North_Bridge/North_Bridge.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.7.34024.191
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "North_Bridge_Contract", "North_Bridge_Contract\North_Bridge_Contract.csproj", "{ED71153A-12DC-4E38-8BF8-1845F1D1D950}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "North_Bridge_Tests", "North_Bridge_Tests\North_Bridge_Tests.csproj", "{D77A42DA-D116-49A5-A735-95B5AC7B6D5D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{ED71153A-12DC-4E38-8BF8-1845F1D1D950}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{ED71153A-12DC-4E38-8BF8-1845F1D1D950}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{ED71153A-12DC-4E38-8BF8-1845F1D1D950}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D77A42DA-D116-49A5-A735-95B5AC7B6D5D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D77A42DA-D116-49A5-A735-95B5AC7B6D5D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D77A42DA-D116-49A5-A735-95B5AC7B6D5D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D77A42DA-D116-49A5-A735-95B5AC7B6D5D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

North_Bridge/North_Bridge_Contract/DataModels/PostDataModel.cs

@@ -0,0 +1,58 @@
+using North_Bridge_Contract.Infrastructure;
+using North_Bridge_Contract.Enums;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class PostDataModel : IValidation
+{
+    public string Id { get; private set; }
+
+    public string PostId { get; private set; }
+
+    public string PostName { get; private set; }
+
+    public PostType PostType { get; private set; }
+
+    public double Salary { get; private set; }
+
+    public bool IsActual { get; private set; }
+
+    public DateTime ChangeDate { get; private set; }
+
+    public PostDataModel(string id, string postId, string postName, PostType postType, double salary, bool isActual, DateTime changeDate)
+    {
+        Id = id;
+        PostId = postId;
+        PostName = postName;
+        PostType = postType;
+        Salary = salary;
+        IsActual = isActual;
+        ChangeDate = 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");
+    }
+}

North_Bridge/North_Bridge_Contract/DataModels/ProductDataModel.cs

@@ -0,0 +1,46 @@
+using North_Bridge_Contract.Enums;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class ProductDataModel : IValidation
+{
+    public string Id { get; private set; }
+
+    public string ProductName { get; private set; }
+
+    public ProductType ProductType { get; private set; }
+
+    public double Price {  get; private set; }
+
+    public bool IsDeleted { get; private set; }
+
+    public ProductDataModel(string id, string productName, ProductType productType, double price, bool isDeleted)
+    {
+        Id = id;
+        ProductName = productName;
+        ProductType = productType;
+        Price = price;
+        IsDeleted = 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");
+    }
+}

North_Bridge/North_Bridge_Contract/DataModels/ProductForSaleDataModel.cs

@@ -0,0 +1,39 @@
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class ProductForSaleDataModel : IValidation
+{
+    public string SaleId { get; private set; }
+
+    public string ProductId { get; private set; }
+
+    public int Count { get; private set; }
+
+    public ProductForSaleDataModel(string saleId, string productId, int count)
+    {
+        SaleId = saleId;
+        ProductId = productId;
+        Count = 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");
+    }
+}

North_Bridge/North_Bridge_Contract/DataModels/ProductHistoryDataModel.cs

@@ -0,0 +1,33 @@
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class ProductHistoryDataModel : IValidation
+{
+    public string ProductId { get; private set; }
+
+    public double OldPrice { get; private set; }
+
+    public DateTime ChangeDate { get; private set; }
+
+    public ProductHistoryDataModel(string productId, double oldPrice)
+    {
+        ProductId = productId;
+        OldPrice = oldPrice;
+        ChangeDate = 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");
+    }
+}

North_Bridge/North_Bridge_Contract/DataModels/SalaryDataModel.cs

@@ -0,0 +1,33 @@
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class SalaryDataModel : IValidation
+{
+    public string WorkerId { get; private set; }
+
+    public DateTime SalaryDate { get; private set; }
+
+    public double Salary {  get; private set; }
+
+    public SalaryDataModel(string workerId, DateTime salaryDate, double salary)
+    {
+        WorkerId = workerId;
+        SalaryDate = salaryDate;
+        Salary = salary;
+    }
+
+    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");
+    }
+}

North_Bridge/North_Bridge_Contract/DataModels/SaleDataModel.cs

@@ -0,0 +1,50 @@
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+
+namespace North_Bridge_Contract.DataModels;
+
+public class SaleDataModel : IValidation
+{
+    public string Id { get; private set; }
+
+    public string WorkerId { get; private set; }
+
+    public DateTime SaleDate { get; private set; }
+
+    public double Sum { get; private set; }
+
+    public bool IsCancel { get; private set; }
+
+    public List<ProductForSaleDataModel> Products { get; private set; }
+
+    public SaleDataModel(string id, string workerId, double sum, bool isCancel, List<ProductForSaleDataModel> products)
+    {
+        Id = id;
+        WorkerId = workerId;
+        Sum = sum;
+        IsCancel = isCancel;
+        Products = 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 (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");
+    } 
+}

North_Bridge/North_Bridge_Contract/DataModels/WorkerDataModel.cs

@@ -0,0 +1,66 @@
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using North_Bridge_Contract.Infrastructure;
+using System.Text.RegularExpressions;
+namespace North_Bridge_Contract.DataModels;
+
+public class WorkerDataModel : IValidation
+{
+    public string Id { get; private set; }
+
+    public string FIO { get; private set; }
+
+    public string Email { get; private set; }
+
+    public string PostId { get; private set; }
+
+    public DateTime BirthDate { get; private set; }
+
+    public DateTime EmploymentDate { get; private set; }
+
+    public bool IsDeleted { get; private set; }
+
+    public WorkerDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted)
+    {
+        Id = id;
+        FIO = fio;
+        Email = email;
+        PostId = postId;
+        BirthDate = birthDate;
+        EmploymentDate = employmentDate;
+        IsDeleted = 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 (Email.IsEmpty())
+            throw new ValidationException("Field Email is empty");
+
+        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+            throw new ValidationException("Field Email is not a valid email address");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (BirthDate.Date > DateTime.Now.AddYears(-18).Date)
+            throw new ValidationException($"Only adults can 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 < 18)
+            throw new ValidationException($"Only adults can be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+    }
+}

North_Bridge/North_Bridge_Contract/Enums/PostType.cs

@@ -0,0 +1,11 @@
+
+namespace North_Bridge_Contract.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Supervisor = 1,
+    Cashier = 2,
+    Loader = 3,
+    Consultant = 4
+}

North_Bridge/North_Bridge_Contract/Enums/ProductType.cs

@@ -0,0 +1,12 @@
+
+namespace North_Bridge_Contract.Enums;
+
+[Flags]
+public enum ProductType
+{
+    None = 0,
+    SystemUnit = 1,
+    Monitor = 2,
+    ComputerMouse = 4,
+    AudioSystem = 8
+}

North_Bridge/North_Bridge_Contract/Exceptions/ValidationException.cs

@@ -0,0 +1,10 @@
+
+namespace North_Bridge_Contract.Exceptions;
+
+public class ValidationException : Exception
+{
+    public ValidationException(string message) : base(message)
+    {
+
+    }
+}

North_Bridge/North_Bridge_Contract/Extentions/StringExtentions.cs

@@ -0,0 +1,16 @@
+
+namespace North_Bridge_Contract.Extentions;
+
+public static class StringExtentions
+{
+
+    public static bool IsEmpty(this string str)
+    {
+        return string.IsNullOrWhiteSpace(str);
+    }
+
+    public static bool IsGuid(this string str)
+    {
+        return Guid.TryParse(str, out _);
+    }
+}

North_Bridge/North_Bridge_Contract/Infrastructure/IValidation.cs

@@ -0,0 +1,7 @@
+
+namespace North_Bridge_Contract.Infrastructure;
+
+public interface IValidation
+{
+    void Validate();
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,106 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Enums;
+using North_Bridge_Contract.Exceptions;
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Consultant, 10000, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Loader, 10500, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Cashier, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Cashier, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Cashier, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Cashier, 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.Cashier, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(),
+        Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Cashier, 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.Cashier, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Cashier, -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.Cashier;
+        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);
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/ProductDataModelTests.cs

@@ -0,0 +1,87 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Enums;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class ProductDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Monitor, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name",
+        ProductType.Monitor, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Monitor, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null,
+        ProductType.Monitor, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        ProductType.Monitor, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null,
+        ProductType.None, 10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name",
+        ProductType.Monitor, 0, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Monitor, -10, false);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Monitor;
+        var productPrice = 10;
+        var productIsDelete = false;
+        var product = CreateDataModel(productId, productName, productType, productPrice, productIsDelete);
+        Assert.That(() => product.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(product.Id, Is.EqualTo(productId));
+            Assert.That(product.ProductName, Is.EqualTo(productName));
+            Assert.That(product.ProductType, Is.EqualTo(productType));
+            Assert.That(product.Price, Is.EqualTo(productPrice));
+            Assert.That(product.IsDeleted, Is.EqualTo(productIsDelete));
+        });
+    }
+
+    private static ProductDataModel CreateDataModel(string? id, string?
+    productName, ProductType productType, double price, bool
+    isDeleted) => new (id, productName, productType, price, isDeleted);
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/ProductForSaleDataModelTests.cs

@@ -0,0 +1,76 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class ProductForSaleDataModelTests
+{
+    [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 ProductForSaleDataModel CreateDataModel(string? saleId, string?
+    productId, int count) => new(saleId, productId, count);
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/ProductHistoryDataModelTests.cs

@@ -0,0 +1,58 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class ProductHistoryDataModelTests
+{
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", 10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => product.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var oldPrice = 10;
+        var productHistory = CreateDataModel(productId, oldPrice);
+        Assert.That(() => productHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(productHistory.ProductId, Is.EqualTo(productId));
+            Assert.That(productHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(productHistory.ChangeDate,
+            Is.LessThan(DateTime.UtcNow));
+            Assert.That(productHistory.ChangeDate,
+            Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+
+    private static ProductHistoryDataModel CreateDataModel(string? productId, double oldPrice) => new(productId, oldPrice);
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/SalaryDataModelTests.cs

@@ -0,0 +1,57 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[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);
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/SaleDataModelTestscs.cs

@@ -0,0 +1,92 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class SaleDataModelTestscs
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var sale = CreateDataModel("id", Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId", 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(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(), 10, false, null);
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(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 sum = 10;
+        var isCancel = true;
+        var products = CreateSubDataModel();
+        var sale = CreateDataModel(saleId, workerId, 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.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, double sum, bool isCancel, List<ProductForSaleDataModel>? products) =>
+    new(id, workerId, sum, isCancel, products);
+
+    private static List<ProductForSaleDataModel> CreateSubDataModel()
+    => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

North_Bridge/North_Bridge_Tests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,124 @@
+using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+
+namespace North_Bridge_Tests.DataModelsTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", null, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", string.Empty, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", "postId", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1), false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-16), false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsIncorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "example", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var fio = "fio";
+        var Email = "example@example.com";
+        var postId = Guid.NewGuid().ToString();
+        var birthDate = DateTime.Now.AddYears(-18).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, Email, postId, birthDate, employmentDate, isDelete);
+        Assert.That(() => worker.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(worker.Id, Is.EqualTo(workerId));
+            Assert.That(worker.FIO, Is.EqualTo(fio));
+            Assert.That(worker.Email, Is.EqualTo(Email));
+            Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
+            Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
+        });
+    }
+
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? email,
+    string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+    new(id, fio, email, postId, birthDate, employmentDate, isDeleted);
+}

North_Bridge/North_Bridge_Tests/North_Bridge_Tests.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\North_Bridge_Contract\North_Bridge_Contract.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>