TheSweetBunsProject/SweetBunsContracts/DataModels/CookingDataModel.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace SweetBunsContracts.DataModels;
 
-public class CookingDataModell(string productId, int count) : IValidation
+public class CookingDataModel(string productId, int count) : IValidation
 {
     public string ProductId { get; private set; } = productId;
     public int Count { get; private set; } = count;

TheSweetBunsProject/SweetBunsContracts/DataModels/RecipeDataModel.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace SweetBunsContracts.DataModels;
 
-public class RecipeDataModel(string ingredientsId, string productId, int count) : IValidation
+public class RecipeDataModel(string ingredientsId, int count, string productId) : IValidation
 {
     public string IngredientsId { get; private set; } = ingredientsId;
     public int Count { get; private set; } = count;

TheSweetBunsProject/SweetBunsContracts/DataModels/SalaryDataModel.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace SweetBunsContracts.DataModels;
 
-public class SalaryDataModell(string workerId, DateTime salaryDate, double workerSalary) : IValidation
+public class SalaryDataModel(string workerId, DateTime salaryDate, double workerSalary) : IValidation
 {
     public string WorkerId { get; private set; } = workerId;
 

TheSweetBunsProject/SweetBunsContracts/DataModels/WorkerDataModel.cs

@@ -8,10 +8,12 @@ using System.Threading.Tasks;
 using static System.Runtime.InteropServices.JavaScript.JSType;
 using System.Xml;
 using SweetBunsContracts.Exceptions;
+using System.Numerics;
+using System.Text.RegularExpressions;
 
 namespace SweetBunsContracts.DataModels;
 
-public class WorkerDataModell(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+public class WorkerDataModel(string id, string fio, string postId, string email, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
 {
     public string Id { get; private set; } = id;
 
@@ -19,6 +21,8 @@ public class WorkerDataModell(string id, string fio, string postId, DateTime bir
 
     public string PostId { get; private set; } = postId;
 
+    public string Email { get; private set; } = email;
+
     public DateTime BirthDate { get; private set; } = birthDate;
 
     public DateTime EmploymentDate { get; private set; } = employmentDate;
@@ -40,6 +44,12 @@ public class WorkerDataModell(string id, string fio, string postId, DateTime bir
 
         if (!PostId.IsGuid())
             throw new ValidationException("The value in the field PostId is not a unique identifier");
+        
+        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 an email");
 
         if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
             throw new ValidationException($"Minors cannot be hired (BirthDate = {BirthDate.ToShortDateString()})");

TheSweetBunsProject/SweetBunsTests/DataModels Tests/CookingDataModelTests.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Exceptions;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class CookingDataModelTests
+{
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var cooking = CreateDataModel(string.Empty, 10);
+        Assert.That(() => cooking.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var cooking = CreateDataModel("id", 10);
+        Assert.That(() => cooking.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var cooking = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => cooking.Validate(), Throws.TypeOf<ValidationException>());
+        cooking = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => cooking.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var count = 10;
+        var cooking = CreateDataModel(productId, count);
+        Assert.That(() => cooking.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(cooking.ProductId, Is.EqualTo(productId));
+            Assert.That(cooking.Count, Is.EqualTo(count));
+        });
+    }
+    private static CookingDataModel CreateDataModel(string ProductId, int Count) => new(ProductId, Count);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/IngredientsDataModelTests.cs

@@ -0,0 +1,58 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class IngredientsDataModelTests
+{
+    [Test]
+    public void IdIsNullEmptyTest()
+    {
+        var ingredient = CreateDataModel(null, "name");
+        Assert.That(() => ingredient.Validate(), Throws.TypeOf<ValidationException>());
+        ingredient = CreateDataModel(string.Empty, "name");
+        Assert.That(() => ingredient.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var ingredient = CreateDataModel("id", "name");
+        Assert.That(() => ingredient.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IngredientNameIsNullOrEmptyTest()
+    {
+        var ingredient = CreateDataModel(Guid.NewGuid().ToString(), null);
+        Assert.That(() => ingredient.Validate(), Throws.TypeOf<ValidationException>());
+        ingredient = CreateDataModel(Guid.NewGuid().ToString(), string.Empty);
+        Assert.That(() => ingredient.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var ingredientId = Guid.NewGuid().ToString();
+        var ingredientName = "name";
+        var prevIngredientName = "prevIngredientName";
+        var prevPrevIngredientName = "prevPrevIngredientName";
+        var ingredient = CreateDataModel(ingredientId, ingredientName, prevIngredientName, prevPrevIngredientName);
+        Assert.That(() => ingredient.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(ingredient.Id, Is.EqualTo(ingredientId));
+            Assert.That(ingredient.IngredientName, Is.EqualTo(ingredientName));
+            Assert.That(ingredient.PrevIngredientName, Is.EqualTo(prevIngredientName));
+            Assert.That(ingredient.PrevPrevIngredientName, Is.EqualTo(prevPrevIngredientName));
+        });
+    }
+
+    private static IngredientsDataModel CreateDataModel(string? id, string? ingredientName, string? prevIngredientName = null, string? prevPrevIngredientName = null) => new(id, ingredientName, prevIngredientName, prevPrevIngredientName);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/PostDataModelTests.cs

@@ -0,0 +1,98 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Enums;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Production, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.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.Production, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Production, -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.Production;
+        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);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/ProductDataModelTests.cs

@@ -0,0 +1,95 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Enums;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class ProductDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Cookies, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name", ProductType.Cookies, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Cookies, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Cookies, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Cookies, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.None, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IngredientsIdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Cookies, null, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Cookies, string.Empty, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IngredientsIdIsNotGuidTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Cookies, "ingredientsId", 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Cookies, Guid.NewGuid().ToString(), 0, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Cookies, Guid.NewGuid().ToString(), -10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Cookies;
+        var productIngredientsId = Guid.NewGuid().ToString();
+        var productPrice = 10;
+        var productIsDelete = false;
+        var product = CreateDataModel(productId, productName, productType, productIngredientsId, 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.IngredientsId, Is.EqualTo(productIngredientsId));
+            Assert.That(product.Price, Is.EqualTo(productPrice));
+            Assert.That(product.IsDeleted, Is.EqualTo(productIsDelete));
+        });
+    }
+
+    private static ProductDataModel CreateDataModel(string? id, string? productName, ProductType productType, string? ingredientsId, double price, bool isDeleted) => new(id, productName, productType, ingredientsId, price, isDeleted);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/RecipeDataModelTests.cs

@@ -0,0 +1,72 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class RecipeDataModelTests
+{
+    [Test]
+    public void IngredientsIdIsNullOrEmptyTest()
+    {
+        var recipe = CreateDataModel(null, 10, Guid.NewGuid().ToString());
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+        recipe = CreateDataModel(string.Empty, 10, Guid.NewGuid().ToString());
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IngredientsIdIsNotGuidTest()
+    {
+        var recipe = CreateDataModel("id", 10, Guid.NewGuid().ToString());
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var recipe = CreateDataModel(Guid.NewGuid().ToString(), 0, Guid.NewGuid().ToString());
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+        recipe = CreateDataModel(Guid.NewGuid().ToString(), -10, Guid.NewGuid().ToString());
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var recipe = CreateDataModel(Guid.NewGuid().ToString(), 10, null);
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+        recipe = CreateDataModel(Guid.NewGuid().ToString(), 10, string.Empty);
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var recipe = CreateDataModel(Guid.NewGuid().ToString(), 10, "id");
+        Assert.That(() => recipe.Validate(), Throws.TypeOf<ValidationException>());
+    }   
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var ingredientsId = Guid.NewGuid().ToString();
+        var count = 10;
+        var productId = Guid.NewGuid().ToString();
+        var recipe = CreateDataModel(ingredientsId, count, productId);
+        Assert.That(() => recipe.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(recipe.IngredientsId, Is.EqualTo(ingredientsId));
+            Assert.That(recipe.Count, Is.EqualTo(count));
+            Assert.That(recipe.ProductId, Is.EqualTo(productId));            
+        });
+    }
+
+    private static RecipeDataModel CreateDataModel(string? ingredientsId, int count, string? productId) => new(ingredientsId, count, productId);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/SalaryDataModelTests.cs

@@ -0,0 +1,56 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[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 WorkerSalaryIsLessOrZeroTest()
+    {
+        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);
+}

TheSweetBunsProject/SweetBunsTests/DataModels Tests/WorkerDataModelTests.cs

@@ -0,0 +1,112 @@
+using SweetBunsContracts.DataModels;
+using SweetBunsContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SweetBunsTests.DataModels_Tests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), "email@email.com", 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(), "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);        
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), "email@email.com", 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", null, "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }    
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", "postId", "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), null, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), string.Empty, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsIncorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "edww@dqd,com", 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", Guid.NewGuid().ToString(), "email@email.com", 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(), "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "email@email.com", DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-16), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var fio = "fio";
+        var postId = Guid.NewGuid().ToString();
+        var email = "email@email.com";
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, email, 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.Email, Is.EqualTo(email));
+            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? email, DateTime birthDate, DateTime employmentDate, bool isDeleted) => new(id, fio, postId, email, birthDate, employmentDate, isDeleted);
+}

TheSweetBunsProject/SweetBunsTests/SweetBunsTests.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="..\SweetBunsContracts\SweetBunsContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

TheSweetBunsProject/TheSweetBunsProject.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}") = "SweetBunsContracts", "SweetBunsContracts\SweetBunsContracts.csproj", "{EC2711C2-3C5B-4B61-B205-33C87C822197}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SweetBunsTests", "SweetBunsTests\SweetBunsTests.csproj", "{94AE5144-46DE-4C5A-AE9D-854B84A4ACD2}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{EC2711C2-3C5B-4B61-B205-33C87C822197}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC2711C2-3C5B-4B61-B205-33C87C822197}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EC2711C2-3C5B-4B61-B205-33C87C822197}.Release|Any CPU.Build.0 = Release|Any CPU
+		{94AE5144-46DE-4C5A-AE9D-854B84A4ACD2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{94AE5144-46DE-4C5A-AE9D-854B84A4ACD2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{94AE5144-46DE-4C5A-AE9D-854B84A4ACD2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{94AE5144-46DE-4C5A-AE9D-854B84A4ACD2}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE