Test]
+	public void Try_GetList_WhenNoRecords_Test()
+	{
+		var list = _clientStorageContract.GetList();
+		Assert.That(list, Is.Not.Null);
+		Assert.That(list, Is.Empty);
+	}
+
+	[Test]
+	public void Try_GetElementById_WhenHaveRecord_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		AssertElement(_clientStorageContract.GetElementById(client.Id), client);
+	}
+
+	[Test]
+	public void Try_GetElementById_WhenNoRecord_Test()
+	{
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		Assert.That(() => _clientStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+	}
+
+	[Test]
+	public void Try_GetElementByFIO_WhenHaveRecord_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		AssertElement(_clientStorageContract.GetElementByFIO(client.FIO), client);
+	}
+
+	[Test]
+	public void Try_GetElementByFIO_WhenNoRecord_Test()
+	{
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		Assert.That(() => _clientStorageContract.GetElementByFIO("New Fio"), Is.Null);
+	}
+
+	[Test]
+	public void Try_GetElementByPhoneNumber_WhenHaveRecord_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		AssertElement(_clientStorageContract.GetElementByPhoneNumber(client.PhoneNumber), client);
+	}
+
+	[Test]
+	public void Try_GetElementByPhoneNumber_WhenNoRecord_Test()
+	{
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		Assert.That(() => _clientStorageContract.GetElementByPhoneNumber("+8-888-888-88-88"), Is.Null);
+	}
+
+	[Test]
+	public void Try_AddElement_Test()
+	{
+		var client = CreateModel(Guid.NewGuid().ToString());
+		_clientStorageContract.AddElement(client);
+		AssertElement(SquirrelDbContext.GetClientFromDatabase(client.Id), client);
+	}
+
+	[Test]
+	public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+	{
+		var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(client.Id);
+		Assert.That(() => _clientStorageContract.AddElement(client), Throws.TypeOf<ElementExistsException>());
+	}
+
+	[Test]
+	public void Try_AddElement_WhenHaveRecordWithSamePhoneNumber_Test()
+	{
+		var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: client.PhoneNumber);
+		Assert.That(() => _clientStorageContract.AddElement(client), Throws.TypeOf<ElementExistsException>());
+	}
+
+	[Test]
+	public void Try_UpdElement_Test()
+	{
+		var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(client.Id);
+		_clientStorageContract.UpdElement(client);
+		AssertElement(SquirrelDbContext.GetClientFromDatabase(client.Id), client);
+	}
+
+	[Test]
+	public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+	{
+		Assert.That(() => _clientStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+	}
+
+	[Test]
+	public void Try_UpdElement_WhenHaveRecordWithSamePhoneNumber_Test()
+	{
+		var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(client.Id, phoneNumber: "+7-777-777-77-77");
+		SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: client.PhoneNumber);
+		Assert.That(() => _clientStorageContract.UpdElement(client), Throws.TypeOf<ElementExistsException>());
+	}
+
+	[Test]
+	public void Try_DelElement_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		_clientStorageContract.DelElement(client.Id);
+		var element = SquirrelDbContext.GetClientFromDatabase(client.Id);
+		Assert.That(element, Is.Null);
+	}
+
+	[Test]
+	public void Try_DelElement_WhenHaveSalesByThisClient_Test()
+	{
+		var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+		var employeeId = Guid.NewGuid().ToString();
+		SquirrelDbContext.Employees.Add(new Employee() { Id = employeeId, FIO = "test", PostId = Guid.NewGuid().ToString(), Email = "abc@gmail.com" });
+		SquirrelDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+		SquirrelDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+		SquirrelDbContext.SaveChanges();
+		var salesBeforeDelete = SquirrelDbContext.Sales.Where(x => x.ClientId == client.Id).ToArray();
+		_clientStorageContract.DelElement(client.Id);
+		var element = SquirrelDbContext.GetClientFromDatabase(client.Id);
+		var salesAfterDelete = SquirrelDbContext.Sales.Where(x => x.ClientId == client.Id).ToArray();
+		Assert.Multiple(() =>
+		{
+			Assert.That(element, Is.Null);
+			Assert.That(salesBeforeDelete, Has.Length.EqualTo(2));
+			Assert.That(salesAfterDelete, Is.Empty);
+			Assert.That(SquirrelDbContext.Sales.Count(), Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public void Try_DelElement_WhenNoRecordWithThisId_Test()
+	{
+		Assert.That(() => _clientStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+	}
+
+	private static void AssertElement(ClientDataModel? actual, Client expected)
+	{
+		Assert.That(actual, Is.Not.Null);
+		Assert.Multiple(() =>
+		{
+			Assert.That(actual.Id, Is.EqualTo(expected.Id));
+			Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+			Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+			Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+		});
+	}
+
+	private static ClientDataModel CreateModel(string id, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+		=> new(id, fio, phoneNumber, discountSize);
+
+	private static void AssertElement(Client? actual, ClientDataModel expected)
+	{
+		Assert.That(actual, Is.Not.Null);
+		Assert.Multiple(() =>
+		{
+			Assert.That(actual.Id, Is.EqualTo(expected.Id));
+			Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+			Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+			Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+		});
+	}
+}

SquirrelContract/SquirrelTests/StorageContracts/CocktailStorageContractTests.cs

@@ -0,0 +1,190 @@
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Exceptions;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using SquirrelTests.Infrastructure;
+using SquirrelTests.StoragesContracts;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class CocktailStorageContractTests : BaseStorageContractTest
+{
+    private CocktailStorageContract _cocktailStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _cocktailStorageContract = new CocktailStorageContract(SquirrelDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveCocktailsFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 2");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 3");
+        var list = _cocktailStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == cocktail.Id), cocktail);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _cocktailStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetHistoryByCocktailId_WhenHaveRecords_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 20, DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _cocktailStorageContract.GetHistoryByCocktailId(cocktail.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+    }
+
+    [Test]
+    public void Try_GetHistoryByCocktailId_WhenNoRecords_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 20, DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _cocktailStorageContract.GetHistoryByCocktailId(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_cocktailStorageContract.GetElementById(cocktail.Id), cocktail);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _cocktailStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_cocktailStorageContract.GetElementByName(cocktail.CocktailName), cocktail);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _cocktailStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var cocktail = CreateModel(Guid.NewGuid().ToString());
+        _cocktailStorageContract.AddElement(cocktail);
+        AssertElement(SquirrelDbContext.GetCocktailFromDatabaseById(cocktail.Id), cocktail);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var cocktail = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktail.Id, cocktailName: "name unique");
+        Assert.That(() => _cocktailStorageContract.AddElement(cocktail), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var cocktail = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString(), cocktailName: cocktail.CocktailName);
+        Assert.That(() => _cocktailStorageContract.AddElement(cocktail), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var cocktail = CreateModel(Guid.NewGuid().ToString(), "new name", AlcoholType.Vodka);
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktail.Id);
+        _cocktailStorageContract.UpdElement(cocktail);
+        AssertElement(SquirrelDbContext.GetCocktailFromDatabaseById(cocktail.Id), cocktail);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _cocktailStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var cocktail = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktail.Id, cocktailName: "name");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: cocktail.CocktailName);
+        Assert.That(() => _cocktailStorageContract.UpdElement(cocktail), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _cocktailStorageContract.DelElement(cocktail.Id);
+        var element = SquirrelDbContext.GetCocktailFromDatabaseById(cocktail.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _cocktailStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+    private static void AssertElement(CocktailDataModel? actual, Cocktail expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.CocktailName, Is.EqualTo(expected.CocktailName));
+            Assert.That(actual.BaseAlcohol, Is.EqualTo(expected.BaseAlcohol));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+
+    private static CocktailDataModel CreateModel(string id, string cocktailName = "test", AlcoholType baseAlcohol = AlcoholType.Beer, double price = 1)
+        => new(id, cocktailName, price, baseAlcohol);
+
+    private static void AssertElement(Cocktail? actual, CocktailDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.CocktailName, Is.EqualTo(expected.CocktailName));
+            Assert.That(actual.BaseAlcohol, Is.EqualTo(expected.BaseAlcohol));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+}

SquirrelContract/SquirrelTests/StorageContracts/EmployeeStorageContractTests.cs

@@ -0,0 +1,258 @@
+using Microsoft.EntityFrameworkCore;
+
+using SquirrelContract.Exceptions;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using SquirrelContract.DataModels;
+using SquirrelTests.StoragesContracts;
+using System.ComponentModel.DataAnnotations;
+using SquirrelTests.Infrastructure;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class EmployeeStorageContractTests : BaseStorageContractTest
+{
+    private EmployeeStorageContract _workerStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _workerStorageContract = new EmployeeStorageContract(SquirrelDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com");
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com");
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com");
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPostId_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: postId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: postId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3");
+        var list = _workerStorageContract.GetList(postId: postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.PostId == postId));
+    }
+
+    [Test]
+    public void Try_GetList_ByBirthDate_Test()
+    {
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-25));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-21));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-20));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-19));
+        var list = _workerStorageContract.GetList(fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByEmploymentDate_Test()
+    {
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(-2));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(1));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(2));
+        var list = _workerStorageContract.GetList(fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: postId, birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: postId, birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", postId: postId, birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 4", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
+        var list = _workerStorageContract.GetList(postId: postId, fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1), fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_workerStorageContract.GetElementById(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_workerStorageContract.GetElementByFIO(employee.FIO), employee);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        _workerStorageContract.AddElement(employee);
+        AssertElement(SquirrelDbContext.GetEmployeeFromDatabaseById(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employee.Id);
+        Assert.That(() => _workerStorageContract.AddElement(employee), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString(), "New Fio");
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employee.Id);
+        _workerStorageContract.UpdElement(employee);
+        AssertElement(SquirrelDbContext.GetEmployeeFromDatabaseById(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.UpdElement(employee), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _workerStorageContract.DelElement(employee.Id);
+        var element = SquirrelDbContext.GetEmployeeFromDatabaseById(employee.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.IsDeleted);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.DelElement(employee.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_GetEmployeeTrend_WhenNoNewAndDeletedEmployees_Test()
+    {
+        var startDate = DateTime.UtcNow.AddDays(-5);
+        var endDate = DateTime.UtcNow.AddDays(-3);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10), isDeleted: true, dateDelete: DateTime.UtcNow.AddDays(-9));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10), isDeleted: true, dateDelete: DateTime.UtcNow.AddDays(-1));
+        var count = _workerStorageContract.GetEmployeeTrend(startDate, endDate);
+        Assert.That(count, Is.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetEmployeeTrend_WhenHaveNewAndNoDeletedEmployees_Test()
+    {
+        var startDate = DateTime.UtcNow.AddDays(-5);
+        var endDate = DateTime.UtcNow.AddDays(-3);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-4));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-1));
+        var count = _workerStorageContract.GetEmployeeTrend(startDate, endDate);
+        Assert.That(count, Is.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetEmployeeTrend_WhenNoNewAndHaveDeletedEmployees_Test()
+    {
+        var startDate = DateTime.UtcNow.AddDays(-5);
+        var endDate = DateTime.UtcNow.AddDays(-3);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10), isDeleted: true, dateDelete: DateTime.UtcNow.AddDays(-9));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10), isDeleted: true, dateDelete: DateTime.UtcNow.AddDays(-4));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employmentDate: DateTime.UtcNow.AddDays(-10), isDeleted: true, dateDelete: DateTime.UtcNow.AddDays(-1));
+        var count = _workerStorageContract.GetEmployeeTrend(startDate, endDate);
+        Assert.That(count, Is.EqualTo(-1));
+    }
+
+    private static void AssertElement(EmployeeDataModel? actual, Employee expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static EmployeeDataModel CreateModel(string id, string fio = "fio", string email = "abc@mail.ru", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false) =>
+        new(id, fio, email, postId ?? Guid.NewGuid().ToString(), birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow, isDeleted);
+
+    private static void AssertElement(Employee? actual, EmployeeDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));  
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+            Assert.That(actual.DateOfDelete.HasValue, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+}

SquirrelContract/SquirrelTests/StorageContracts/PostStorageContractTests.cs

@@ -0,0 +1,329 @@
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Exceptions;
+using SquirrelContract.Infastructure.PostConfigurations;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using SquirrelTests.Infrastructure;
+using SquirrelTests.StoragesContracts;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class PostStorageContractTests : BaseStorageContractTest
+{
+    private PostStorageContract _postStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _postStorageContract = new PostStorageContract(SquirrelDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemovePostsFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 2");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 3");
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_WhenDifferentConfigTypes_Test()
+    {
+        var postSimple = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        var postBuilder = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 2", config: new BartenderPostConfiguration() { SalePercent = 500 });
+        var postLoader = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 3", config: new ManagerPostConfiguration() { PersonalCountTrendPremium = 20 });
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        AssertElement(list.First(x => x.Id == postSimple.PostId), postSimple);
+        AssertElement(list.First(x => x.Id == postBuilder.PostId), postBuilder);
+        AssertElement(list.First(x => x.Id == postLoader.PostId), postLoader);
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenHaveRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenNoRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        AssertElement(_postStorageContract.GetElementById(post.PostId), post);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordWasDeleted_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostId), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenTrySearchById_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementById(post.Id), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        AssertElement(_postStorageContract.GetElementByName(post.PostName), post);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        Assert.That(() => _postStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenRecordWasDeleted_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostName), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        _postStorageContract.AddElement(post);
+        AssertElement(SquirrelDbContext.GetPostFromDatabaseByPostId(post.Id), post);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: post.PostName, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSamePostId_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WithBartenderPostConfiguration_Test()
+    {
+        var salePercent = 10;
+        var post = CreateModel(Guid.NewGuid().ToString(), config: new BartenderPostConfiguration() { SalePercent = salePercent });
+        _postStorageContract.AddElement(post);
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(post.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(BartenderPostConfiguration).Name));
+            Assert.That((element.Configuration as BartenderPostConfiguration)!.SalePercent, Is.EqualTo(salePercent));
+        });
+    }
+
+    [Test]
+    public void Try_AddElement_WithLoaderPostConfiguration_Test()
+    {
+        var trendPremium = 20;
+        var post = CreateModel(Guid.NewGuid().ToString(), config: new ManagerPostConfiguration() { PersonalCountTrendPremium = trendPremium });
+        _postStorageContract.AddElement(post);
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(post.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(ManagerPostConfiguration).Name));
+            Assert.That((element.Configuration as ManagerPostConfiguration)!.PersonalCountTrendPremium, Is.EqualTo(trendPremium));
+        });
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        _postStorageContract.UpdElement(post);
+        var posts = SquirrelDbContext.GetPostsFromDatabaseByPostId(post.Id);
+        Assert.That(posts, Is.Not.Null);
+        Assert.That(posts, Has.Length.EqualTo(2));
+        AssertElement(posts[0], CreateModel(post.Id));
+        AssertElement(posts[^1], CreateModel(post.Id));
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "New Name");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(post.Id, postName: "name");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: post.PostName);
+        Assert.That(() => _postStorageContract.UpdElement(post), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenRecordWasDeleted_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(post.Id, isActual: false);
+        Assert.That(() => _postStorageContract.UpdElement(post), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WithBartenderPostConfiguration_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        var salePercent = 10;
+        _postStorageContract.UpdElement(CreateModel(post.PostId, config: new BartenderPostConfiguration() { SalePercent = salePercent }));
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(post.PostId);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(BartenderPostConfiguration).Name));
+            Assert.That((element.Configuration as BartenderPostConfiguration)!.SalePercent, Is.EqualTo(salePercent));
+        });
+    }
+
+    [Test]
+    public void Try_UpdElement_WithLoaderPostConfiguration_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        var trendPremium = 20;
+        _postStorageContract.UpdElement(CreateModel(post.PostId, config: new ManagerPostConfiguration() { PersonalCountTrendPremium = trendPremium }));
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(post.PostId);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(ManagerPostConfiguration).Name));
+            Assert.That((element.Configuration as ManagerPostConfiguration)!.PersonalCountTrendPremium, Is.EqualTo(trendPremium));
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: true);
+        _postStorageContract.DelElement(post.PostId);
+        Assert.That(SquirrelDbContext.GetPostFromDatabaseByPostId(post.PostId), Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasDeleted_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        Assert.That(() => _postStorageContract.DelElement(post.PostId), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_ResElement_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        _postStorageContract.ResElement(post.PostId);
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(post.PostId);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsActual);
+        });
+    }
+
+    [Test]
+    public void Try_ResElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.ResElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_ResElement_WhenRecordNotWasDeleted_Test()
+    {
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: true);
+        Assert.That(() => _postStorageContract.ResElement(post.PostId), Throws.Nothing);
+    }
+
+    private static void AssertElement(PostDataModel? actual, Post expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.PostId));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.ConfigurationModel.Rate, Is.EqualTo(expected.Configuration.Rate));
+        });
+    }
+
+    private static PostDataModel CreateModel(string postId, string postName = "test", PostType postType = PostType.Bartender, PostConfiguration? config = null)
+        => new(postId, postName, postType, config ?? new PostConfiguration() { Rate = 100 });
+
+    private static void AssertElement(Post? actual, PostDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.PostId, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.Configuration.Rate, Is.EqualTo(expected.ConfigurationModel.Rate));
+        });
+    }
+}

SquirrelContract/SquirrelTests/StorageContracts/SalaryStorageContractTests.cs

@@ -0,0 +1,133 @@
+using BarBelochkaContract.DataModels;
+using Microsoft.EntityFrameworkCore;
+using SquirrelContract.StoragesContracts;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using SquirrelTests.Infrastructure;
+using SquirrelTests.StoragesContracts;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class SalaryStorageContractTests : BaseStorageContractTest
+{
+    private SalaryStorageContract _salaryStorageContract;
+    private Employee _employee;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract = new SalaryStorageContract(SquirrelDbContext);
+        _employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveSalariesFromDatabase();
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var salary = SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, employeeSalary: 100);
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id);
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.Single(x => x.Salary == salary.EmployeeSalary), salary);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyInDatePeriod_Test()
+    {
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployee_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn("name 2");
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id);
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id);
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(employee.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployeeOnlyInDatePeriod_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "name 2");
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        SquirrelDbContext.InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+        });
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var salary = CreateModel(_employee.Id);
+        _salaryStorageContract.AddElement(salary);
+        AssertElement(SquirrelDbContext.GetSalariesFromDatabaseByEmployeeId(_employee.Id).First(), salary);
+    }
+
+    private static void AssertElement(SalaryDataModel? actual, Salary expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.Salary, Is.EqualTo(expected.EmployeeSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateModel(string employeeId, double employeeSalary = 1, DateTime? salaryDate = null)
+        => new(employeeId, salaryDate ?? DateTime.UtcNow, employeeSalary);
+
+    private static void AssertElement(Salary? actual, SalaryDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.EmployeeSalary, Is.EqualTo(expected.Salary));
+        });
+    }
+}

SquirrelContract/SquirrelTests/StorageContracts/SaleStorageContractTests.cs

@@ -0,0 +1,261 @@
+using SquirrelContract.DataModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Exceptions;
+using SquirrelDatabase.Implementations;
+using SquirrelDatabase.Models;
+using SquirrelTests.StoragesContracts;
+using SquirrelTests.Infrastructure;
+
+namespace SquirrelTests.StorageContracts;
+
+[TestFixture]
+internal class SaleStorageContractTests : BaseStorageContractTest
+{
+    private SaleStorageContract _saletStorageContract;
+    private Client _client;
+    private Employee _employee;
+    private Cocktail _cocktail;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _saletStorageContract = new SaleStorageContract(SquirrelDbContext);
+        _client = SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        _employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        _cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveSalesFromDatabase();
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+        SquirrelDbContext.RemoveClientsFromDatabase();
+        SquirrelDbContext.RemoveCocktailsFromDatabase();
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var sale = SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 5, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, cocktails: [(_cocktail.Id, 10, 1.2)]);
+        var list = _saletStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _saletStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPeriod_Test()
+    {
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployeeId_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "Other employee");
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, null, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(employeeId: _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByClientId_Test()
+    {
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(fio: "Other fio", phoneNumber: "+8-888-888-88-88");
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(clientId: _client.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.ClientId == _client.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByCocktailId_Test()
+    {
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: "Other name");
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 5, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2), (cocktail.Id, 4, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, cocktails: [(cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, null, cocktails: [(cocktail.Id, 1, 1.2), (_cocktail.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(cocktailId: _cocktail.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        Assert.That(list.All(x => x.Cocktails!.Any(y => y.CocktailId == _cocktail.Id)));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "Other employee");
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(fio: "Other fio", phoneNumber: "+8-888-888-88-88");
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: "Other name");
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), cocktails: [(cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), cocktails: [(cocktail.Id, 1, 1.2)]);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), cocktails: [(_cocktail.Id, 1, 1.2)]);
+        var list = _saletStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1), employeeId: _employee.Id, clientId: _client.Id, cocktailId: cocktail.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var sale = SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        AssertElement(_saletStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)]);
+        Assert.That(() => _saletStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordHasCanceled_Test()
+    {
+        var sale = SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)], isCancel: true);
+        AssertElement(_saletStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, DiscountType.RegularCustomer, false, [_cocktail.Id]);
+        _saletStorageContract.AddElement(sale);
+        AssertElement(SquirrelDbContext.GetSaleFromDatabaseById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenIsDeletedIsTrue_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, DiscountType.RegularCustomer, true, [_cocktail.Id]);
+        Assert.That(() => _saletStorageContract.AddElement(sale), Throws.Nothing);
+        AssertElement(SquirrelDbContext.GetSaleFromDatabaseById(sale.Id), CreateModel(sale.Id, _employee.Id, _client.Id, DiscountType.RegularCustomer, false, [_cocktail.Id]));
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var sale = SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)], isCancel: false);
+        _saletStorageContract.DelElement(sale.Id);
+        var element = SquirrelDbContext.GetSaleFromDatabaseById(sale.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsCancel);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _saletStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasCanceled_Test()
+    {
+        var sale = SquirrelDbContext.InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, cocktails: [(_cocktail.Id, 1, 1.2)], isCancel: true);
+        Assert.That(() => _saletStorageContract.DelElement(sale.Id), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    private static void AssertElement(SaleDataModel? actual, Sale expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.ClientId, Is.EqualTo(expected.ClientId));
+            Assert.That(actual.DiscountType, Is.EqualTo(expected.DiscountType));
+            Assert.That(actual.Discount, Is.EqualTo(expected.Discount));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.SaleCocktails is not null)
+        {
+            Assert.That(actual.Cocktails, Is.Not.Null);
+            Assert.That(actual.Cocktails, Has.Count.EqualTo(expected.SaleCocktails.Count));
+            for (int i = 0; i < actual.Cocktails.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Cocktails[i].CocktailId, Is.EqualTo(expected.SaleCocktails[i].CocktailId));
+                    Assert.That(actual.Cocktails[i].Count, Is.EqualTo(expected.SaleCocktails[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Cocktails, Is.Null);
+        }
+    }
+
+    private static SaleDataModel CreateModel(string id, string employeeId, string? clientId, DiscountType discountType, bool isCancel, List<string> cocktailIds)
+    {
+        var cocktails = cocktailIds.Select(x => new SaleCocktailDataModel(id, x, 1, 1.1)).ToList();
+        return new(id, employeeId, clientId, discountType, isCancel, cocktails);
+    }
+
+    private static void AssertElement(Sale? actual, SaleDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.ClientId, Is.EqualTo(expected.ClientId));
+            Assert.That(actual.DiscountType, Is.EqualTo(expected.DiscountType));
+            Assert.That(actual.Discount, Is.EqualTo(expected.Discount));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.Cocktails is not null)
+        {
+            Assert.That(actual.SaleCocktails, Is.Not.Null);
+            Assert.That(actual.SaleCocktails, Has.Count.EqualTo(expected.Cocktails.Count));
+            for (int i = 0; i < actual.SaleCocktails.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.SaleCocktails[i].CocktailId, Is.EqualTo(expected.Cocktails[i].CocktailId));
+                    Assert.That(actual.SaleCocktails[i].Count, Is.EqualTo(expected.Cocktails[i].Count));
+                    Assert.That(actual.SaleCocktails[i].Price, Is.EqualTo(expected.Cocktails[i].Price));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.SaleCocktails, Is.Null);
+        }
+    }
+}

SquirrelContract/SquirrelTests/WebApiControllersTests/BaseWebApiControllerTest.cs

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

SquirrelContract/SquirrelTests/WebApiControllersTests/ClientControllerTests.cs

@@ -0,0 +1,371 @@
+using System.Net;
+using System;
+using SquirrelContract.ViewModels;
+using SquirrelTests.Infrastructure;
+using SquirrelDatabase.Models;
+using SquirrelContract.BindingModels;
+
+namespace SquirrelTests.WebApiControllersTests;
+
+[TestFixture]
+internal class ClientControllerTests : BaseWebApiControllerTest
+{
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveSalesFromDatabase();
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+        SquirrelDbContext.RemoveClientsFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn(phoneNumber: "+5-555-555-55-55");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(phoneNumber: "+6-666-666-66-66");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(phoneNumber: "+7-777-777-77-77");
+        //Act
+        var response = await HttpClient.GetAsync("/api/clients");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<ClientViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == client.Id), client);
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync("/api/clients");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<ClientViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/{client.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<ClientViewModel>(response), client);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/{client.FIO}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<ClientViewModel>(response), client);
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/New%20Fio");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByPhoneNumber_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/{client.PhoneNumber}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<ClientViewModel>(response), client);
+    }
+
+    [Test]
+    public async Task GetElement_ByPhoneNumber_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/clients/+8-888-888-88-88");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        var clientModel = CreateBindingModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(SquirrelDbContext.GetClientFromDatabase(clientModel.Id!), clientModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModel = CreateBindingModel();
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(clientModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSamePhoneNumber_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModel = CreateBindingModel();
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(phoneNumber: clientModel.PhoneNumber!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModelWithIdIncorrect = new ClientBindingModel { Id = "Id", FIO = "fio", PhoneNumber = "+7-111-111-11-11", DiscountSize = 10 };
+        var clientModelWithFioIncorrect = new ClientBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, PhoneNumber = "+7-111-111-11-11", DiscountSize = 10 };
+        var clientModelWithPhoneNumberIncorrect = new ClientBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", PhoneNumber = "71", DiscountSize = 10 };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModelWithFioIncorrect));
+        var responseWithPhoneNumberIncorrect = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModelWithPhoneNumberIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithPhoneNumberIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PhoneNumber is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var clientModel = CreateBindingModel(fio: "new fio");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(clientModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        AssertElement(SquirrelDbContext.GetClientFromDatabase(clientModel.Id!), clientModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModel = CreateBindingModel(fio: "new fio");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSamePhoneNumber_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModel = CreateBindingModel(fio: "new fio");
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(clientModel.Id);
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(phoneNumber: clientModel.PhoneNumber!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/clients", MakeContent(clientModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var clientModelWithIdIncorrect = new ClientBindingModel { Id = "Id", FIO = "fio", PhoneNumber = "+7-111-111-11-11", DiscountSize = 10 };
+        var clientModelWithFioIncorrect = new ClientBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, PhoneNumber = "+7-111-111-11-11", DiscountSize = 10 };
+        var clientModelWithPhoneNumberIncorrect = new ClientBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", PhoneNumber = "71", DiscountSize = 10 };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/clients", MakeContent(clientModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PutAsync($"/api/clients", MakeContent(clientModelWithFioIncorrect));
+        var responseWithPhoneNumberIncorrect = await HttpClient.PutAsync($"/api/clients", MakeContent(clientModelWithPhoneNumberIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithPhoneNumberIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PhoneNumber is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/clients", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/clients", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var clientId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertClientToDatabaseAndReturn(clientId);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/clients/{clientId}");
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(SquirrelDbContext.GetClientFromDatabase(clientId), Is.Null);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenHaveSalesByThisClient_ShouldSuccess_Test()
+    {
+        //Arrange
+        var client = SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, client.Id);
+        SquirrelDbContext.InsertSaleToDatabaseAndReturn(employee.Id, client.Id);
+        var salesBeforeDelete = SquirrelDbContext.GetSalesByClientId(client.Id);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/clients/{client.Id}");
+        //Assert
+        SquirrelDbContext.ChangeTracker.Clear();
+        var element = SquirrelDbContext.GetClientFromDatabase(client.Id);
+        var salesAfterDelete = SquirrelDbContext.GetSalesByClientId(client.Id);
+        var salesNoClients = SquirrelDbContext.GetSalesByClientId(null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(element, Is.Null);
+            Assert.That(salesBeforeDelete, Has.Length.EqualTo(2));
+            Assert.That(salesAfterDelete, Is.Empty);
+            Assert.That(salesNoClients, Has.Length.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertClientToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/clients/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/clients/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(ClientViewModel? actual, Client expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+            Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+        });
+    }
+
+    private static ClientBindingModel CreateBindingModel(string? id = null, string fio = "fio", string phoneNumber = "+7-666-666-66-66", double discountSize = 10) =>
+        new()
+        {
+            Id = id ?? Guid.NewGuid().ToString(),
+            FIO = fio,
+            PhoneNumber = phoneNumber,
+            DiscountSize = discountSize
+        };
+
+    private static void AssertElement(Client? actual, ClientBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+            Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+        });
+    }
+}

SquirrelContract/SquirrelTests/WebApiControllersTests/CocktailControllerTests.cs

@@ -0,0 +1,384 @@
+using static NUnit.Framework.Internal.OSPlatform;
+using System.Net;
+using SquirrelTests.Infrastructure;
+using SquirrelContract.ViewModels;
+using SquirrelContract.BindingModels;
+using SquirrelDatabase.Models;
+using SquirrelContract.Enums;
+
+namespace SquirrelTests.WebApiControllersTests;
+
+[TestFixture]
+internal class CocktailControllerTests : BaseWebApiControllerTest
+{
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemoveCocktailsFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: "name 1");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: "name 2");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: "name 3");
+        //Act
+        var response = await HttpClient.GetAsync("/api/cocktails/getrecords");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<CocktailViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == cocktail.Id), cocktail);
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync("/api/cocktails/getrecords");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<CocktailViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetHistoryByCocktailId_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 20, DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        var history = SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 40, DateTime.UtcNow.AddDays(1));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/gethistory?id={cocktail.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<CocktailHistoryViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.That(data, Has.Count.EqualTo(3));
+        AssertElement(data[0], history);
+    }
+
+    [Test]
+    public async Task GetHistoryByCocktailId_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 20, DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        SquirrelDbContext.InsertCocktailHistoryToDatabaseAndReturn(cocktail.Id, 40, DateTime.UtcNow.AddDays(1));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/gethistory?id={Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<CocktailViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.That(data, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public async Task GetHistoryByCocktailId_WhenCocktailIdIsNotGuid_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/gethistory?id=id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/getrecord/{cocktail.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<CocktailViewModel>(response), cocktail);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/getrecord/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktail = SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/getrecord/{cocktail.CocktailName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<CocktailViewModel>(response), cocktail);
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/cocktails/getrecord/New%20Name");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        var cocktailModel = CreateModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(SquirrelDbContext.GetCocktailFromDatabaseById(cocktailModel.Id!), cocktailModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModel = CreateModel();
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModel = CreateModel(cocktailName: "unique name");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: cocktailModel.CocktailName!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModelWithIdIncorrect = new CocktailBindingModel { Id = "Id", CocktailName = "name", Price = 100, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        var cocktailModelWithNameIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = string.Empty, Price = 100, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        var cocktailModelWithBaseAlcoholIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = "name", Price = 100, BaseAlcohol = string.Empty };
+        var cocktailModelWithPriceIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = "name", Price = 0, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModelWithNameIncorrect));
+        var responseWithBaseAlcoholIncorrect = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModelWithBaseAlcoholIncorrect));
+        var responseWithPriceIncorrect = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(cocktailModelWithPriceIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithBaseAlcoholIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPriceIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/cocktails/register", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktailModel = CreateModel();
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        AssertElement(SquirrelDbContext.GetCocktailFromDatabaseById(cocktailModel.Id!), cocktailModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModel = CreateModel();
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModel = CreateModel(cocktailName: "unique name");
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailModel.Id);
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailName: cocktailModel.CocktailName!);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var cocktailModelWithIdIncorrect = new CocktailBindingModel { Id = "Id", CocktailName = "name", Price = 100, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        var cocktailModelWithNameIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = string.Empty, Price = 100, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        var cocktailModelWithBaseAlcoholIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = "name", Price = 100, BaseAlcohol = string.Empty };
+        var cocktailModelWithPriceIncorrect = new CocktailBindingModel { Id = Guid.NewGuid().ToString(), CocktailName = "name", Price = 0, BaseAlcohol = AlcoholType.Vodka.ToString() };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModelWithNameIncorrect));
+        var responseWithBaseAlcoholIncorrect = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModelWithBaseAlcoholIncorrect));
+        var responseWithPriceIncorrect = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(cocktailModelWithPriceIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithBaseAlcoholIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPriceIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/cocktails/changeinfo", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var cocktailId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn(cocktailId);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/cocktails/delete/{cocktailId}");
+        SquirrelDbContext.ChangeTracker.Clear();
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertCocktailToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/cocktails/delete/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/cocktails/delete/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(CocktailViewModel? actual, Cocktail expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.CocktailName, Is.EqualTo(expected.CocktailName));
+            Assert.That(actual.BaseAlcohol, Is.EqualTo(expected.BaseAlcohol.ToString()));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+
+    private static void AssertElement(CocktailHistoryViewModel? actual, CocktailHistory expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.CocktailName, Is.EqualTo(expected.Cocktail!.CocktailName));
+            Assert.That(actual.OldPrice, Is.EqualTo(expected.OldPrice));
+            Assert.That(actual.ChangeDate.ToString(), Is.EqualTo(expected.ChangeDate.ToString()));
+        });
+    }
+
+    private static CocktailBindingModel CreateModel(string? id = null, string cocktailName = "name", AlcoholType cocktailType = AlcoholType.Vodka, double price = 1)
+        => new()
+        {
+            Id = id ?? Guid.NewGuid().ToString(),
+            CocktailName = cocktailName,
+            BaseAlcohol = cocktailType.ToString(),
+            Price = price
+        };
+
+    private static void AssertElement(Cocktail? actual, CocktailBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.CocktailName, Is.EqualTo(expected.CocktailName));
+            Assert.That(actual.BaseAlcohol.ToString(), Is.EqualTo(expected.BaseAlcohol));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+}

SquirrelContract/SquirrelTests/WebApiControllersTests/EmployeeControllerTests.cs

@@ -0,0 +1,551 @@
+using SquirrelContract.BindingModels;
+using SquirrelContract.ViewModels;
+using SquirrelDatabase.Models;
+using SquirrelTests.Infrastructure;
+using System.Net;
+
+namespace SquirrelTests.WebApiControllersTests;
+
+[TestFixture]
+internal class EmployeeControllerTests : BaseWebApiControllerTest
+{
+    private Post _post;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemovePostsFromDatabase();
+        SquirrelDbContext.RemoveEmployeesFromDatabase();
+    }
+
+    [Test]
+    public async Task GetList_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: _post.PostId)
+            .AddPost(_post);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: _post.PostId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", postId: _post.PostId);
+        //Act
+        var response = await HttpClient.GetAsync("/api/employees/getrecords");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == employee.Id), employee);
+    }
+
+    [Test]
+    public async Task GetList_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync("/api/employees/getrecords");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetList_OnlyActual_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: _post.PostId, isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: _post.PostId, isDeleted: false);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", postId: _post.PostId, isDeleted: false);
+        //Act
+        var response = await HttpClient.GetAsync("/api/employees/getrecords?includeDeleted=false");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+            Assert.That(data.All(x => !x.IsDeleted));
+        });
+    }
+
+    [Test]
+    public async Task GetList_IncludeNoActual_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: _post.PostId, isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: _post.PostId, isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", postId: _post.PostId, isDeleted: false);
+        //Act
+        var response = await HttpClient.GetAsync("/api/employees/getrecords?includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(3));
+            Assert.That(data.Any(x => x.IsDeleted));
+            Assert.That(data.Any(x => !x.IsDeleted));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByPostId_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: _post.PostId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", postId: _post.PostId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", postId: _post.PostId, isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 4");
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getpostrecords?id={_post.PostId}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(3));
+            Assert.That(data.All(x => x.PostId == _post.PostId));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByPostId_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", postId: _post.PostId);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 4");
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getpostrecords?id={Guid.NewGuid()}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.That(data, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public async Task GetList_ByPostId_WhenIdIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getpostrecords?id=id&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetList_ByBirthDate_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", birthDate: DateTime.UtcNow.AddYears(-25));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", birthDate: DateTime.UtcNow.AddYears(-21));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", birthDate: DateTime.UtcNow.AddYears(-20), isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 4", birthDate: DateTime.UtcNow.AddYears(-19));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getbirthdaterecords?fromDate={DateTime.UtcNow.AddYears(-21).AddMinutes(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddYears(-20).AddMinutes(1):MM/dd/yyyy HH:mm:ss}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByBirthDate_WhenDateIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getbirthdaterecords?fromDate={DateTime.UtcNow.AddMinutes(1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddMinutes(-1):MM/dd/yyyy HH:mm:ss}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetList_ByEmploymentDate_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 1", employmentDate: DateTime.UtcNow.AddDays(-2));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 2", employmentDate: DateTime.UtcNow.AddDays(-1));
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 3", employmentDate: DateTime.UtcNow.AddDays(1), isDeleted: true);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(fio: "fio 4", employmentDate: DateTime.UtcNow.AddDays(2));
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getemploymentrecords?fromDate={DateTime.UtcNow.AddDays(-1).AddMinutes(-1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddDays(1).AddMinutes(1):MM/dd/yyyy HH:mm:ss}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<EmployeeViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public async Task GetList_ByEmploymentDate_WhenDateIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getemploymentrecords?fromDate={DateTime.UtcNow.AddMinutes(1):MM/dd/yyyy HH:mm:ss}&toDate={DateTime.UtcNow.AddMinutes(-1):MM/dd/yyyy HH:mm:ss}&includeDeleted=true");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId).AddPost(_post);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<EmployeeViewModel>(response), employee);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId, isDeleted: true);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.Id}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId).AddPost(_post);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.FIO}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<EmployeeViewModel>(response), employee);
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/New%20Fio");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByFIO_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId, isDeleted: true);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.FIO}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByEmail_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId).AddPost(_post);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.Email}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<EmployeeViewModel>(response), employee);
+    }
+
+    [Test]
+    public async Task GetElement_ByEmail_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/New%20Email");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByEmail_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var employee = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(postId: _post.PostId, isDeleted: true);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/employees/getrecord/{employee.Email}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        var employeeModel = CreateModel(_post.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(SquirrelDbContext.GetEmployeeFromDatabaseById(employeeModel.Id!), employeeModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeModel = CreateModel(_post.Id);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employeeModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeModelWithIdIncorrect = new EmployeeBindingModel { Id = "Id", FIO = "fio", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithFioIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithEmailIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", Email = "abc", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithPostIdIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = "Id" };
+        var employeeModelWithBirthDateIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", BirthDate = DateTime.UtcNow.AddYears(-15), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModelWithFioIncorrect));
+        var responseWithEmailIncorrect = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModelWithEmailIncorrect));
+        var responseWithPostIdIncorrect = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModelWithPostIdIncorrect));
+        var responseWithBirthDateIncorrect = await HttpClient.PostAsync($"/api/employees/register", MakeContent(employeeModelWithBirthDateIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithEmailIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Email is incorrect");
+            Assert.That(responseWithPostIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PostId is incorrect");
+            Assert.That(responseWithBirthDateIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "BirthDate is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/employees/register", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/employees/register", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employeeModel = CreateModel(_post.Id);
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employeeModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        AssertElement(SquirrelDbContext.GetEmployeeFromDatabaseById(employeeModel.Id!), employeeModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeModel = CreateModel(_post.Id, fio: "new fio");
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeModel = CreateModel(_post.Id, fio: "new fio");
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employeeModel.Id, isDeleted: true);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeModelWithIdIncorrect = new EmployeeBindingModel { Id = "Id", FIO = "fio", Email = "abc@mail.ru", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithFioIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = string.Empty, Email = "abc@mail.ru", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithEmailIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", Email = "abc", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        var employeeModelWithPostIdIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", Email = "abc@mail.ru", BirthDate = DateTime.UtcNow.AddYears(-22), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = "Id" };
+        var employeeModelWithBirthDateIncorrect = new EmployeeBindingModel { Id = Guid.NewGuid().ToString(), FIO = "fio", Email = "abc@mail.ru", BirthDate = DateTime.UtcNow.AddYears(-15), EmploymentDate = DateTime.UtcNow.AddDays(-5), PostId = _post.Id };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModelWithIdIncorrect));
+        var responseWithFioIncorrect = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModelWithFioIncorrect));
+        var responseWithEmailIncorrect = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModelWithEmailIncorrect));
+        var responseWithPostIdIncorrect = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModelWithPostIdIncorrect));
+        var responseWithBirthDateIncorrect = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(employeeModelWithBirthDateIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithFioIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Fio is incorrect");
+            Assert.That(responseWithEmailIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Email is incorrect");
+            Assert.That(responseWithPostIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "PostId is incorrect");
+            Assert.That(responseWithBirthDateIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "BirthDate is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/employees/changeinfo", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var employeeId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(employeeId);
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/employees/delete/{employeeId}");
+        SquirrelDbContext.ChangeTracker.Clear();
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(SquirrelDbContext.GetEmployeeFromDatabaseById(employeeId)!.IsDeleted);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertEmployeeToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/employees/delete/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/employees/delete/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var employeeId = SquirrelDbContext.InsertEmployeeToDatabaseAndReturn(isDeleted: true).Id;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/employees/delete/{employeeId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(EmployeeViewModel? actual, Employee expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.PostName, Is.EqualTo(expected.Post!.PostName));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));
+            Assert.That(actual.BirthDate.ToString(), Is.EqualTo(expected.BirthDate.ToString()));
+            Assert.That(actual.EmploymentDate.ToString(), Is.EqualTo(expected.EmploymentDate.ToString()));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static EmployeeBindingModel CreateModel(string postId, string? id = null, string fio = "fio", string email = "abc@gmail.com", DateTime? birthDate = null, DateTime? employmentDate = null)
+    {
+        return new()
+        {
+            Id = id ?? Guid.NewGuid().ToString(),
+            FIO = fio,
+            Email = email,
+            BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-22),
+            EmploymentDate = employmentDate ?? DateTime.UtcNow.AddDays(-5),
+            PostId = postId
+        };
+    }
+
+    private static void AssertElement(Employee? actual, EmployeeBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));
+            Assert.That(actual.BirthDate.ToString(), Is.EqualTo(expected.BirthDate.ToString()));
+            Assert.That(actual.EmploymentDate.ToString(), Is.EqualTo(expected.EmploymentDate.ToString()));
+            Assert.That(!actual.IsDeleted);
+        });
+    }
+}

SquirrelContract/SquirrelTests/WebApiControllersTests/PostControllerTests.cs

@@ -0,0 +1,556 @@
+using SquirrelContract.BindingModels;
+using SquirrelContract.Enums;
+using SquirrelContract.Infastructure.PostConfigurations;
+using SquirrelContract.ViewModels;
+using SquirrelDatabase.Models;
+using SquirrelTests.Infrastructure;
+using System.Net;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+
+namespace SquirrelTests.WebApiControllersTests;
+
+[TestFixture]
+internal class PostControllerTests : BaseWebApiControllerTest
+{
+    [TearDown]
+    public void TearDown()
+    {
+        SquirrelDbContext.RemovePostsFromDatabase();
+    }
+
+    [Test]
+    public async Task GetRecords_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 2");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 3");
+        //Act
+        var response = await HttpClient.GetAsync("/api/posts");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(3));
+        });
+        AssertElement(data.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public async Task GetRecords_WhenDifferentConfigTypes_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postSimple = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1");
+        var postBartender = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 2", config: new BartenderPostConfiguration() { SalePercent = 500 });
+        var postManager = SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 3", config: new ManagerPostConfiguration() { PersonalCountTrendPremium = 20 });
+        //Act
+        var response = await HttpClient.GetAsync("/api/posts");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.That(data, Is.Not.Null);
+        AssertElement(data.First(x => x.Id == postSimple.PostId), postSimple);
+        AssertElement(data.First(x => x.Id == postBartender.PostId), postBartender);
+        AssertElement(data.First(x => x.Id == postManager.PostId), postManager);
+    }
+
+    [Test]
+    public async Task GetHistory_WhenHaveRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/{postId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(2));
+        });
+        AssertElement(data.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public async Task GetHistory_WhenNoRecords_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: "name 1", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        var data = await GetModelFromResponseAsync<List<PostViewModel>>(response);
+        Assert.Multiple(() =>
+        {
+            Assert.That(data, Is.Not.Null);
+            Assert.That(data, Has.Count.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public async Task GetHistory_WhenWrongData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posthistory/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<PostViewModel>(response), post);
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ById_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenHaveRecord_ShouldSuccess_Test()
+    {
+        //Arrange
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+        AssertElement(await GetModelFromResponseAsync<PostViewModel>(response), post);
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenNoRecord_ShouldNotFound_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/New%20Name");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task GetElement_ByName_WhenRecordWasDeleted_ShouldNotFound_Test()
+    {
+        //Arrange
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false);
+        //Act
+        var response = await HttpClient.GetAsync($"/api/posts/{post.PostName}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+
+    [Test]
+    public async Task Post_ShouldSuccess_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        var postModel = CreateModel();
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        AssertElement(SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!), postModel);
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameId_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel(postName: "unique name");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: postModel.PostName!);
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModelWithIdIncorrect = new PostBindingModel { Id = "Id", PostName = "name", PostType = PostType.Bartender.ToString(), ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithNameIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Bartender.ToString(), ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithPostTypeIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = string.Empty, ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithSalaryIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Bartender.ToString(), ConfigurationJson = null };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithNameIncorrect));
+        var responseWithPostTypeIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithPostTypeIncorrect));
+        var responseWithSalaryIncorrect = await HttpClient.PostAsync($"/api/posts", MakeContent(postModelWithSalaryIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPostTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Type is incorrect");
+            Assert.That(responseWithSalaryIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Salary is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Post_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Post_WithBartenderPostConfiguration_ShouldSuccess_Test()
+    {
+        //Arrange
+        var salePercent = 10;
+        var postModel = CreateModel(configuration: JsonSerializer.Serialize(new BartenderPostConfiguration() { SalePercent = salePercent, Rate = 10 }));
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(BartenderPostConfiguration).Name));
+            Assert.That((element.Configuration as BartenderPostConfiguration)!.SalePercent, Is.EqualTo(salePercent));
+        });
+    }
+
+    [Test]
+    public async Task Post_WithManagerPostConfiguration_ShouldSuccess_Test()
+    {
+        //Arrange
+        var trendPremium = 20;
+        var postModel = CreateModel(configuration: JsonSerializer.Serialize(new ManagerPostConfiguration() { PersonalCountTrendPremium = trendPremium, Rate = 10 }));
+        //Act
+        var response = await HttpClient.PostAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(ManagerPostConfiguration).Name));
+            Assert.That((element.Configuration as ManagerPostConfiguration)!.PersonalCountTrendPremium, Is.EqualTo(trendPremium));
+        });
+    }
+
+    [Test]
+    public async Task Put_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        AssertElement(SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!), postModel);
+    }
+
+    [Test]
+    public async Task Put_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenRecordWasDeleted_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel();
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postModel.Id, isActual: false);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenHaveRecordWithSameName_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModel = CreateModel(postName: "unique name");
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postModel.Id);
+        SquirrelDbContext.InsertPostToDatabaseAndReturn(postName: postModel.PostName!);
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenDataIsIncorrect_ShouldBadRequest_Test()
+    {
+        //Arrange
+        var postModelWithIdIncorrect = new PostBindingModel { Id = "Id", PostName = "name", PostType = PostType.Bartender.ToString(), ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithNameIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Bartender.ToString(), ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithPostTypeIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = string.Empty, ConfigurationJson = JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 }) };
+        var postModelWithSalaryIncorrect = new PostBindingModel { Id = Guid.NewGuid().ToString(), PostName = string.Empty, PostType = PostType.Bartender.ToString(), ConfigurationJson = null };
+        //Act
+        var responseWithIdIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithIdIncorrect));
+        var responseWithNameIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithNameIncorrect));
+        var responseWithPostTypeIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithPostTypeIncorrect));
+        var responseWithSalaryIncorrect = await HttpClient.PutAsync($"/api/posts", MakeContent(postModelWithSalaryIncorrect));
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(responseWithIdIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Id is incorrect");
+            Assert.That(responseWithNameIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Name is incorrect");
+            Assert.That(responseWithPostTypeIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Type is incorrect");
+            Assert.That(responseWithSalaryIncorrect.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest), "Salary is incorrect");
+        });
+    }
+
+    [Test]
+    public async Task Put_WhenSendEmptyData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(string.Empty));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(new { Data = "test", Position = 10 }));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Put_WithBartenderPostConfiguration_ShouldSuccess_Test()
+    {
+        //Arrange
+        var salePercent = 10;
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        var postModel = CreateModel(post.PostId, configuration: JsonSerializer.Serialize(new BartenderPostConfiguration() { SalePercent = salePercent, Rate = 10 }));
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(BartenderPostConfiguration).Name));
+            Assert.That((element.Configuration as BartenderPostConfiguration)!.SalePercent, Is.EqualTo(salePercent));
+        });
+    }
+
+    [Test]
+    public async Task Put_WithManagerPostConfiguration_ShouldSuccess_Test()
+    {
+        //Arrange
+        var trendPremium = 20;
+        var post = SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        var postModel = CreateModel(post.PostId, configuration: JsonSerializer.Serialize(new ManagerPostConfiguration() { PersonalCountTrendPremium = trendPremium, Rate = 10 }));
+        //Act
+        var response = await HttpClient.PutAsync($"/api/posts", MakeContent(postModel));
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+        SquirrelDbContext.ChangeTracker.Clear();
+        var element = SquirrelDbContext.GetPostFromDatabaseByPostId(postModel.Id!);
+        Assert.That(element, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element.Configuration.Type, Is.EqualTo(typeof(ManagerPostConfiguration).Name));
+            Assert.That((element.Configuration as ManagerPostConfiguration)!.PersonalCountTrendPremium, Is.EqualTo(trendPremium));
+        });
+    }
+
+    [Test]
+    public async Task Delete_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = SquirrelDbContext.InsertPostToDatabaseAndReturn().PostId;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{postId}");
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(SquirrelDbContext.GetPostFromDatabaseByPostId(postId), Is.Null);
+        });
+    }
+
+    [Test]
+    public async Task Delete_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{Guid.NewGuid()}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenRecordWasDeleted_Test()
+    {
+        //Arrange
+        var postId = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false).PostId;
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/{postId}");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Delete_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.DeleteAsync($"/api/posts/id");
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Patch_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = SquirrelDbContext.InsertPostToDatabaseAndReturn(isActual: false).PostId;
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{postId}", null);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(SquirrelDbContext.GetPostFromDatabaseByPostId(postId), Is.Not.Null);
+        });
+    }
+
+    [Test]
+    public async Task Patch_WhenNoFoundRecord_ShouldBadRequest_Test()
+    {
+        //Arrange
+        SquirrelDbContext.InsertPostToDatabaseAndReturn();
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{Guid.NewGuid()}", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    [Test]
+    public async Task Patch_WhenRecordNotWasDeleted_ShouldSuccess_Test()
+    {
+        //Arrange
+        var postId = SquirrelDbContext.InsertPostToDatabaseAndReturn().PostId;
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/{postId}", null);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
+            Assert.That(SquirrelDbContext.GetPostFromDatabaseByPostId(postId), Is.Not.Null);
+        });
+    }
+
+    [Test]
+    public async Task Patch_WhenSendWrongFormatData_ShouldBadRequest_Test()
+    {
+        //Act
+        var response = await HttpClient.PatchAsync($"/api/posts/id", null);
+        //Assert
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));
+    }
+
+    private static void AssertElement(PostViewModel? actual, Post expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.PostId));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType.ToString()));
+            Assert.That(JsonNode.Parse(actual.Configuration)!["Type"]!.GetValue<string>(), Is.EqualTo(expected.Configuration.Type));
+        });
+    }
+
+    private static PostBindingModel CreateModel(string? postId = null, string postName = "name", PostType postType = PostType.Bartender, string? configuration = null)
+        => new()
+        {
+            Id = postId ?? Guid.NewGuid().ToString(),
+            PostName = postName,
+            PostType = postType.ToString(),
+            ConfigurationJson = configuration ?? JsonSerializer.Serialize(new PostConfiguration() { Rate = 10 })
+        };
+
+    private static void AssertElement(Post? actual, PostBindingModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.PostId, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType.ToString(), Is.EqualTo(expected.PostType));
+            Assert.That(actual.Configuration.Type, Is.EqualTo(JsonNode.Parse(expected.ConfigurationJson!)!["Type"]!.GetValue<string>()));
+        });
+    }
+}