final lab1

Romashki/Romashki.sln

@@ -1,10 +1,12 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.12.35707.178 d17.12
+VisualStudioVersion = 17.12.35707.178
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RomashkiContract", "RomashkiContract\RomashkiContract.csproj", "{A35E02F7-07DD-428B-A6B5-8BD3DD05268F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RomashkiTests", "RomashkiTests\RomashkiTests.csproj", "{2D70C332-09B5-457D-95C9-30582CBA73E6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{A35E02F7-07DD-428B-A6B5-8BD3DD05268F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A35E02F7-07DD-428B-A6B5-8BD3DD05268F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A35E02F7-07DD-428B-A6B5-8BD3DD05268F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2D70C332-09B5-457D-95C9-30582CBA73E6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2D70C332-09B5-457D-95C9-30582CBA73E6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2D70C332-09B5-457D-95C9-30582CBA73E6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2D70C332-09B5-457D-95C9-30582CBA73E6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Romashki/RomashkiContract/DataModels/BuyerDataModel.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Xml;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiContracts.DataModels;
+
+public class BuyerDataModel(string id, string fio, string email, float totalSpend, double discountSize) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string FIO { get; private set; } = fio;
+    public string Email { get; private set; } = email;
+    public float TotalSpend { get; private set; } = totalSpend;
+    public double DiscountSize { get; private set; } = discountSize;
+    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 PhoneNumber is empty");
+        if (TotalSpend < 0)
+            throw new ValidationException("Field TotalSpend cannot be less than 0");
+        if (!Regex.IsMatch(Email, @"([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)"))
+            throw new ValidationException("Field Email is not an email");
+    }
+}
+

Romashki/RomashkiContract/DataModels/DiscountDataModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Exceptions;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+
+namespace RomashkiContract.DataModels;
+
+public class DiscountDataModel(string buyerId, DateTime discountDate, double discountSize) : IValidation
+{
+    public string BuyerId{ get; private set; } = buyerId;
+    public DateTime DiscountDate { get; private set; } = discountDate;
+    public double DiscountSize { get; private set; } = discountSize;
+    public void Validate()
+    {
+        if (BuyerId.IsEmpty())
+            throw new ValidationException("Field BuyerId is empty");
+        if (!BuyerId.IsGuid())
+            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+    if (discountSize < 0)
+            throw new ValidationException("Field DiscountSize is less than or equal to 0");
+    if (discountSize > 100)
+            throw new ValidationException("Field DiscountSize is more than 100");
+
+    }
+
+}

Romashki/RomashkiContract/DataModels/PostDataModel.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+using System.Xml;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiContracts.DataModels;
+
+public class PostDataModel(string id, string postId, string postName,
+    PostType postType, 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 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");
+    }
+}
+

Romashki/RomashkiContract/DataModels/ProductDataModel.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+using System.Xml;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiContracts.DataModels;
+
+public class ProductDataModel(string id, string productName, ProductType productType,
+    double price, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public string ProductName { get; private set; } = productName;
+    public ProductType ProductType { get; private set; } = productType;
+    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 (ProductName.IsEmpty())
+            throw new ValidationException("Field ProductName is empty");
+        if (ProductType == ProductType.None)
+            throw new ValidationException("Field ProductType is empty");
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}
+

Romashki/RomashkiContract/DataModels/ProductHistoryDataModel.cs

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

Romashki/RomashkiContract/DataModels/SaleDataModel.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+using System.Xml;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiContracts.DataModels;
+
+public class SaleDataModel(string id, string workerId, string? buyerId, double sum, DiscountType discountType,
+    double discount, bool isCancel, List<SaleProductDataModel> products) : 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 DiscountType DiscountType { get; private set; } = discountType;
+    public double Discount { get; private set; } = discount;
+    public bool IsCancel { get; private set; } = isCancel;
+    public List<SaleProductDataModel> Products { get; private set; } = products;
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field WorkerId is empty");
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+        if (!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 ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}

Romashki/RomashkiContract/DataModels/SaleProductDataModel.cs

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

Romashki/RomashkiContract/DataModels/WorkerDataModel.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Xml;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiContracts.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()})");
+    }
+}

Romashki/RomashkiContract/Enums/DiscountType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RomashkiContracts.Enums;
+
+[Flags]
+public enum DiscountType
+{
+    None = 0,
+    OnSale = 1,
+    RegularCustomer = 2,
+    Certificate = 4
+}

Romashki/RomashkiContract/Enums/PostType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RomashkiContracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Supervisor = 1,
+    Florist = 2,
+    Assistant = 3
+}

Romashki/RomashkiContract/Enums/ProductType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RomashkiContracts.Enums;
+
+public enum ProductType
+{
+    None = 0,
+    HomeFlower = 1,
+    Flower = 2,
+    Accessory = 3
+}
+

Romashki/RomashkiContract/Exceptions/ValidationException.cs

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

Romashki/RomashkiContract/Extensions/StringExtensions.cs

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

Romashki/RomashkiContract/Infrastructure/IValidation.cs

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

Romashki/RomashkiTests/BuyerDataModelTests.cs

@@ -0,0 +1,70 @@
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class BuyerDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(null, "fio", "email@123.qwe", 10, 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(string.Empty, "fio", "email@123.qwe", 10, 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var buyer = CreateDataModel("id", "fio", "email@123.qwe", 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void FIOIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), null, "email@123.qwe", 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "email@123.qwe", 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void EmailIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PhoneNumberIsIncorrectTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", "email", 10, 10);
+            Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var buyerId = Guid.NewGuid().ToString();
+            var fio = "Fio";
+            var email = "email@123.qwe";
+            var totalSpend = 10;
+            var discountSize = 11;
+            var buyer = CreateDataModel(buyerId, fio, email, totalSpend, discountSize);
+            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.Email, Is.EqualTo(email));
+                Assert.That(buyer.TotalSpend, Is.EqualTo(totalSpend));
+                Assert.That(buyer.DiscountSize, Is.EqualTo(discountSize));
+            });
+        }
+        private static BuyerDataModel CreateDataModel(string? id, string? fio, string? email,
+            float totalSpend, double discountSize) => new(id, fio, email, totalSpend, discountSize);
+    }
+
+}

Romashki/RomashkiTests/DiscountDataModelTests.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContract.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests;
+
+internal class DiscountDataModelTests
+{
+    [Test]
+    public void BuyerIdIsEmptyTest()
+    {
+        var discount = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+        discount = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void BuyerIdIsNotGuidTest()
+    {
+        var discount = CreateDataModel("buyerId", DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void DiscountIsLessOrMoreTest()
+    {
+        var discount = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -1);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+        discount = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, 101);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var discountDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var discountSize = 10;
+        var discount = CreateDataModel(buyerId, discountDate, discountSize);
+        Assert.That(() => discount.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(discount.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(discount.DiscountDate, Is.EqualTo(discountDate));
+            Assert.That(discount.DiscountSize, Is.EqualTo(discountSize));
+        });
+    }
+    private static DiscountDataModel CreateDataModel(string? buyerId, DateTime discountDate, double discountSize) => 
+        new(buyerId, discountDate, discountSize);
+
+}

Romashki/RomashkiTests/PostDataModelTests.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class PostDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name",
+            PostType.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => post.Validate(),
+            Throws.TypeOf<ValidationException>());
+            post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => post.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name",
+            PostType.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => post.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PostIdIsNullEmptyTest()
+        {
+            var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name",
+            PostType.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+            post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+            "name", PostType.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PostIdIsNotGuidTest()
+        {
+            var post = CreateDataModel(Guid.NewGuid().ToString(), "postId",
+            "name", PostType.Assistant , 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.Assistant, true, DateTime.UtcNow);
+            Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+            manufacturer = CreateDataModel(Guid.NewGuid().ToString(), 
+                Guid.NewGuid().ToString(), string.Empty, PostType.Assistant, 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, 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.Assistant;
+            var isActual = false;
+            var changeDate = DateTime.UtcNow.AddDays(-1);
+            var post = CreateDataModel(postId, postPostId, postName, postType, 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.IsActual, Is.EqualTo(isActual));
+                Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+            });
+        }
+        private static PostDataModel CreateDataModel(string? id, string? postId,
+        string? postName, PostType postType, bool isActual, DateTime
+        changeDate) => new(id, postId, postName, postType, isActual, changeDate);
+    }
+}

Romashki/RomashkiTests/ProductDataModelTests.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class ProductDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var product = CreateDataModel(null, "name", ProductType.Accessory, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+            product = CreateDataModel(string.Empty, "name", ProductType.Accessory, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var product = CreateDataModel("id", "name", ProductType.Accessory, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductNameIsEmptyTest()
+        {
+            var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Accessory, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+            product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Accessory, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductTypeIsNoneTest()
+        {
+            var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.None, 10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void PriceIsLessOrZeroTest()
+        {
+            var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Accessory, 0, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+            product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Accessory, -10, false);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var productId = Guid.NewGuid().ToString();
+            var productName = "name";
+            var productType = ProductType.Accessory;
+            var productPrice = 10;
+            var productIsDelete = false;
+            var product = CreateDataModel(productId, productName, productType, productPrice, productIsDelete);
+            Assert.That(() => product.Validate(), Throws.Nothing);
+            Assert.Multiple(() =>
+            {
+                Assert.That(product.Id, Is.EqualTo(productId));
+                Assert.That(product.ProductName, Is.EqualTo(productName));
+                Assert.That(product.ProductType, Is.EqualTo(productType));
+                Assert.That(product.Price, Is.EqualTo(productPrice));
+                Assert.That(product.IsDeleted, Is.EqualTo(productIsDelete));
+            });
+        }
+        private static ProductDataModel CreateDataModel(string? id, string? productName,
+            ProductType productType, double price, bool
+        isDeleted) => new(id, productName, productType, price, isDeleted);
+    }
+
+}

Romashki/RomashkiTests/ProductHistoryDataModelTests.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class ProductHistoryDataModelTests
+    {
+        [Test]
+        public void ProductIdIsNullOrEmptyTest()
+        {
+            var product = CreateDataModel(null, 10);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+            product = CreateDataModel(string.Empty, 10);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductIdIsNotGuidTest()
+        {
+            var product = CreateDataModel("id", 10);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void OldPriceIsLessOrZeroTest()
+        {
+            var product = CreateDataModel(Guid.NewGuid().ToString(), 0);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+            product = CreateDataModel(Guid.NewGuid().ToString(), -10);
+            Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var productId = Guid.NewGuid().ToString();
+            var oldPrice = 10;
+            var productHistory = CreateDataModel(productId, oldPrice);
+            Assert.That(() => productHistory.Validate(), Throws.Nothing);
+            Assert.Multiple(() =>
+            {
+                Assert.That(productHistory.ProductId, Is.EqualTo(productId));
+                Assert.That(productHistory.OldPrice, Is.EqualTo(oldPrice));
+                Assert.That(productHistory.ChangeDate,
+                Is.LessThan(DateTime.UtcNow));
+                Assert.That(productHistory.ChangeDate,
+                Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+            });
+        }
+        private static ProductHistoryDataModel CreateDataModel(string? productId, double oldPrice) => new(productId, oldPrice);
+    }
+
+}

Romashki/RomashkiTests/RomashkiTests.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="..\RomashkiContract\RomashkiContract.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

Romashki/RomashkiTests/SaleDataModelTests.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Enums;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class SaleDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var sale = CreateDataModel(null, Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+            sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var sale = CreateDataModel("id", Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void WorkerIdIsNullOrEmptyTest()
+        {
+            var sale = CreateDataModel(Guid.NewGuid().ToString(), null,
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(),
+            Throws.TypeOf<ValidationException>());
+            sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void WorkerIdIsNotGuidTest()
+        {
+            var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId",
+            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void BuyerIdIsNotGuidTest()
+        {
+            var sale = CreateDataModel(Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), "buyerId", 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void SumIsLessOrZeroTest()
+        {
+            var sale = CreateDataModel(Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+            sale = CreateDataModel(Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductsIsNullOrEmptyTest()
+        {
+            var sale = CreateDataModel(Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, null);
+            Assert.That(() => sale.Validate(),
+            Throws.TypeOf<ValidationException>());
+            sale = CreateDataModel(Guid.NewGuid().ToString(), 
+            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, []);
+            
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var saleId = Guid.NewGuid().ToString();
+            var workerId = Guid.NewGuid().ToString();
+            var buyerId = Guid.NewGuid().ToString();
+            var sum = 10;
+            var discountType = DiscountType.Certificate;
+            var discount = 1;
+            var isCancel = true;
+            var products = CreateSubDataModel();
+            var sale = CreateDataModel(saleId, workerId, buyerId, sum, discountType, discount, isCancel, products);
+            Assert.That(() => sale.Validate(), Throws.Nothing);
+            Assert.Multiple(() =>
+            {
+                Assert.That(sale.Id, Is.EqualTo(saleId));
+                Assert.That(sale.WorkerId, Is.EqualTo(workerId));
+                Assert.That(sale.BuyerId, Is.EqualTo(buyerId));
+                Assert.That(sale.Sum, Is.EqualTo(sum));
+                Assert.That(sale.DiscountType, Is.EqualTo(discountType));
+                Assert.That(sale.Discount, Is.EqualTo(discount));
+                Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
+                Assert.That(sale.Products, Is.EquivalentTo(products));
+            });
+        }
+        private static SaleDataModel CreateDataModel(string? id, string? workerId,string? buyerId, double sum,
+            DiscountType discountType, double discount, bool isCancel, List<SaleProductDataModel>? products) => 
+            new(id, workerId, buyerId, sum, discountType, discount, isCancel, products);
+        private static List<SaleProductDataModel> CreateSubDataModel() => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+    }
+
+}

Romashki/RomashkiTests/SaleProductDataModelTests.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [TestFixture]
+    internal class SaleProductDataModelTests
+    {
+        [Test]
+        public void SaleIdIsNullOrEmptyTest()
+        {
+            var saleProduct = CreateDataModel(null, Guid.NewGuid().ToString(),
+            10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+            saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void SaleIdIsNotGuidTest()
+        {
+            var saleProduct = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductIdIsNullOrEmptyTest()
+        {
+            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+            saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void ProductIdIsNotGuidTest()
+        {
+            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), "productId", 10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void CountIsLessOrZeroTest()
+        {
+            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), 0);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+            
+        saleProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var saleId = Guid.NewGuid().ToString();
+            var productId = Guid.NewGuid().ToString();
+            var count = 10;
+            var saleProduct = CreateDataModel(saleId, productId, count);
+            Assert.That(() => saleProduct.Validate(), Throws.Nothing);
+            Assert.Multiple(() =>
+            {
+                Assert.That(saleProduct.SaleId, Is.EqualTo(saleId));
+                Assert.That(saleProduct.ProductId, Is.EqualTo(productId));
+                Assert.That(saleProduct.Count, Is.EqualTo(count));
+            });
+        }
+        private static SaleProductDataModel CreateDataModel(string? saleId, string? productId, int count) => new(saleId, productId, count);
+    }
+
+}

Romashki/RomashkiTests/WorkerDataModelTests.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests
+{
+    [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);
+    }
+}