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AndDietCokeProject/AndDietCokeContracts/DataModels/BuyerDataModel.cs

@@ -0,0 +1,34 @@
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Xml;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class BuyerDataModel(string id, string fio, string phoneNumber) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string FIO { get; private set; } = fio;
+    public string PhoneNumber { get; private set; } = phoneNumber;
+    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 (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+        if (!Regex.IsMatch(PhoneNumber, @"^(((8|\+7)[\-\s]?)?(\(?\d{3}\)?[\-\s]?)?[\d\-\s]{7,10}|(\d{2}[\-\s]?\d{2}[\-\s]?\d{2}))$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/DishDataModel.cs

@@ -0,0 +1,35 @@
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class DishDataModel(string id, string dishName, DishType dishType, double price, IngredientType ingredientType, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string DishName { get; private set; } = dishName;
+    public DishType DishType { get; private set; } = dishType;
+    public double Price { get; private set; } = price;
+    public IngredientType IngredientType { get; private set; } = ingredientType;
+    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 (DishName.IsEmpty())
+            throw new ValidationException("Field DishName is empty");
+        if (DishType == DishType.None)
+            throw new ValidationException("Field DishType is empty");
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/DishHistoryDataModel.cs

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

AndDietCokeProject/AndDietCokeContracts/DataModels/OrderDataModel.cs

@@ -0,0 +1,40 @@
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class OrderDataModel(string id, string workerId, string? buyerId, double sum, bool isCancel, List<OrderDishDataModel> dishes) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string WorkerId { get; private set; } = workerId;
+    public string? BuyerId { get; private set; } = buyerId;
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+    public double Sum { get; private set; } = sum;
+    public bool IsCancel { get; private set; } = isCancel;
+    public List<OrderDishDataModel> Dishes { get; private set; } = dishes;
+    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 (!BuyerId?.IsGuid() ?? !BuyerId?.IsEmpty() ?? false)
+            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+        if (Sum <= 0)
+            throw new ValidationException("Field Sum is less than or equal to 0");
+        if ((Dishes?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include dishes");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/OrderDishDataModel.cs

@@ -0,0 +1,31 @@
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class OrderDishDataModel(string orderId, string dishId, int count) :
+IValidation
+{
+    public string OrderId { get; private set; } = orderId;
+    public string DishId { get; private set; } = dishId;
+    public int Count { get; private set; } = count;
+    public void Validate()
+    {
+        if (OrderId.IsEmpty())
+            throw new ValidationException("Field OrderId is empty");
+        if (!OrderId.IsGuid())
+            throw new ValidationException("The value in the field OrderId is not a unique identifier");
+        if (DishId.IsEmpty())
+            throw new ValidationException("Field DishId is empty");
+        if (!DishId.IsGuid())
+            throw new ValidationException("The value in the field DishId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,41 @@
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class PostDataModel(string id, string postId, string postName, PostType postType, double salary, 
+    bool isActual, DateTime changeDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string PostId { get; private set; } = postId;
+    public string PostName { get; private set; } = postName;
+    public PostType PostType { get; private set; } = postType;
+    public double Salary { get; private set; } = salary;
+    public bool IsActual { get; private set; } = isActual;
+    public DateTime ChangeDate { get; private set; } = changeDate;
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field PostId is empty");
+        if (!PostId.IsGuid())
+            throw new ValidationException("The value in the field PostId is not a unique identifier");
+        if (PostName.IsEmpty())
+            throw new ValidationException("Field PostName is empty");
+        if (PostType == PostType.None)
+            throw new ValidationException("Field PostType is empty");
+        if (Salary <= 0)
+            throw new ValidationException("Field Salary is empty");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/SalaryDataModel.cs

@@ -0,0 +1,27 @@
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class SalaryDataModel(string workerId, DateTime salaryDate, double
+workerSalary) : IValidation
+{
+    public string WorkerId { get; private set; } = workerId;
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+    public double Salary { get; private set; } = workerSalary;
+    public void Validate()
+    {
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field WorkerId is empty");
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+    if (Salary <= 0)
+            throw new ValidationException("Field Salary is less than or equal to 0");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,42 @@
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Xml;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeContracts.DataModels;
+
+public class WorkerDataModel(string id, string fio, 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 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 (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()})");
+    }
+}

AndDietCokeProject/AndDietCokeContracts/Enums/DishType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Enums;
+
+public enum DishType
+{
+    None = 0,
+    Pizza = 1,
+    Pasta = 2,
+    Beverage = 3
+}

AndDietCokeProject/AndDietCokeContracts/Enums/IngredientType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Enums;
+
+[Flags]
+public enum IngredientType
+{
+    None = 0,
+    Dough = 1,
+    Cheese = 2,
+    Tomato = 4
+}

AndDietCokeProject/AndDietCokeContracts/Enums/PostType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Cashier = 1,
+    Cook = 2,
+    Packager = 3
+}

AndDietCokeProject/AndDietCokeContracts/Exceptions/ValidationException.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Exceptions;
+
+public class ValidationException(string message) : Exception(message)
+{
+}

AndDietCokeProject/AndDietCokeContracts/Extensions/StringExtensions.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.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 _);
+    }
+}

AndDietCokeProject/AndDietCokeContracts/Infrastructure/IValidation.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.Infrastructure;
+
+internal interface IValidation
+{
+    void Validate();
+}

AndDietCokeProject/AndDietCokeProject.sln

@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.10.35122.118
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeContracts", "AndDietCokeContracts\AndDietCokeContracts.csproj", "{A256099F-4B07-44ED-B748-4369BD259FC6}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AndDietCokeContracts", "AndDietCokeContracts\AndDietCokeContracts.csproj", "{A256099F-4B07-44ED-B748-4369BD259FC6}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeTests", "AndDietCokeTests\AndDietCokeTests.csproj", "{A21ACBA8-D297-49F8-89BF-7FA04B73D23F}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{A256099F-4B07-44ED-B748-4369BD259FC6}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A256099F-4B07-44ED-B748-4369BD259FC6}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A256099F-4B07-44ED-B748-4369BD259FC6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A21ACBA8-D297-49F8-89BF-7FA04B73D23F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A21ACBA8-D297-49F8-89BF-7FA04B73D23F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A21ACBA8-D297-49F8-89BF-7FA04B73D23F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A21ACBA8-D297-49F8-89BF-7FA04B73D23F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

AndDietCokeProject/AndDietCokeTests/AndDietCokeTests.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="..\AndDietCokeContracts\AndDietCokeContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

AndDietCokeProject/AndDietCokeTests/DataModelsTests/BuyerDataModelTests.cs

@@ -0,0 +1,72 @@
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class BuyerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(null, "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(string.Empty, "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var buyer = CreateDataModel("id", "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), null, "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", null);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsIncorrectTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", "777");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var fio = "Fio";
+        var phoneNumber = "62-10-10";
+        var buyer = CreateDataModel(buyerId, fio, phoneNumber);
+        Assert.That(() => buyer.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(buyer.Id, Is.EqualTo(buyerId));
+            Assert.That(buyer.FIO, Is.EqualTo(fio));
+            Assert.That(buyer.PhoneNumber, Is.EqualTo(phoneNumber));
+        });
+    }
+    private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber) =>
+        new(id, fio, phoneNumber);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/DishDataModelTests.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class DishDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var dish = CreateDataModel(null, "name", DishType.Pizza, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+        dish = CreateDataModel(string.Empty, "name", DishType.Pizza, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var dish = CreateDataModel("id", "name", DishType.Pizza, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DishNameIsEmptyTest()
+    {
+        var dish = CreateDataModel(Guid.NewGuid().ToString(), null, DishType.Pizza, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+        dish = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, DishType.Pizza, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DishTypeIsNoneTest()
+    {
+        var dish = CreateDataModel(Guid.NewGuid().ToString(), null, DishType.None, 10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var dish = CreateDataModel(Guid.NewGuid().ToString(), "name", DishType.Pizza, 0, IngredientType.Dough , false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+        dish = CreateDataModel(Guid.NewGuid().ToString(), "name", DishType.Pizza, -10, IngredientType.Dough, false);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var dishId = Guid.NewGuid().ToString();
+        var dishName = "name";
+        var dishType = DishType.Pizza;
+        var dishPrice = 10;
+        var dishIngredientType = IngredientType.Dough;
+        var dishIsDelete = false;
+        var dish = CreateDataModel(dishId, dishName, dishType, dishPrice, dishIngredientType, dishIsDelete);
+        Assert.That(() => dish.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(dish.Id, Is.EqualTo(dishId));
+            Assert.That(dish.DishName, Is.EqualTo(dishName));
+            Assert.That(dish.DishType, Is.EqualTo(dishType));
+            Assert.That(dish.Price, Is.EqualTo(dishPrice));
+            Assert.That(dish.IngredientType, Is.EqualTo(dishIngredientType));
+            Assert.That(dish.IsDeleted, Is.EqualTo(dishIsDelete));
+        });
+    }
+    private static DishDataModel CreateDataModel(string? id, string? dishName, DishType dishType, double price, IngredientType ingredientType, bool isDeleted) =>
+        new(id, dishName, dishType, price, ingredientType, isDeleted);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/DishHistoryDataModelTests.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class DishHistoryDataModelTests
+{
+    [Test]
+    public void DishIdIsNullOrEmptyTest()
+    {
+        var dish = CreateDataModel(null, 10);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+        dish = CreateDataModel(string.Empty, 10);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DishIdIsNotGuidTest()
+    {
+        var dish = CreateDataModel("id", 10);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var dish = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+        dish = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => dish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var dishId = Guid.NewGuid().ToString();
+        var oldPrice = 10;
+        var dishHistory = CreateDataModel(dishId, oldPrice);
+        Assert.That(() => dishHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(dishHistory.DishId, Is.EqualTo(dishId));
+            Assert.That(dishHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(dishHistory.ChangeDate, Is.LessThan(DateTime.UtcNow));
+            Assert.That(dishHistory.ChangeDate, Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+    private static DishHistoryDataModel CreateDataModel(string? dishId, double oldPrice) =>
+        new(dishId, oldPrice);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/OrderDataModelTests.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class OrderDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var order = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+        order = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var order = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var order = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+        order = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var order = CreateDataModel(Guid.NewGuid().ToString(), "workerId", Guid.NewGuid().ToString(), 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BuyerIdIsNotGuidTest()
+    {
+        var order = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "buyerId", 10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var order = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+        order = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, false, CreateSubDataModel());
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var order = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, null);
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+        order = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []);
+        Assert.That(() => order.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var orderId = Guid.NewGuid().ToString();
+        var workerId = Guid.NewGuid().ToString();
+        var buyerId = Guid.NewGuid().ToString();
+        var sum = 10;
+        var isCancel = true;
+        var dishes = CreateSubDataModel();
+        var sale = CreateDataModel(orderId, workerId, buyerId, sum, isCancel, dishes);
+        Assert.That(() => sale.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(sale.Id, Is.EqualTo(orderId));
+            Assert.That(sale.WorkerId, Is.EqualTo(workerId));
+            Assert.That(sale.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(sale.Sum, Is.EqualTo(sum));
+            Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
+            Assert.That(sale.Dishes, Is.EquivalentTo(dishes));
+        });
+    }
+    private static OrderDataModel CreateDataModel(string? id, string? workerId, string? buyerId, double sum, bool isCancel, List<OrderDishDataModel>? dishes) =>
+        new(id, workerId, buyerId, sum, isCancel, dishes);
+    private static List<OrderDishDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/OrderDishDataModelTests.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class OrderDishDataModelTests
+{
+    [Test]
+    public void OrderIdIsNullOrEmptyTest()
+    {
+        var orderDish = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OrderIdIsNotGuidTest()
+    {
+        var orderDish = CreateDataModel("orderId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DishIdIsNullOrEmptyTest()
+    {
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+        orderDish = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DishIdIsNotGuidTest()
+    {
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), "dishId", 10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+        orderDish = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => orderDish.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var orderId = Guid.NewGuid().ToString();
+        var dishId = Guid.NewGuid().ToString();
+        var count = 10;
+        var orderDish = CreateDataModel(orderId, dishId, count);
+        Assert.That(() => orderDish.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(orderDish.OrderId, Is.EqualTo(orderId));
+            Assert.That(orderDish.DishId, Is.EqualTo(dishId));
+            Assert.That(orderDish.Count, Is.EqualTo(count));
+        });
+    }
+    private static OrderDishDataModel CreateDataModel(string? orderId, string? dishId, int count) =>
+        new(orderId, dishId, count);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Cook, 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.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Cook, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Cook, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Cook, -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.Cook;
+        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);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/SalaryDataModelTests.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+internal class SalaryDataModelTests
+{
+    [Test]
+    public void WorkerIdIsEmptyTest()
+    {
+        var salary = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var salary = CreateDataModel("workerId", DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, 0);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var salaryDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var workerSalary = 10;
+        var salary = CreateDataModel(workerId, salaryDate, workerSalary);
+        Assert.That(() => salary.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(salary.WorkerId, Is.EqualTo(workerId));
+            Assert.That(salary.SalaryDate, Is.EqualTo(salaryDate));
+            Assert.That(salary.Salary, Is.EqualTo(workerSalary));
+        });
+    }
+    private static SalaryDataModel CreateDataModel(string? workerId, DateTime salaryDate, double workerSalary) =>
+        new(workerId, salaryDate, workerSalary);
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+
+namespace AndDietCokeTests.DataModelsTests;
+
+[TestFixture]
+
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), 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 birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, birthDate, employmentDate, isDelete);
+        Assert.That(() => worker.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(worker.Id, Is.EqualTo(workerId));
+            Assert.That(worker.FIO, Is.EqualTo(fio));
+            Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
+            Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
+        });
+    }
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, postId, birthDate, employmentDate, isDeleted);
+}