добавил модель и тесты для зарплаты

добавил регулярное выражение и тесты для него

SPiluSZharuProject/SPiluSZharuContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,47 @@
+using SPiluSZharuContracts.Enums;
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class PostDataModel(string id, string postId, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string PostId { get; private set; } = postId;
+
+    public string PostName { get; private set; } = postName;
+
+    public PostType PostType { get; private set; } = postType;
+
+    public double Salary { get; private set; } = salary;
+
+    public bool IsActual { get; private set; } = isActual;
+
+    public DateTime ChangeDate { get; private set; } = changeDate;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (PostName.IsEmpty())
+            throw new ValidationException("Field PostName is empty");
+
+        if (PostType == PostType.None)
+            throw new ValidationException("Field PostType is empty");
+
+        if (Salary <= 0)
+            throw new ValidationException("Field Salary is empty");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/ProductDataModel.cs

@@ -0,0 +1,37 @@
+using SPiluSZharuContracts.Enums;
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class ProductDataModel(string id, string productName, ProductType productType, double price, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string ProductName { get; private set; } = productName;
+
+    public ProductType ProductType { get; private set; } = productType;
+
+    public double Price { get; private set; } = price;
+
+    public bool IsDeleted { get; private set; } = isDeleted;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (ProductName.IsEmpty())
+            throw new ValidationException("Field ProductName is empty");
+
+        if (ProductType == ProductType.None)
+            throw new ValidationException("Field ProductType is empty");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/ProductHistoryDataModel.cs

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

SPiluSZharuProject/SPiluSZharuContracts/DataModels/RestaurantDataModel.cs

@@ -0,0 +1,26 @@
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class RestaurantDataModel(string id, string restaurantName, string? prevRestaurantName, string? prevPrevRestaurantName) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string RestaurantName { get; private set; } = restaurantName;
+
+    public string? PrevRestaurantName { get; private set; } = prevRestaurantName;
+
+    public string? PrevPrevRestaurantName { get; private set; } = prevPrevRestaurantName;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (RestaurantName.IsEmpty())
+            throw new ValidationException("Field RestaurantName is empty");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/SalaryDataModel.cs

@@ -0,0 +1,26 @@
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class SalaryDataModel(string workerId, DateTime salaryDate, double workerSalary) : IValidation
+{
+    public string WorkerId { get; private set; } = workerId;
+
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+
+    public double Salary { get; private set; } = workerSalary;
+
+    public void Validate()
+    {
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field WorkerId is empty");
+
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+
+        if (Salary <= 0)
+            throw new ValidationException("Field Salary is less than or equal to 0");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/SaleDataModel.cs

@@ -0,0 +1,46 @@
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class SaleDataModel(string id, string workerId, string? restaurantId, double sum, bool isCancel, List<SaleProductDataModel> products) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string WorkerId { get; private set; } = workerId;
+
+    public string? RestaurantId { get; private set; } = restaurantId;
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+
+    public double Sum { get; private set; } = sum;
+
+    public bool IsCancel { get; private set; } = isCancel;
+
+    public List<SaleProductDataModel> Products { get; private set; } = products;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field WorkerId is empty");
+
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+
+        if (!RestaurantId?.IsGuid() ?? !RestaurantId?.IsEmpty() ?? false)
+            throw new ValidationException("The value in the field RestaurantId is not a unique identifier");
+
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/SaleProductDataModel.cs

@@ -0,0 +1,32 @@
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class SaleProductDataModel(string saleId, string productId, int count) : IValidation
+{
+    public string SaleId { get; private set; } = saleId;
+
+    public string ProductId { get; private set; } = productId;
+
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (SaleId.IsEmpty())
+            throw new ValidationException("Field SaleId is empty");
+
+        if (!SaleId.IsGuid())
+            throw new ValidationException("The value in the field SaleId is not a unique identifier");
+
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field ProductId is empty");
+
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value in the field ProductId is not a unique identifier");
+
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,56 @@
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Extensions;
+using SPiluSZharuContracts.Infrastructure;
+using System.Text.RegularExpressions;
+
+namespace SPiluSZharuContracts.DataModels;
+
+public class WorkerDataModel(string id, string fio, string postId, string phoneNumber, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string PostId { get; private set; } = postId;
+
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
+    public DateTime BirthDate { get; private set; } = birthDate;
+
+    public DateTime EmploymentDate { get; private set; } = employmentDate;
+
+    public bool IsDeleted { get; private set; } = isDeleted;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+
+        if (!Regex.IsMatch(PhoneNumber, @"^(8|\+7)(\s|\(|\-)?(\d{3})(\s|\)|\-)?(\d{3})(\s|\-)?(\d{2})(\s|\-)?(\d{2})$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+
+        if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
+            throw new ValidationException($"Minors cannot be hired (BirthDate = {BirthDate.ToShortDateString()})");
+
+        if (EmploymentDate.Date < BirthDate.Date)
+            throw new ValidationException("The date of employment cannot be less than the date of birth");
+
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) // EmploymentDate.Year - BirthDate.Year
+            throw new ValidationException($"Minors cannot be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/Enums/PostType.cs

@@ -0,0 +1,9 @@
+namespace SPiluSZharuContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Operator = 1,
+    OrderPicker = 2,
+    DeliveryMan = 3
+}

SPiluSZharuProject/SPiluSZharuContracts/Enums/ProductType.cs

@@ -0,0 +1,9 @@
+namespace SPiluSZharuContracts.Enums;
+
+public enum ProductType
+{
+    None = 0,
+    Pizza = 1,
+    Burgers = 2,
+    Drinks = 3
+}

SPiluSZharuProject/SPiluSZharuContracts/Exceptions/ValidationException.cs

@@ -0,0 +1,5 @@
+namespace SPiluSZharuContracts.Exceptions;
+
+public class ValidationException(string message) : Exception(message)
+{
+}

SPiluSZharuProject/SPiluSZharuContracts/Extensions/StringExtensions.cs

@@ -0,0 +1,14 @@
+namespace SPiluSZharuContracts.Extensions;
+
+public static class StringExtensions
+{
+    public static bool IsEmpty(this string str)
+    {
+        return string.IsNullOrWhiteSpace(str);
+    }
+
+    public static bool IsGuid(this string str)
+    {
+        return Guid.TryParse(str, out _);
+    }
+}

SPiluSZharuProject/SPiluSZharuContracts/Infrastructure/IValidation.cs

@@ -0,0 +1,6 @@
+namespace SPiluSZharuContracts.Infrastructure;
+
+public interface IValidation
+{
+    void Validate();
+}

SPiluSZharuProject/SPiluSZharuProject.sln

@@ -1,10 +1,12 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.12.35707.178 d17.12
+VisualStudioVersion = 17.12.35707.178
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SPiluSZharuContracts", "SPiluSZharuContracts\SPiluSZharuContracts.csproj", "{BE7E0C12-A92F-42D7-92CD-7217D1397582}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SPiluSZharuTests", "SPiluSZharuTests\SPiluSZharuTests.csproj", "{32A3EE3B-0EA9-4F4C-AA60-E90E3C563D61}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{BE7E0C12-A92F-42D7-92CD-7217D1397582}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{BE7E0C12-A92F-42D7-92CD-7217D1397582}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{BE7E0C12-A92F-42D7-92CD-7217D1397582}.Release|Any CPU.Build.0 = Release|Any CPU
+		{32A3EE3B-0EA9-4F4C-AA60-E90E3C563D61}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{32A3EE3B-0EA9-4F4C-AA60-E90E3C563D61}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{32A3EE3B-0EA9-4F4C-AA60-E90E3C563D61}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{32A3EE3B-0EA9-4F4C-AA60-E90E3C563D61}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/PostDataModelTests.cs

@@ -0,0 +1,93 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Enums;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Operator, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Operator, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Operator, -10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var postId = Guid.NewGuid().ToString();
+        var postPostId = Guid.NewGuid().ToString();
+        var postName = "name";
+        var postType = PostType.Operator;
+        var salary = 10;
+        var isActual = false;
+        var changeDate = DateTime.UtcNow.AddDays(-1);
+        var post = CreateDataModel(postId, postPostId, postName, postType, salary, isActual, changeDate);
+        Assert.That(() => post.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(post.Id, Is.EqualTo(postId));
+            Assert.That(post.PostId, Is.EqualTo(postPostId));
+            Assert.That(post.PostName, Is.EqualTo(postName));
+            Assert.That(post.PostType, Is.EqualTo(postType));
+            Assert.That(post.Salary, Is.EqualTo(salary));
+            Assert.That(post.IsActual, Is.EqualTo(isActual));
+            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+        });
+    }
+
+    private static PostDataModel CreateDataModel(string? id, string? postId, string? postName, PostType postType, double salary, bool isActual, DateTime changeDate) =>
+       new(id, postId, postName, postType, salary, isActual, changeDate);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/ProductDataModelTests.cs

@@ -0,0 +1,73 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+using SPiluSZharuContracts.Enums;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class ProductDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Pizza, 500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name", ProductType.Pizza, 500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Pizza, 500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Pizza, 500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Pizza, 500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.None, 0, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Pizza, 0, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Pizza, -500, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Pizza;
+        var price = 500;
+        var productIsDeleted = false;
+        var product = CreateDataModel(productId, productName, productType, price, productIsDeleted);
+        Assert.That(() => product.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(product.Id, Is.EqualTo(productId));
+            Assert.That(product.ProductName, Is.EqualTo(productName));
+            Assert.That(product.ProductType, Is.EqualTo(productType));
+            Assert.That(product.Price, Is.EqualTo(price));
+            Assert.That(product.IsDeleted, Is.EqualTo(productIsDeleted));
+        });
+    }
+
+    private static ProductDataModel CreateDataModel(string? id, string? productName, ProductType productType, double price, bool isDeleted) =>
+       new(id, productName, productType, price, isDeleted);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/ProductHistoryDataModelTests.cs

@@ -0,0 +1,52 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class ProductHistoryDataModelTests
+{
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, 500);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, 500);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", 500);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), -500);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var oldPrice = 500;
+        var productHistory = CreateDataModel(productId, oldPrice);
+        Assert.That(() => productHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(productHistory.ProductId, Is.EqualTo(productId));
+            Assert.That(productHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(productHistory.ChangeDate, Is.LessThan(DateTime.UtcNow));
+            Assert.That(productHistory.ChangeDate, Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+
+    private static ProductHistoryDataModel CreateDataModel(string? productId, double oldPrice) =>
+        new(productId, oldPrice);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/RestaurantDataModelTests.cs

@@ -0,0 +1,54 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class RestaurantDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var restaurant = CreateDataModel(null, "name");
+        Assert.That(() => restaurant.Validate(), Throws.TypeOf<ValidationException>());
+        restaurant = CreateDataModel(string.Empty, "name");
+        Assert.That(() => restaurant.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void RestaurantIdIsNotGuidTest()
+    {
+        var restaurant = CreateDataModel("id", "name");
+        Assert.That(() => restaurant.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void RestaurantNameIsNullOrEmptyTest()
+    {
+        var restaurant = CreateDataModel(Guid.NewGuid().ToString(), null);
+        Assert.That(() => restaurant.Validate(), Throws.TypeOf<ValidationException>());
+        restaurant = CreateDataModel(Guid.NewGuid().ToString(), string.Empty);
+        Assert.That(() => restaurant.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var restaurantId = Guid.NewGuid().ToString();
+        var restaurantName = "name";
+        var prevRestaurantName = "prevRestaurantName";
+        var prevPrevRestaurantName = "prevPrevRestaurantName";
+        var restaurant = CreateDataModel(restaurantId, restaurantName, prevRestaurantName, prevPrevRestaurantName);
+        Assert.That(() => restaurant.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(restaurant.Id, Is.EqualTo(restaurantId));
+            Assert.That(restaurant.RestaurantName, Is.EqualTo(restaurantName));
+            Assert.That(restaurant.PrevRestaurantName, Is.EqualTo(prevRestaurantName));
+            Assert.That(restaurant.PrevPrevRestaurantName, Is.EqualTo(prevPrevRestaurantName));
+        });
+    }
+
+    private static RestaurantDataModel CreateDataModel(string? Id, string? restaurantName, string? prevRestaurantName = null, string? prevPrevRestaurantName = null) =>
+      new(Id, restaurantName, prevRestaurantName, prevPrevRestaurantName);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/SalaryDataModelTests.cs

@@ -0,0 +1,52 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class SalaryDataModelTests
+{
+    [Test]
+    public void WorkerIdIsEmptyTest()
+    {
+        var salary = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var salary = CreateDataModel("workerId", DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, 0);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var salaryDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var workerSalary = 10;
+        var salary = CreateDataModel(workerId, salaryDate, workerSalary);
+        Assert.That(() => salary.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(salary.WorkerId, Is.EqualTo(workerId));
+            Assert.That(salary.SalaryDate, Is.EqualTo(salaryDate));
+            Assert.That(salary.Salary, Is.EqualTo(workerSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateDataModel(string? workerId, DateTime salaryDate, double workerSalary) =>
+        new(workerId, salaryDate, workerSalary);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/SaleDataModelTests.cs

@@ -0,0 +1,93 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class SaleDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var sale = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "employeeId", Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void RestaurantIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "restaurantId", 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, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, null);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var workerId = Guid.NewGuid().ToString();
+        var restaurantId = Guid.NewGuid().ToString();
+        var sum = 10;
+        var isCancel = true;
+        var products = CreateSubDataModel();
+        var sale = CreateDataModel(saleId, workerId, restaurantId, sum, isCancel, products);
+        Assert.That(() => sale.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(sale.Id, Is.EqualTo(saleId));
+            Assert.That(sale.WorkerId, Is.EqualTo(workerId));
+            Assert.That(sale.RestaurantId, Is.EqualTo(restaurantId));
+            Assert.That(sale.Sum, Is.EqualTo(sum));
+            Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
+            Assert.That(sale.Products, Is.EquivalentTo(products));
+        });
+    }
+
+    private static SaleDataModel CreateDataModel(string? id, string? workerId, string? restaurantId, double sum, bool isCancel, List<SaleProductDataModel>? products) =>
+    new(id, workerId, restaurantId, sum, isCancel, products);
+
+    private static List<SaleProductDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/SaleProductDataModelTests.cs

@@ -0,0 +1,68 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class SaleProductDataModelTests
+{
+    [Test]
+    public void SaleIdIsNullOrEmptyTest()
+    {
+        var saleProduct = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SaleIdIsNotGuidTest()
+    {
+        var saleProduct = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), "productId", 10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        saleProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var productId = Guid.NewGuid().ToString();
+        var count = 10;
+        var saleProduct = CreateDataModel(saleId, productId, count);
+        Assert.That(() => saleProduct.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleProduct.SaleId, Is.EqualTo(saleId));
+            Assert.That(saleProduct.ProductId, Is.EqualTo(productId));
+            Assert.That(saleProduct.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static SaleProductDataModel CreateDataModel(string? saleId, string? productId, int count) =>
+        new(saleId, productId, count);
+}

SPiluSZharuProject/SPiluSZharuTests/DataModelTests/WorkerDataModelTests.cs

@@ -0,0 +1,108 @@
+using SPiluSZharuContracts.DataModels;
+using SPiluSZharuContracts.Exceptions;
+
+namespace SPiluSZharuTests.DataModelTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", null, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", string.Empty, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsIncorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", "777", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-16).AddDays(-1), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-14), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var fio = "fio";
+        var postId = Guid.NewGuid().ToString();
+        var phoneNumber = "+7(777)777-77-77";
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, phoneNumber, birthDate, employmentDate, isDelete);
+        Assert.That(() => worker.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(worker.Id, Is.EqualTo(workerId));
+            Assert.That(worker.FIO, Is.EqualTo(fio));
+            Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.PhoneNumber, Is.EqualTo(phoneNumber));
+            Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
+            Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
+        });
+    }
+
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, string? phoneNumber, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, postId, phoneNumber, birthDate, employmentDate, isDeleted);
+}

SPiluSZharuProject/SPiluSZharuTests/SPiluSZharuTests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.4.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SPiluSZharuContracts\SPiluSZharuContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>