diff --git a/MagicCarpetProject/MagicCarpetTests/Infrastructure/ConfigurationDatabaseTest.cs b/MagicCarpetProject/MagicCarpetTests/Infrastructure/ConfigurationDatabaseTest.cs
index 5793e28..3862745 100644
--- a/MagicCarpetProject/MagicCarpetTests/Infrastructure/ConfigurationDatabaseTest.cs
+++ b/MagicCarpetProject/MagicCarpetTests/Infrastructure/ConfigurationDatabaseTest.cs
@@ -3,11 +3,11 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using MagicCarpetContracts.Infrastructure;
 
 namespace MagicCarpetTests.Infrastructure;
 
-internal class ConfigurationDatabaseTest
+internal class ConfigurationDatabaseTest : IConfigurationDatabase
 {
-    public string ConnectionString =>
-        "Host=local;Port=5432;Database=MagicCarpetTest;Username=postgres;Password=postgres;";
+    public string ConnectionString => "Host=local;Port=5432;Database=MagicCarpetTest;Username=postgres;Password=postgres;";
 }
diff --git a/MagicCarpetProject/MagicCarpetTests/StoragesContracts/ClientStorageContractTests.cs b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/ClientStorageContractTests.cs
new file mode 100644
index 0000000..a7a9d27
--- /dev/null
+++ b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/ClientStorageContractTests.cs
@@ -0,0 +1,218 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContracts;
+
+[TestFixture]
+internal class ClientStorageContractTests : BaseStorageContractTest
+{
+    private ClientStorageContarct _clientStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _clientStorageContract = new ClientStorageContarct(MagicCarpetDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Clients\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+5-555-555-55-55");
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+6-666-666-66-66");
+        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 = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementById(client.Id), client);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _clientStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementByFIO(client.FIO), client);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _clientStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenHaveRecord_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementByPhoneNumber(client.PhoneNumber), client);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenNoRecord_Test()
+    {
+        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(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);
+        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);
+        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);
+        InsertClientToDatabaseAndReturn(client.Id);
+        _clientStorageContract.UpdElement(client);
+        AssertElement(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);
+        InsertClientToDatabaseAndReturn(client.Id, phoneNumber: "+7-777-777-77-77");
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: client.PhoneNumber);
+        Assert.That(() => _clientStorageContract.UpdElement(client), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _clientStorageContract.DelElement(client.Id);
+        var element = GetClientFromDatabase(client.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenHaveSalesByThisBuyer_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        var employeeId = Guid.NewGuid().ToString();
+        MagicCarpetDbContext.Employees.Add(new Employee() { Id = employeeId, FIO = "test", PostId = Guid.NewGuid().ToString() });
+        MagicCarpetDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+        MagicCarpetDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+        MagicCarpetDbContext.SaveChanges();
+        var salesBeforeDelete = MagicCarpetDbContext.Sales.Where(x => x.ClientId == client.Id).ToArray();
+        _clientStorageContract.DelElement(client.Id);
+        var element = GetClientFromDatabase(client.Id);
+        var salesAfterDelete = MagicCarpetDbContext.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(MagicCarpetDbContext.Sales.Count(), Is.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _clientStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Client InsertClientToDatabaseAndReturn(string id, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+    {
+        var client = new Client() { Id = id, FIO = fio, PhoneNumber = phoneNumber, DiscountSize = discountSize };
+        MagicCarpetDbContext.Clients.Add(client);
+        MagicCarpetDbContext.SaveChanges();
+        return client;
+    }
+
+    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 Client? GetClientFromDatabase(string id) => MagicCarpetDbContext.Clients.FirstOrDefault(x => x.Id == id);
+
+    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));
+        });
+    }
+}
diff --git a/MagicCarpetProject/MagicCarpetTests/StoragesContracts/EmployeeStorageContractTests.cs b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/EmployeeStorageContractTests.cs
new file mode 100644
index 0000000..621fad8
--- /dev/null
+++ b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/EmployeeStorageContractTests.cs
@@ -0,0 +1,244 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContracts;
+
+[TestFixture]
+class EmployeeStorageContractTests : BaseStorageContractTest
+{
+    private EmployeeStorageContract _employeeStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _employeeStorageContract = new EmployeeStorageContract(MagicCarpetDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1");
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2");
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
+        var list = _employeeStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), employee);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _employeeStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPostId_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", postId);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", postId);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
+        var list = _employeeStorageContract.GetList(email: 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_ByEmailId_Test()
+    {
+        var email = Guid.NewGuid().ToString();
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", email);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", email);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
+        var list = _employeeStorageContract.GetList(email: email);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.Email == email));
+    }
+
+    [Test]
+    public void Try_GetList_ByBirthDate_Test()
+    {
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", birthDate: DateTime.UtcNow.AddYears(-25));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", birthDate: DateTime.UtcNow.AddYears(-21));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", birthDate: DateTime.UtcNow.AddYears(-20));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", birthDate: DateTime.UtcNow.AddYears(-19));
+        var list = _employeeStorageContract.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()
+    {
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", employmentDate: DateTime.UtcNow.AddDays(1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", employmentDate: DateTime.UtcNow.AddDays(2));
+        var list = _employeeStorageContract.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();
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", postId, "email@mail.ru", birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", postId, "email@mail.ru", birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", postId, "email@mail.ru", birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "email@mail.ru", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
+        var list = _employeeStorageContract.GetList(postId: postId, email: "email@mail.ru", 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 = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_employeeStorageContract.GetElementById(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _employeeStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_employeeStorageContract.GetElementByFIO(employee.FIO), employee);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        Assert.That(() => _employeeStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        _employeeStorageContract.AddElement(employee);
+        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id);
+        Assert.That(() => _employeeStorageContract.AddElement(employee), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString(), "New Fio");
+        InsertEmployeeToDatabaseAndReturn(employee.Id);
+        _employeeStorageContract.UpdElement(employee);
+        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _employeeStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _employeeStorageContract.UpdElement(employee), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _employeeStorageContract.DelElement(employee.Id);
+        var element = GetEmployeeFromDatabase(employee.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.IsDeleted);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _employeeStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _employeeStorageContract.DelElement(employee.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string id, string fio = "test", string? email = null,string ? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false)
+    {
+        var employee = new Employee() { Id = id, FIO = fio, PostId = postId ?? Guid.NewGuid().ToString(), Email = email, BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20), EmploymentDate = employmentDate ?? DateTime.UtcNow, IsDeleted = isDeleted };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    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? postId = null, string? email = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false) =>
+        new(id, fio, postId ?? Guid.NewGuid().ToString(), email, birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow, isDeleted);
+
+    private Employee? GetEmployeeFromDatabase(string id) => MagicCarpetDbContext.Employees.FirstOrDefault(x => x.Id == id);
+
+    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));
+        });
+    }
+}
diff --git a/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SalaryStorageContractTests.cs b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SalaryStorageContractTests.cs
new file mode 100644
index 0000000..8920b2c
--- /dev/null
+++ b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SalaryStorageContractTests.cs
@@ -0,0 +1,153 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContracts;
+
+[TestFixture]
+internal class SalaryStorageContractTests : BaseStorageContractTest
+{
+    private SalaryStorageContract _salaryStorageContract;
+    private Employee _employee;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract = new SalaryStorageContract(MagicCarpetDbContext);
+        _employee = InsertEmployeeToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Salaries\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var salary = InsertSalaryToDatabaseAndReturn(_employee.Id, employeeSalary: 100);
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        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.First(), salary);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyInDatePeriod_Test()
+    {
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(5));
+        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 = InsertEmployeeToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        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 = InsertEmployeeToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        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(GetSalaryFromDatabaseByEmployeeId(_employee.Id), salary);
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string employeeFIO = "fio")
+    {
+        var employee = new Employee() { Id = Guid.NewGuid().ToString(), PostId = Guid.NewGuid().ToString(), FIO = employeeFIO, IsDeleted = false };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    private Salary InsertSalaryToDatabaseAndReturn(string employeeId, double employeeSalary = 1, DateTime? salaryDate = null)
+    {
+        var salary = new Salary() { EmployeeId = employeeId, EmployeeSalary = employeeSalary, SalaryDate = salaryDate ?? DateTime.UtcNow };
+        MagicCarpetDbContext.Salaries.Add(salary);
+        MagicCarpetDbContext.SaveChanges();
+        return 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 Salary? GetSalaryFromDatabaseByEmployeeId(string id) => MagicCarpetDbContext.Salaries.FirstOrDefault(x => x.EmployeeId == id);
+
+    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));
+        });
+    }
+}
diff --git a/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SaleStorageContractTests.cs b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SaleStorageContractTests.cs
new file mode 100644
index 0000000..1263731
--- /dev/null
+++ b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/SaleStorageContractTests.cs
@@ -0,0 +1,306 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace MagicCarpetTests.StoragesContracts;
+
+[TestFixture]
+internal class SaleStorageContractTests : BaseStorageContractTest
+{
+    private SaleStorageContract _saleStorageContract;
+    private Client _client;
+    private Employee _employee;
+    private Tour _tour;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _saleStorageContract = new SaleStorageContract(MagicCarpetDbContext);;
+        _client = InsertClientToDatabaseAndReturn();
+        _employee = InsertEmployeeToDatabaseAndReturn();
+        _tour = InsertTourToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Clients\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Tours\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 5)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(_tour.Id, 10)]);
+        var list = _saleStorageContract.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 = _saleStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPeriod_Test()
+    {
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.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 = InsertEmployeeToDatabaseAndReturn("Other employee");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.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 = InsertClientToDatabaseAndReturn("Other fio", "+8-888-888-88-88");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.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_ByTourId_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn("Other name");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 5)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1), (tour.Id, 4)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(tour.Id, 1), (_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(tourId: _tour.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        Assert.That(list.All(x => x.Tours.Any(y => y.TourId == _tour.Id)));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn("Other employee");
+        var client = InsertClientToDatabaseAndReturn("Other fio", "+8-888-888-88-88");
+        var tour = InsertTourToDatabaseAndReturn("Other name");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1), employeeId: _employee.Id, clientId: _client.Id, tourId: tour.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        AssertElement(_saleStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        Assert.That(() => _saleStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordHasCanceled_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: true);
+        AssertElement(_saleStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, false, [_tour.Id]);
+        _saleStorageContract.AddElement(sale);
+        AssertElement(GetSaleFromDatabaseById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenIsDeletedIsTrue_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, true, [_tour.Id]);
+        Assert.That(() => _saleStorageContract.AddElement(sale), Throws.Nothing);
+        AssertElement(GetSaleFromDatabaseById(sale.Id), CreateModel(sale.Id, _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, false, [_tour.Id]));
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: false);
+        _saleStorageContract.DelElement(sale.Id);
+        var element = GetSaleFromDatabaseById(sale.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsCancel);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _saleStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasCanceled_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: true);
+        Assert.That(() => _saleStorageContract.DelElement(sale.Id), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    private Client InsertClientToDatabaseAndReturn(string fio = "test", string phoneNumber = "+7-777-777-77-77")
+    {
+        var client = new Client() { Id = Guid.NewGuid().ToString(), FIO = fio, PhoneNumber = phoneNumber, DiscountSize = 10 };
+        MagicCarpetDbContext.Clients.Add(client);
+        MagicCarpetDbContext.SaveChanges();
+        return client;
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string fio = "test")
+    {
+        var employee = new Employee() { Id = Guid.NewGuid().ToString(), FIO = fio, PostId = Guid.NewGuid().ToString() };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    private Tour InsertTourToDatabaseAndReturn(string tourName = "test", TourType tourType = TourType.Beach, double price = 1, bool isDeleted = false)
+    {
+        var tour = new Tour() { Id = Guid.NewGuid().ToString(), TourName = tourName, Type = tourType, Price = price };
+        MagicCarpetDbContext.Tours.Add(tour);
+        MagicCarpetDbContext.SaveChanges();
+        return tour;
+    }
+
+    private Sale InsertSaleToDatabaseAndReturn(string employeeId, string? clientId, DateTime? saleDate = null, double sum = 1, DiscountType discountType = DiscountType.OnSale, double discount = 0, bool isCancel = false, List<(string, int)>? tours = null)
+    {
+        var sale = new Sale() { EmployeeId = employeeId, ClientId = clientId, SaleDate = saleDate ?? DateTime.UtcNow, Sum = sum, DiscountType = discountType, Discount = discount, IsCancel = isCancel, SaleTours = [] };
+        if (tours is not null)
+        {
+            foreach (var elem in tours)
+            {
+                sale.SaleTours.Add(new SaleTour { TourId = elem.Item1, SaleId = sale.Id, Count = elem.Item2 });
+            }
+        }
+        MagicCarpetDbContext.Sales.Add(sale);
+        MagicCarpetDbContext.SaveChanges();
+        return sale;
+    }
+
+    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.SaleTours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.SaleTours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.SaleTours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.SaleTours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static SaleDataModel CreateModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel, List<string> tourIds)
+    {
+        var tours = tourIds.Select(x => new SaleTourDataModel(id, x, 1)).ToList();
+        return new(id, employeeId, clientId, sum, discountType, discount, isCancel, tours);
+    }
+
+    private Sale? GetSaleFromDatabaseById(string id) => MagicCarpetDbContext.Sales.Include(x => x.SaleTours).FirstOrDefault(x => x.Id == id);
+
+    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.Tours is not null)
+        {
+            Assert.That(actual.SaleTours, Is.Not.Null);
+            Assert.That(actual.SaleTours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.SaleTours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.SaleTours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.SaleTours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.SaleTours, Is.Null);
+        }
+    }
+}
diff --git a/MagicCarpetProject/MagicCarpetTests/StoragesContracts/TourStorageContractTests.cs b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/TourStorageContractTests.cs
new file mode 100644
index 0000000..e4bace7
--- /dev/null
+++ b/MagicCarpetProject/MagicCarpetTests/StoragesContracts/TourStorageContractTests.cs
@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContracts;
+
+class TourStorageContractTests
+{
+}