TheSoftBedProject/SoftBedContracts/DataModels/CollectDataModel.cs

@@ -0,0 +1,42 @@
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+
+public class CollectDataModel(string id, string workerId, string furnitureId, double sum) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string WorkerId { get; private set; } = workerId;
+
+    public string FurnitureId { get; private set; } = furnitureId;
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+
+    public double Sum { get; private set; } = sum;
+
+    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 (FurnitureId.IsEmpty())
+            throw new ValidationException("Field FurnitureId is empty");
+
+        if (!FurnitureId.IsGuid())
+            throw new ValidationException("The value in the field FurnitureId is not a unique identifier");
+
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/FurnitureDataModel.cs

@@ -0,0 +1,42 @@
+using SoftBedContracts.Enums;
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+
+public class FurnitureDataModel(string id, string furnitureName, FurnitureType furnitureType, double price, bool isDeleted, List<FurnitureWorkPieceDataModel> workPieces) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FurnitureName { get; private set; } = furnitureName;
+
+    public FurnitureType FurnitureType { get; private set; } = furnitureType;
+
+    public double Price { get; private set; } = price;
+
+    public bool IsDeleted { get; private set; } = isDeleted;
+
+    public List<FurnitureWorkPieceDataModel> WorkPieces { get; private set; } = workPieces;
+
+    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 (FurnitureName.IsEmpty())
+            throw new ValidationException("Field FurnitureName is empty");
+
+        if (FurnitureType == FurnitureType.None)
+            throw new ValidationException("Field FurnitureType is empty");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+
+        if ((WorkPieces?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include Work Pieces");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/FurnitureHistoryDataModel.cs

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

TheSoftBedProject/SoftBedContracts/DataModels/FurnitureWorkPieceDataModel.cs

@@ -0,0 +1,31 @@
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+public class FurnitureWorkPieceDataModel(string furnitureId, string workPieceId, int count) : IValidation
+{
+    public string FurnitureId { get; private set; } = furnitureId;
+
+    public string WorkPieceId { get; private set; } = workPieceId;
+
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (FurnitureId.IsEmpty())
+            throw new ValidationException("Field FurnitureId is empty");
+
+        if (!FurnitureId.IsGuid())
+            throw new ValidationException("The value in the field FurnitureId is not a unique identifier");
+
+        if (WorkPieceId.IsEmpty())
+            throw new ValidationException("Field WorkPieceId is empty");
+
+        if (!WorkPieceId.IsGuid())
+            throw new ValidationException("The value in the field WorkPieceId is not a unique identifier");
+
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,39 @@
+using SoftBedContracts.Enums;
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+
+public class PostDataModel(string id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    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 (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");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/SalaryDataModel.cs

@@ -0,0 +1,26 @@
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+
+public class SalaryDataModel(string workerId, DateTime salaryDate, double salary) : IValidation
+{
+    public string WorkerId { get; private set; } = workerId;
+
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+
+    public double Salary { get; private set; } = 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");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/WorkPieceDataModel.cs

@@ -0,0 +1,33 @@
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+using System.Text.RegularExpressions;
+
+namespace SoftBedContracts.DataModels;
+
+public class WorkPieceDataModel(string id, string size, double weight) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string Size { get; private set; } = size;
+
+    public double Weight { get; private set; } = weight;
+
+    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 (Size.IsEmpty())
+            throw new ValidationException("Field Size is empty");
+
+        if (!Regex.IsMatch(Size, @"^\d+x\d+$"))
+            throw new ValidationException("Field Size has an invalid format. Expected format: number x number (e.g., '120x50').");
+
+        if (Weight <= 0)
+            throw new ValidationException("Field Weight is less than or equal to 0");
+    }
+}

TheSoftBedProject/SoftBedContracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,45 @@
+using SoftBedContracts.Exceptions;
+using SoftBedContracts.Extensions;
+using SoftBedContracts.Infrastructure;
+
+namespace SoftBedContracts.DataModels;
+
+public class WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string PostId { get; private set; } = postId;
+
+    public DateTime BirthDate { get; private set; } = birthDate;
+
+    public DateTime EmploymentDate { get; private set; } = employmentDate;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (BirthDate.Date > DateTime.Now.AddYears(-18).Date)
+            throw new ValidationException($"Minors cannot be hired (BirthDate = {BirthDate.ToShortDateString()})");
+
+        if (EmploymentDate.Date < BirthDate.Date)
+            throw new ValidationException("The date of employment cannot be less than the date of birth");
+
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 18) // EmploymentDate.Year - BirthDate.Year
+            throw new ValidationException($"Minors cannot be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+    }
+}

TheSoftBedProject/SoftBedContracts/Enums/FurnitureType.cs

@@ -0,0 +1,9 @@
+namespace SoftBedContracts.Enums;
+
+public enum FurnitureType
+{
+    None = 0,
+    UpholsteredFurniture = 1,
+    CabinetFurniture = 2,
+    FoldingFurniture = 3
+}

TheSoftBedProject/SoftBedContracts/Enums/MaterialType.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SoftBedContracts.Enums
+{
+    internal class MaterialType
+    {
+    }
+}

TheSoftBedProject/SoftBedContracts/Enums/PostType.cs

@@ -0,0 +1,9 @@
+namespace SoftBedContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Assembler = 1,
+    Loader = 2,
+    Assistent = 3
+}

TheSoftBedProject/SoftBedContracts/Exceptions/ValidationException.cs

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

TheSoftBedProject/SoftBedContracts/Extensions/StringExtensions.cs

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

TheSoftBedProject/SoftBedContracts/Infrastructure/IValidation.cs

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

TheSoftBedProject/SoftBedTests/DataModelsTests/CollectDataModelTests.cs

@@ -0,0 +1,85 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Enums;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+[TestFixture]
+internal class CollectDataModelTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var collect = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+        collect = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var collect = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var collect = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+        collect = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var collect = CreateDataModel(Guid.NewGuid().ToString(), "workerId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FurnitureIdIsNullOrEmptyTest()
+    {
+        var collect = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+        collect = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FurnitureIdIsNotGuidTest()
+    {
+        var collect = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "furnitureId", 10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var collect = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+        collect = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => collect.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var collectId = Guid.NewGuid().ToString();
+        var workerId = Guid.NewGuid().ToString();
+        var furnitureId = Guid.NewGuid().ToString();
+        var sum = 10;
+        var collect = CreateDataModel(collectId, workerId, furnitureId, sum);
+        Assert.That(() => collect.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(collect.Id, Is.EqualTo(collectId));
+            Assert.That(collect.WorkerId, Is.EqualTo(workerId));
+            Assert.That(collect.FurnitureId, Is.EqualTo(furnitureId));
+            Assert.That(collect.Sum, Is.EqualTo(sum));
+        });
+    }
+
+    public static CollectDataModel CreateDataModel(string? id, string? workerId, string? furnitureId, double sum) =>
+        new(id, workerId, furnitureId, sum);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/FurnitureDataModelTests.cs

@@ -0,0 +1,82 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Enums;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+
+[TestFixture]
+internal class FurnitureDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var furniture = CreateDataModel(null, "furnitureName", FurnitureType.CabinetFurniture, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(string.Empty, "furnitureName", FurnitureType.CabinetFurniture, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var furniture = CreateDataModel("id", "furnitureName", FurnitureType.CabinetFurniture, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void FurnitureNameIsEmptyTest()
+    {
+        var furniture = CreateDataModel(Guid.NewGuid().ToString(), null, FurnitureType.CabinetFurniture, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, FurnitureType.CabinetFurniture, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FurnitureTypeIsNoneTest()
+    {
+        var furniture = CreateDataModel(Guid.NewGuid().ToString(), "furnitureName", FurnitureType.None, 10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var furniture = CreateDataModel(Guid.NewGuid().ToString(), "furnitureName", FurnitureType.CabinetFurniture, 0, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(Guid.NewGuid().ToString(), "furnitureName", FurnitureType.CabinetFurniture, -10, false, CreateSubDataModel());
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkPiecesIsNullOrEmptyTest()
+    {
+        var furniture = CreateDataModel(Guid.NewGuid().ToString(), "furnitureName", FurnitureType.CabinetFurniture, 0, false, null);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(Guid.NewGuid().ToString(), "furnitureName", FurnitureType.CabinetFurniture, 0, false, []);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var furnitureId = Guid.NewGuid().ToString();
+        var furnitureName = "furnitureName";
+        var furnitureType = FurnitureType.CabinetFurniture;
+        var price = 10;
+        var isDeleted = false;
+        var workPieces = CreateSubDataModel();
+        var furniture = CreateDataModel(furnitureId, furnitureName, furnitureType, price, isDeleted, workPieces);
+        Assert.That(() => furniture.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(furniture.Id, Is.EqualTo(furnitureId));
+            Assert.That(furniture.FurnitureName, Is.EqualTo(furnitureName));
+            Assert.That(furniture.FurnitureType, Is.EqualTo(furnitureType));
+            Assert.That(furniture.Price, Is.EqualTo(price));
+            Assert.That(furniture.IsDeleted, Is.EqualTo(isDeleted));
+        });
+    }
+
+    public static FurnitureDataModel CreateDataModel(string? id, string? furnitureName, FurnitureType furnitureType, double price, bool isDeleted, List<FurnitureWorkPieceDataModel> workPieces) =>
+        new(id, furnitureName, furnitureType, price, isDeleted, workPieces);
+    private static List<FurnitureWorkPieceDataModel> CreateSubDataModel()
+    => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/FurnitureHistoryDataModelTests.cs

@@ -0,0 +1,52 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+
+[TestFixture]
+internal class FurnitureHistoryDataModelTests
+{
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var furniture = CreateDataModel(null, 10);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(string.Empty, 10);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var furniture = CreateDataModel("id", 10);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var furniture = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+        furniture = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => furniture.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var furnitureId = Guid.NewGuid().ToString();
+        var oldPrice = 10;
+        var furnitureHistory = CreateDataModel(furnitureId, oldPrice);
+        Assert.That(() => furnitureHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(furnitureHistory.FurnitureId, Is.EqualTo(furnitureId));
+            Assert.That(furnitureHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(furnitureHistory.ChangeDate, Is.LessThan(DateTime.UtcNow));
+            Assert.That(furnitureHistory.ChangeDate, Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+
+    private static FurnitureHistoryDataModel CreateDataModel(string? furnitureId, double oldPrice) =>
+        new(furnitureId, oldPrice);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/FurnitureWorkPieceDataModelTests.cs

@@ -0,0 +1,66 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+
+[TestFixture]
+internal class FurnitureWorkPieceDataModelTests
+{
+    [Test]
+    public void FurnitureIdIsNullOrEmptyTest()
+    {
+        var furnitureWorkPiece = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+        furnitureWorkPiece = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FurnitureIdIsNotGuidTest()
+    {
+        var furnitureWorkPiece = CreateDataModel("furnitureId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkPieceIdIsNullOrEmptyTest()
+    {
+        var furnitureWorkPiece = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+        furnitureWorkPiece = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkPieceIdIsNotGuidTest()
+    {
+        var furnitureWorkPiece = CreateDataModel(Guid.NewGuid().ToString(), "workPieceId", 10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var furnitureWorkPiece = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+        furnitureWorkPiece = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var furnitureId = Guid.NewGuid().ToString();
+        var workPieceId = Guid.NewGuid().ToString();
+        var count = 10;
+        var furnitureWorkPiece = CreateDataModel(furnitureId, workPieceId, count);
+        Assert.That(() => furnitureWorkPiece.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(furnitureWorkPiece.FurnitureId, Is.EqualTo(furnitureId));
+            Assert.That(furnitureWorkPiece.WorkPieceId, Is.EqualTo(workPieceId));
+            Assert.That(furnitureWorkPiece.Count, Is.EqualTo(count));
+        });
+    }
+    public static FurnitureWorkPieceDataModel CreateDataModel(string? furnitureId, string? workPieceId, int count) =>
+       new(furnitureId, workPieceId, count);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,74 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Enums;
+using SoftBedContracts.Exceptions;
+using System.Data;
+
+namespace SoftBedTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, "postName", PostType.Loader, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, "postName", PostType.Loader, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", "postName", PostType.Loader, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.Loader, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, PostType.Loader, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postName", PostType.None, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postName", PostType.Loader, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), "postName", PostType.Loader, -10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var postId = Guid.NewGuid().ToString();
+        var postName = Guid.NewGuid().ToString();
+        var postType = PostType.Loader;
+        var salary = 10;
+        var isActual = true;
+        var changeDate = DateTime.UtcNow.AddDays(-1);
+        var post = CreateDataModel(postId, postName, postType, salary, isActual, changeDate);
+        Assert.That(() => post.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(post.Id, Is.EqualTo(postId));
+            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? postName, PostType postType, double salary, bool isActual, DateTime changeDate) =>
+        new(id, postName, postType, salary, isActual, changeDate);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/SalaryDataModelTests.cs

@@ -0,0 +1,51 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+
+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);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/WorkPieceDataModelTests.cs

@@ -0,0 +1,75 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+[TestFixture]
+internal class WorkPieceDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var workPiece = CreateDataModel(null, "size", 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+        workPiece = CreateDataModel(string.Empty, "size", 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var workPiece = CreateDataModel("id", "size", 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SizeIsNullOrEmptyTest()
+    {
+        var workPiece = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+        workPiece = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SizeIsIncorrectTest()
+    {
+        var workPiece = CreateDataModel(Guid.NewGuid().ToString(), "1010", 10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var workPiece = CreateDataModel(Guid.NewGuid().ToString(), "size", 0);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+        workPiece = CreateDataModel(Guid.NewGuid().ToString(), "size", -10);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var workPiece = CreateDataModel(Guid.NewGuid().ToString(), "size", 0);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+        workPiece = CreateDataModel(Guid.NewGuid().ToString(), "size", 0);
+        Assert.That(() => workPiece.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workPieceId = Guid.NewGuid().ToString();
+        var size = "10x10";
+        var weight = 10;
+        var workPiece = CreateDataModel(workPieceId, size, weight);
+        Assert.That(() => workPiece.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(workPiece.Id, Is.EqualTo(workPieceId));
+            Assert.That(workPiece.Size, Is.EqualTo(size));
+            Assert.That(workPiece.Weight, Is.EqualTo(weight));
+        });
+    }
+
+    private static WorkPieceDataModel CreateDataModel(string? id, string? size, double weight) =>
+        new(id, size, weight);
+}

TheSoftBedProject/SoftBedTests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,88 @@
+using SoftBedContracts.DataModels;
+using SoftBedContracts.Exceptions;
+
+namespace SoftBedTests.DataModelsTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", DateTime.Now.AddYears(-18), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(1), DateTime.Now);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1));
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-16));
+        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 birthDate = DateTime.Now.AddYears(-18).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var worker = CreateDataModel(workerId, fio, postId, birthDate, employmentDate);
+        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.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
+        });
+    }
+
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, DateTime birthDate, DateTime employmentDate) =>
+        new(id, fio, postId, birthDate, employmentDate);
+}

TheSoftBedProject/SoftBedTests/SoftBedTests.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="..\SoftBedContracts\SoftBedContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

TheSoftBedProject/TheSoftBedProject.sln

@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.9.34728.123
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SoftBedContracts", "SoftBedContracts\SoftBedContracts.csproj", "{B0AF813F-CC99-4892-AA65-4CDB225B7AA3}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SoftBedContracts", "SoftBedContracts\SoftBedContracts.csproj", "{B0AF813F-CC99-4892-AA65-4CDB225B7AA3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SoftBedTests", "SoftBedTests\SoftBedTests.csproj", "{0E56A9DB-177A-4114-B437-DE0F6C9711F4}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{B0AF813F-CC99-4892-AA65-4CDB225B7AA3}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B0AF813F-CC99-4892-AA65-4CDB225B7AA3}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B0AF813F-CC99-4892-AA65-4CDB225B7AA3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0E56A9DB-177A-4114-B437-DE0F6C9711F4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0E56A9DB-177A-4114-B437-DE0F6C9711F4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0E56A9DB-177A-4114-B437-DE0F6C9711F4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0E56A9DB-177A-4114-B437-DE0F6C9711F4}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE