TheCyclopsProject/TheCyclopsContracts/DataModels/ComponentDataModel.cs

@@ -0,0 +1,38 @@
+using TheCyclopsContracts.Enums;
+using TheCyclopsContracts.Exceptions;
+using TheCyclopsContracts.Extensions;
+using TheCyclopsContracts.Infrastructure;
+
+namespace TheCyclopsContracts.DataModels;
+
+public class ComponentDataModel(string id, string componentName,
+    ComponentType componentType, double price, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string ComponentName { get; private set; } = componentName;
+
+    public ComponentType ComponentType { get; private set; } = componentType;
+
+    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 (ComponentName.IsEmpty())
+            throw new ValidationException("Field ComponentName is empty");
+
+        if (ComponentType == ComponentType.None)
+            throw new ValidationException("Field ComponentType is empty");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

TheCyclopsProject/TheCyclopsContracts/DataModels/EmployeeDataModel.cs

@@ -0,0 +1,57 @@
+using System.Text.RegularExpressions;
+using TheCyclopsContracts.Exceptions;
+using TheCyclopsContracts.Extensions;
+using TheCyclopsContracts.Infrastructure;
+
+namespace TheCyclopsContracts.DataModels;
+
+public class EmployeeDataModel(string id, string fio, string email, string postId,
+    DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string Email { get; private set; } = email;
+
+    public string PostId { get; private set; } = postId;
+
+    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 (Email.IsEmpty())
+            throw new ValidationException("Field Email is empty");
+
+        if (!Regex.IsMatch(Email, @"^\S+@\S+\.\S+$"))
+            throw new ValidationException("Field Email is not an email address");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
+            throw new ValidationException($"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)
+            throw new ValidationException($"Minors cannot be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+    }
+}

TheCyclopsProject/TheCyclopsContracts/DataModels/InstallationComponentDataModel.cs

@@ -0,0 +1,33 @@
+using TheCyclopsContracts.Exceptions;
+using TheCyclopsContracts.Extensions;
+using TheCyclopsContracts.Infrastructure;
+
+namespace TheCyclopsContracts.DataModels;
+
+public class InstallationComponentDataModel(string installationId,
+    string componentId, int count) : IValidation
+{
+    public string InstallationId { get; private set; } = installationId;
+
+    public string ComponentId { get; private set; } = componentId;
+
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (InstallationId.IsEmpty())
+            throw new ValidationException("Field InstallationId is empty");
+
+        if (!InstallationId.IsGuid())
+            throw new ValidationException("The value in the field InstallationId is not a unique identifier");
+
+        if (ComponentId.IsEmpty())
+            throw new ValidationException("Field ComponentId is empty");
+
+        if (!ComponentId.IsGuid())
+            throw new ValidationException("The value in the field ComponentId is not a unique identifier");
+
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

TheCyclopsProject/TheCyclopsContracts/DataModels/InstallationDataModel.cs

@@ -0,0 +1,50 @@
+using TheCyclopsContracts.Exceptions;
+using TheCyclopsContracts.Extensions;
+using TheCyclopsContracts.Infrastructure;
+
+namespace TheCyclopsContracts.DataModels;
+
+public class InstallationDataModel(string id, string employeeId,
+    DateTime installationDate, double installationPrice, double sum, bool isCanceled, 
+    List<InstallationComponentDataModel> components) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string EmployeeId { get; private set; } = employeeId;
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+
+    public DateTime InstallationDate { get; private set; } = installationDate;
+
+    public double InstallationPrice { get; private set; } = installationPrice;
+
+    public double Sum { get; private set; } = sum;
+
+    public bool IsCanceled { get; private set; } = isCanceled;
+
+    public List<InstallationComponentDataModel> Components { get; private set; } = components;
+
+    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 (EmployeeId.IsEmpty())
+            throw new ValidationException("Field EmployeeId is empty");
+
+        if (!EmployeeId.IsGuid())
+            throw new ValidationException("The value in the field EmployeeId is not a unique identifier");
+
+        if (InstallationPrice <= 0)
+            throw new ValidationException("Field InstallationPrice is less than or equal to 0");
+
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+
+        if ((Components?.Count ?? 0) == 0)
+            throw new ValidationException("The installation must include components");
+    }
+}

TheCyclopsProject/TheCyclopsContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,46 @@
+using TheCyclopsContracts.Enums;
+using TheCyclopsContracts.Exceptions;
+using TheCyclopsContracts.Extensions;
+
+namespace TheCyclopsContracts.DataModels;
+
+public class PostDataModel(string id, string PostId, string postName, PostType postType, double salary, bool isActual, DateTime changeDate)
+{
+    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");
+    }
+}

TheCyclopsProject/TheCyclopsContracts/DataModels/SalaryDataModel.cs

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

TheCyclopsProject/TheCyclopsContracts/Enums/ComponentType.cs

@@ -0,0 +1,11 @@
+namespace TheCyclopsContracts.Enums;
+
+public enum ComponentType
+{
+    None = 0,
+    Camera = 1,
+    Sensor = 2,
+    ContropPanel = 3,
+    Cable = 4,
+    Other = 5
+}

TheCyclopsProject/TheCyclopsContracts/Enums/PostType.cs

@@ -0,0 +1,10 @@
+namespace TheCyclopsContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Designer = 1,
+    Installer = 2,
+    Seller = 3,
+    Administrator = 4
+}

TheCyclopsProject/TheCyclopsContracts/Exceptions/ValidationException.cs

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

TheCyclopsProject/TheCyclopsContracts/Extensions/StringExtensions.cs

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

TheCyclopsProject/TheCyclopsContracts/Infrastructure/IValidation.cs

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

TheCyclopsProject/TheCyclopsProject.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.12.35707.178 d17.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TheCyclopsContracts", "TheCyclopsContracts\TheCyclopsContracts.csproj", "{01934235-715E-4B95-B859-48E8C89DA7CB}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TheCyclopsTests", "TheCyclopsTests\TheCyclopsTests.csproj", "{78C9F1B1-ABD3-4ED2-A5DC-84766DEEFC77}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{01934235-715E-4B95-B859-48E8C89DA7CB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{01934235-715E-4B95-B859-48E8C89DA7CB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{01934235-715E-4B95-B859-48E8C89DA7CB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{78C9F1B1-ABD3-4ED2-A5DC-84766DEEFC77}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{78C9F1B1-ABD3-4ED2-A5DC-84766DEEFC77}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{78C9F1B1-ABD3-4ED2-A5DC-84766DEEFC77}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{78C9F1B1-ABD3-4ED2-A5DC-84766DEEFC77}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

TheCyclopsProject/TheCyclopsTests/DataModelsTests/ComponentDataModelTests.cs

@@ -0,0 +1,80 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Enums;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.DataModelsTests;
+
+[TestFixture]
+internal class ComponentDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var component = CreateDataModel(null, "name", ComponentType.Other, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+
+        component = CreateDataModel(string.Empty, "name", ComponentType.Other, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var component = CreateDataModel("id", "name", ComponentType.Other, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsEmptyTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), null, ComponentType.Other, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+
+        component = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ComponentType.Other, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentTypeIsNoneTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), null, ComponentType.None, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Other, 0, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+
+        component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Other, -10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var componentId = Guid.NewGuid().ToString();
+        var componentName = "name";
+        var componentType = ComponentType.Other;
+        var componentManufacturerId = Guid.NewGuid().ToString();
+        var componentPrice = 10;
+        var componentIsDelete = false;
+        var component = CreateDataModel(componentId, componentName, componentType, componentPrice, componentIsDelete);
+
+        Assert.That(() => component.Validate(), Throws.Nothing);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(component.Id, Is.EqualTo(componentId));
+            Assert.That(component.ComponentName, Is.EqualTo(componentName));
+            Assert.That(component.ComponentType, Is.EqualTo(componentType));
+            Assert.That(component.Price, Is.EqualTo(componentPrice));
+            Assert.That(component.IsDeleted, Is.EqualTo(componentIsDelete));
+        });
+    }
+
+    private static ComponentDataModel CreateDataModel(string? id, string? componentName,
+        ComponentType componentType, double price, bool isDeleted) =>
+        new(id, componentName, componentType, price, isDeleted);
+}

TheCyclopsProject/TheCyclopsTests/DataModelsTests/EmployeeDataModelTests.cs

@@ -0,0 +1,130 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.DataModelsTests;
+
+[TestFixture]
+internal class EmployeeDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var employee = CreateDataModel(null, "fio", "mail@mail.com", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+
+        employee = CreateDataModel(null, "fio", "mail@mail.com", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var employee = CreateDataModel("id", "fio", "mail@mail.com", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), null, "mail@mail.com", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+
+        employee = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "mail@mail.com", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsNullOrEmptyTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+
+        employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmailIsIncorrectTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail", Guid.NewGuid().ToString(),
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com", null,
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+
+        employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com", string.Empty,
+            DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com",
+            "postId", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1), false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+
+        employee = CreateDataModel(Guid.NewGuid().ToString(), "fio", "mail@mail.com",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-16), false);
+        Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var employeeId = Guid.NewGuid().ToString();
+        var fio = "fio";
+        var email = "mail@mail.com";
+        var postId = Guid.NewGuid().ToString();
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDeleted = false;
+        var employee = CreateDataModel(employeeId, fio, email, postId, birthDate, employmentDate, isDeleted);
+
+        Assert.That(() => employee.Validate(), Throws.Nothing);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(employee.Id, Is.EqualTo(employeeId));
+            Assert.That(employee.FIO, Is.EqualTo(fio));
+            Assert.That(employee.Email, Is.EqualTo(email));
+            Assert.That(employee.PostId, Is.EqualTo(postId));
+            Assert.That(employee.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(employee.EmploymentDate, Is.EqualTo(employmentDate));
+            Assert.That(employee.IsDeleted, Is.EqualTo(isDeleted));
+        });
+    }
+
+    private static EmployeeDataModel CreateDataModel(string? id, string? fio, string? email,
+        string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, email, postId, birthDate, employmentDate, isDeleted);
+}

TheCyclopsProject/TheCyclopsTests/DataModelsTests/InstallationComponentDataModelTests.cs

@@ -0,0 +1,73 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.DataModelsTests;
+
+[TestFixture]
+internal class InstallationComponentDataModelTests
+{
+    [Test]
+    public void InstallationIdIsNullOrEmptyTest()
+    {
+        var installationComponent = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+
+        installationComponent = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void InstallationIdIsNotGuidTest()
+    {
+        var installationComponent = CreateDataModel("installationId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNullOrEmptyTest()
+    {
+        var installationComponent = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+
+        installationComponent = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNotGuidTest()
+    {
+        var installationComponent = CreateDataModel(Guid.NewGuid().ToString(), "componentId", 10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var installationComponent = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+
+        installationComponent = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => installationComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var installationId = Guid.NewGuid().ToString();
+        var componentId = Guid.NewGuid().ToString();
+        var count = 10;
+        var installationComponent = CreateDataModel(installationId, componentId, count);
+
+        Assert.That(() => installationComponent.Validate(), Throws.Nothing);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(installationComponent.InstallationId, Is.EqualTo(installationId));
+            Assert.That(installationComponent.ComponentId, Is.EqualTo(componentId));
+            Assert.That(installationComponent.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static InstallationComponentDataModel CreateDataModel(string? installationId, string? componentId, int count) =>
+        new(installationId, componentId, count);
+}

TheCyclopsProject/TheCyclopsTests/DataModelsTests/InstallationDataModelTests.cs

@@ -0,0 +1,116 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.DataModelsTests;
+
+[TestFixture]
+internal class InstallationDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var installation = CreateDataModel(null, Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+
+        installation = CreateDataModel(string.Empty, Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var installation = CreateDataModel("id", Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmployeeIdIsNullOrEmptyTest()
+    {
+        var installation = CreateDataModel(Guid.NewGuid().ToString(), null,
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+
+        installation = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void EmployeeIdIsNotGuidTest()
+    {
+        var installation = CreateDataModel(Guid.NewGuid().ToString(), "employeeId",
+            DateTime.UtcNow, 10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void InstallationPriceIsLessOrZeroTest()
+    {
+        var installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 0, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+
+        installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, -10, 20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 0, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+
+        installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, -20, false, CreateSubDataModel());
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 20, false, null);
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+
+        installation = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            DateTime.UtcNow, 10, 20, false, []);
+        Assert.That(() => installation.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var installationId = Guid.NewGuid().ToString();
+        var employeeId = Guid.NewGuid().ToString();
+        var installationPrice = 10;
+        var sum = 20;
+        var isCanceled = true;
+        var components = CreateSubDataModel();
+        var installation = CreateDataModel(installationId, employeeId,
+            DateTime.UtcNow, installationPrice, sum, isCanceled, components);
+
+        Assert.That(() => installation.Validate(), Throws.Nothing);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(installation.Id, Is.EqualTo(installationId));
+            Assert.That(installation.EmployeeId, Is.EqualTo(employeeId));
+            Assert.That(installation.Sum, Is.EqualTo(sum));
+            Assert.That(installation.IsCanceled, Is.EqualTo(isCanceled));
+            Assert.That(installation.Components, Is.EquivalentTo(components));
+        });
+    }
+
+    private static InstallationDataModel CreateDataModel(string id, string employeeId,
+        DateTime installationDate, double installationPrice, double sum, bool isCanceled,
+        List<InstallationComponentDataModel> components) =>
+        new(id, employeeId, installationDate, installationPrice, sum, isCanceled, components);
+
+    private static List<InstallationComponentDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

TheCyclopsProject/TheCyclopsTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,110 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Enums;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "post",
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "post",
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "post",
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "post",
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "post",
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "post",
+            PostType.Designer, 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.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty,
+            PostType.Designer, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "post",
+            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(), "post",
+            PostType.Designer, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "post",
+            PostType.Designer, -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.Designer;
+        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);
+}

TheCyclopsProject/TheCyclopsTests/DataModelsTests/SalaryDataModelTests.cs

@@ -0,0 +1,56 @@
+using TheCyclopsContracts.DataModels;
+using TheCyclopsContracts.Exceptions;
+
+namespace TheCyclopsTests.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("employeeId", 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 employeeId = Guid.NewGuid().ToString();
+        var salaryDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var employeeSalary = 10;
+        var salary = CreateDataModel(employeeId, salaryDate, employeeSalary);
+
+        Assert.That(() => salary.Validate(), Throws.Nothing);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(salary.EmployeeId, Is.EqualTo(employeeId));
+            Assert.That(salary.SalaryDate, Is.EqualTo(salaryDate));
+            Assert.That(salary.Salary, Is.EqualTo(employeeSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateDataModel(string? employeeId, DateTime salaryDate, double workerSalary) =>
+        new(employeeId, salaryDate, workerSalary);
+}

TheCyclopsProject/TheCyclopsTests/TheCyclopsTests.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="..\TheCyclopsContracts\TheCyclopsContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>