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PuferFishContracts/PuferFishContracts.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}") = "PuferFishContracts", "PuferFishContracts\PuferFishContracts.csproj", "{4D964053-55A4-4522-BF52-984A22880D24}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PuferFishTests", "PuferFishTests\PuferFishTests.csproj", "{6A249C1E-4321-4506-841B-2BCE80F550A5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{4D964053-55A4-4522-BF52-984A22880D24}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4D964053-55A4-4522-BF52-984A22880D24}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4D964053-55A4-4522-BF52-984A22880D24}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6A249C1E-4321-4506-841B-2BCE80F550A5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

PuferFishContracts/PuferFishContracts/DataModels/BuyerDataModel.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels
+{
+    public class BuyerDataModel(string id, string fio, string phoneNumber, double points) : IValidation
+    {
+        public string Id { get; private set; } = id;
+        public string FIO { get; private set; } = fio;
+        public string PhoneNumber { get; private set; } = phoneNumber;
+        public double Points { get; private set; } = points;
+
+        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 (!Regex.IsMatch(FIO, @"\b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b"))
+                throw new ValidationException("Field FIO is not a FIO");
+
+            if (PhoneNumber.IsEmpty())
+                throw new ValidationException("Field PhoneNumber is empty");
+
+            if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+                throw new ValidationException("Field PhoneNumber is not a phone number");
+            if (Points < 0)
+                throw new ValidationException("The value in the field Points is a negative number");
+        }
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/PointsDataModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishContracts.DataModels;
+
+public class PointsDataModel(string buyerId, DateTime pointsDate, double buyerPoints) : IValidation
+{
+    public string BuyerId { get; private set; } = buyerId;
+    public DateTime PointsDate { get; private set; } = pointsDate;
+    public double Points { get; private set; } = buyerPoints;
+    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 (Points <= 0)
+            throw new ValidationException("Field Points is less than or equal to 0");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/PostDataModel.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+using System.Xml;
+
+namespace PuferFishContracts.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");
+        }
+
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ProductDataModel.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class ProductDataModel(string id, string productName, ProductType productType, double price, List<SupplyProductDataModel> supplies, List<ShopProductDataModel> shop, 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 List<SupplyProductDataModel> Supplies { get; private set; } = supplies;
+    public List<ShopProductDataModel> Shop { get; private set; } = shop;
+    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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ProductHistoryDataModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SaleDataModel.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using System.Xml;
+
+namespace PuferFishContracts.DataModels;
+
+public class SaleDataModel(string id, string workerId, string? buyerId, double sum, double points, 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 double Points { get; private set; } = points;
+    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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SaleProductDataModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ShopDataModel.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Enums;
+
+namespace PuferFishContracts.DataModels;
+
+public class ShopDataModel(string id, ProductType productType, int count, List<ShopProductDataModel> products) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public ProductType ProductType { get; private set; } = productType;
+
+    public int Count { get; private set; } = count;
+
+    public List<ShopProductDataModel> 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 (ProductType == ProductType.None)
+            throw new ValidationException("Field ProductType is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The warehouse must include products");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/ShopProductDataModel.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class ShopProductDataModel(string shopId, string productId, int count) : IValidation
+{
+    public string ShopId { get; private set; } = shopId;
+
+    public string ProductId { get; private set; } = productId;
+
+    public int Count { get; private set; } = count;
+    public void Validate()
+    {
+        if (ShopId.IsEmpty())
+            throw new ValidationException("Field WarehouseId is empty");
+
+        if (!ShopId.IsGuid())
+            throw new ValidationException("The value in the field WarehouseId is not a unique identifier");
+
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field TourId 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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SupplyDataModel.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishContracts.DataModels;
+
+public class SupplyDataModel(string id, ProductType productType, DateTime deliveryDate, int count, List<SupplyProductDataModel> products) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public ProductType ProductType { get; private set; } = productType;
+
+    public DateTime DeliveryDate { get; private set; } = deliveryDate;
+
+    public int Count { get; private set; } = count;
+
+    public List<SupplyProductDataModel> 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 (ProductType == ProductType.None)
+            throw new ValidationException("Field ProductType is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Products?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include products");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/SupplyProductDataModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.Infrastructure;
+
+namespace PuferFishContracts.DataModels;
+
+public class SupplyProductDataModel(string supplyId, string productId, int count) : IValidation
+{
+    public string SupplyId { get; private set; } = supplyId;
+    public string ProductId { get; private set; } = productId;
+    public int Count { get; private set; } = count;
+    public void Validate()
+    {
+        if (SupplyId.IsEmpty())
+            throw new ValidationException("Field SupplyId is empty");
+        if (!SupplyId.IsGuid())
+            throw new ValidationException("The value in the field SupplyId 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");
+    }
+}

PuferFishContracts/PuferFishContracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+using System.Xml;
+using PuferFishContracts.Infrastructure;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+using System.Text.RegularExpressions;
+
+namespace PuferFishContracts.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 (!Regex.IsMatch(FIO, @"\b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b \b[А-ЯЁ][а-яё]*\b"))
+            throw new ValidationException("Field FIO is not a FIO");
+
+        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($"Minors cannot be hired (BirthDate = { BirthDate.ToShortDateString() })");
+
+        if (EmploymentDate.Date < BirthDate.Date)
+            throw new ValidationException("The date of employment cannot be less than the date of birth");
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) //EmploymentDate.Year - BirthDate.Year
+            throw new ValidationException($"Minors cannot be hired (EmploymentDate - { EmploymentDate.ToShortDateString() }, BirthDate - { BirthDate.ToShortDateString()})");
+    }
+}

PuferFishContracts/PuferFishContracts/Enums/PostType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Enums
+{
+    public enum PostType
+    {
+        None = 0,
+        Cashier = 1,
+        chef = 2,
+        Packer = 3
+    }
+}

PuferFishContracts/PuferFishContracts/Enums/ProductType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Enums
+{
+    public enum ProductType
+    {
+        None = 0,
+        Sushi = 1,
+        Rolls = 2,
+        Onigiri = 3
+    }
+}

PuferFishContracts/PuferFishContracts/Exceptions/ValidationException.cs

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

PuferFishContracts/PuferFishContracts/Extensions/StringExtensions.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.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 var _);
+        }
+    }
+}

PuferFishContracts/PuferFishContracts/Infrastructure/IValidation.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PuferFishContracts.Infrastructure
+{
+    public interface IValidation
+    {
+        void Validate();
+    }
+}

PuferFishContracts/PuferFishTests/DataModelsTests/BuyerDataModelTests.cs

@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests
+{
+    [TestFixture]
+    internal class BuyerDataModelTests
+    {
+        [Test]
+        public void IdIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(null, "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(string.Empty, "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void IdIsNotGuidTest()
+        {
+            var buyer = CreateDataModel("id", "Фамилия Имя Отчество", "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void FIOIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), null,
+            "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+            "number", 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PhoneNumberIsNullOrEmptyTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество", null,
+            10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+            buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+            string.Empty, 10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void PhoneNumberIsIncorrectTest()
+        {
+            var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество", "777",
+            10);
+            Assert.That(() => buyer.Validate(),
+            Throws.TypeOf<ValidationException>());
+        }
+        [Test]
+        public void AllFieldsIsCorrectTest()
+        {
+            var buyerId = Guid.NewGuid().ToString();
+            var fio = "Фамилия Имя Отчество";
+            var phoneNumber = "+7-777-777-77-77";
+            var points = 11;
+            var buyer = CreateDataModel(buyerId, fio, phoneNumber, points);
+            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));
+                Assert.That(buyer.Points, Is.EqualTo(points));
+            });
+        }
+        private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber, double points) => new(id, fio, phoneNumber, points);
+    }
+}

PuferFishContracts/PuferFishTests/DataModelsTests/PointsDataModelTests.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class PointsDataModelTests
+{
+    [Test]
+    public void WorkerIdIsEmptyTest()
+    {
+        var points = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+        points = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var points = CreateDataModel("workerId", DateTime.Now, 10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var points = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now,
+        0);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+        points = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -
+        10);
+        Assert.That(() => points.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var pointsDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var buyerPoints = 10;
+        var points = CreateDataModel(buyerId, pointsDate, buyerPoints);
+        Assert.That(() => points.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(points.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(points.PointsDate, Is.EqualTo(pointsDate));
+            Assert.That(points.Points, Is.EqualTo(buyerPoints));
+        });
+    }
+    private static PointsDataModel CreateDataModel(string? buyerId, DateTime
+    pointsDate, double buyerPoints) => new(buyerId, pointsDate, buyerPoints);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+using PuferFishContracts.DataModels;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name",
+        PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(),
+        "name", PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name",
+        PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name",
+        PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        "name", PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId",
+        "name", PostType.Cashier, 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.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(),
+        Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), string.Empty, PostType.Cashier, 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 SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), "name", PostType.Cashier, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(),
+        Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Cashier, 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.Cashier;
+        var salary = 10;
+        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.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, bool isActual, DateTime changeDate) => new (id, postId, postName, postType, isActual, changeDate);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ProductDataModelTests.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Infrastructure;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+internal class ProductDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Rolls, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name", ProductType.Rolls, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Rolls, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Rolls, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Rolls, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.None, 500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Rolls, 0, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Rolls, -500, CreateSuppliesDataModel(), CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void SuppliesIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Rolls, 0, null, CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Rolls, 0, [], CreateWarehouseDataModel(), false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WarehouseIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Rolls, 0, CreateSuppliesDataModel(), null, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Rolls, 0, CreateSuppliesDataModel(), [], false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Rolls;
+        var productRestaurantId = Guid.NewGuid().ToString();
+        var productPrice = 500;
+        var supplies = CreateSuppliesDataModel();
+        var warehouse = CreateWarehouseDataModel();
+        var productIsDeleted = false;
+        var product = CreateDataModel(productId, productName, productType, productPrice, supplies, warehouse, productIsDeleted);
+        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.Supplies, Is.EqualTo(supplies));
+            Assert.That(product.Shop, Is.EqualTo(warehouse));
+            Assert.That(product.IsDeleted, Is.EqualTo(productIsDeleted));
+        });
+    }
+
+    private static ProductDataModel CreateDataModel(string? id, string? productName, ProductType productType, double price, List<SupplyProductDataModel>? supplies, List<ShopProductDataModel>? shop, bool isDeleted) =>
+       new(id, productName, productType, price, supplies, shop, isDeleted);
+    private static List<SupplyProductDataModel> CreateSuppliesDataModel()
+       => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+
+    private static List<ShopProductDataModel> CreateWarehouseDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ProductHistoryDataModelTests.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[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);
+
+}

PuferFishContracts/PuferFishTests/DataModelsTests/SaleDataModelTests.cs

@@ -0,0 +1,125 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class SaleDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 10, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), 10, 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, 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, 10, false,
+        CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
+        Guid.NewGuid().ToString(), 10, 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, 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, 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, 10,
+        false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10,
+        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,
+        10, false, null);
+        Assert.That(() => sale.Validate(),
+        Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(),
+        Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10,
+        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 points = 1;
+        var isCancel = true;
+        var products = CreateSubDataModel();
+        var sale = CreateDataModel(saleId, workerId, buyerId, sum, points, 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.Points, Is.EqualTo(points));
+            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, double points, bool
+    isCancel, List<SaleProductDataModel>? products) => new(id, workerId, buyerId, sum, points, isCancel, products);
+    private static List<SaleProductDataModel> CreateSubDataModel()
+    => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

PuferFishContracts/PuferFishTests/DataModelsTests/SaleProductDataModelTests.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[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);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ShopDataModelTests.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class ShopDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var shop = CreateDataModel(null, ProductType.Rolls, 1, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+        shop = CreateDataModel(string.Empty, ProductType.Rolls, 1, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var shop = CreateDataModel("id", ProductType.Rolls, 1, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var shop = CreateDataModel(Guid.NewGuid().ToString(), ProductType.None, 1, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var shop = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, 0, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+
+        shop = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, -1, CreateSubDataModel());
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var shop = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, 1, null);
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+
+        shop = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, 1, []);
+        Assert.That(() => shop.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var productType = ProductType.Rolls;
+        var count = 1;
+        var products = CreateSubDataModel();
+        var model = CreateDataModel(id, productType, count, products);
+        Assert.DoesNotThrow(() => model.Validate());
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.Id, Is.EqualTo(id));
+            Assert.That(model.ProductType, Is.EqualTo(productType));
+            Assert.That(model.Count, Is.EqualTo(count));
+            Assert.That(model.Products, Is.EqualTo(products));
+        });
+    }
+
+    private static ShopDataModel CreateDataModel(string? id, ProductType productType, int count, List<ShopProductDataModel>? products)
+        => new ShopDataModel(id, productType, count, products);
+
+    private static List<ShopProductDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

PuferFishContracts/PuferFishTests/DataModelsTests/ShopProductDataModelTests.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class ShopProductDataModelTests
+{
+    [Test]
+    public void ShopIdIsNullOrEmptyTest()
+    {
+        var shopProduct = CreateDataModel(null, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+
+        shopProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ShopIdIsNotGuidTest()
+    {
+        var shopProduct = CreateDataModel("shopId", Guid.NewGuid().ToString(), 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var shopProduct = CreateDataModel(Guid.NewGuid().ToString(), null, 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+
+        shopProduct = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var shopProduct = CreateDataModel(Guid.NewGuid().ToString(), "productId", 1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var shopProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+        shopProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -1);
+        Assert.That(() => shopProduct.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var shopId = Guid.NewGuid().ToString();
+        var productId = Guid.NewGuid().ToString();
+        var count = 1;
+        var shopProduct = CreateDataModel(shopId, productId, count);
+        Assert.That(() => shopProduct.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(shopProduct.ShopId, Is.EqualTo(shopId));
+            Assert.That(shopProduct.ProductId, Is.EqualTo(productId));
+            Assert.That(shopProduct.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static ShopProductDataModel CreateDataModel(string? shopId, string? productId, int count) => new(shopId, productId, count);
+}
+

PuferFishContracts/PuferFishTests/DataModelsTests/SupplyDataModelTests.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Enums;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class SupplyDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var suppliesData = CreateDataModel(null, ProductType.Rolls, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+        suppliesData = CreateDataModel(string.Empty, ProductType.Rolls, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var suppliesData = CreateDataModel("id", ProductType.Rolls, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductTypeIsNoneTest()
+    {
+        var suppliesData = CreateDataModel(Guid.NewGuid().ToString(), ProductType.None, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var suppliesData = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, DateTime.Now, 0, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+
+        suppliesData = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, DateTime.Now, -1, CreateSubDataModel());
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ProductsIsNullOrEmptyTest()
+    {
+        var suppliesData = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, DateTime.Now, 1, null);
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+        suppliesData = CreateDataModel(Guid.NewGuid().ToString(), ProductType.Rolls, DateTime.Now, 1, []);
+        Assert.That(() => suppliesData.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var productType = ProductType.Rolls;
+        var deliveryDate = DateTime.Now;
+        var count = 1;
+        var products = CreateSubDataModel();
+        var suppliesData = CreateDataModel(id, productType, deliveryDate, count, products);
+        Assert.That(() => suppliesData.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(suppliesData.Id, Is.EqualTo(id));
+            Assert.That(suppliesData.ProductType, Is.EqualTo(productType));
+            Assert.That(suppliesData.DeliveryDate, Is.EqualTo(deliveryDate));
+            Assert.That(suppliesData.Count, Is.EqualTo(count));
+            Assert.That(suppliesData.Products, Is.EqualTo(products));
+        });
+    }
+
+    private static SupplyDataModel CreateDataModel(string? id, ProductType productType, DateTime deliveryDate, int count, List<SupplyProductDataModel>? products)
+            => new(id, productType, deliveryDate, count, products);
+    private static List<SupplyProductDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}
+

PuferFishContracts/PuferFishTests/DataModelsTests/SupplyProductDataModelTests.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+internal class SupplyProductDataModelTests
+{
+    [Test]
+    public void SuppliesIdIsNullOrEmptyTest()
+    {
+        var productSupplies = CreateDataModel(null, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+
+        productSupplies = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SuppliesIdIsNotGuidTest()
+    {
+        var productSupplies = CreateDataModel("suppliesId", Guid.NewGuid().ToString(), 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNullOrEmptyTest()
+    {
+        var productSupplies = CreateDataModel(Guid.NewGuid().ToString(), null, 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+
+        productSupplies = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductIdIsNotGuidTest()
+    {
+        var productSupplies = CreateDataModel(Guid.NewGuid().ToString(), "productId", 1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var productSupplies = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+        productSupplies = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -1);
+        Assert.That(() => productSupplies.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var supplyId = Guid.NewGuid().ToString();
+        var productId = Guid.NewGuid().ToString();
+        var count = 1;
+        var productSupplies = CreateDataModel(supplyId, productId, count);
+        Assert.That(() => productSupplies.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(productSupplies.SupplyId, Is.EqualTo(supplyId));
+            Assert.That(productSupplies.ProductId, Is.EqualTo(productId));
+            Assert.That(productSupplies.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static SupplyProductDataModel CreateDataModel(string? suppliesId, string? productId, int count)
+        => new(suppliesId, productId, count);
+}

PuferFishContracts/PuferFishTests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PuferFishContracts.DataModels;
+using PuferFishContracts.Extensions;
+using PuferFishContracts.Exceptions;
+
+namespace PuferFishTests.DataModelsTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "Фамилия Имя Отчество", Guid.NewGuid().ToString(),
+        DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "Фамилия Имя Отчество",
+        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", "Фамилия Имя Отчество", 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(), "Фамилия Имя Отчество", null,
+        DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(),
+        Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+"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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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(), "Фамилия Имя Отчество",
+        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 = "Фамилия Имя Отчество";
+        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);
+}

PuferFishContracts/PuferFishTests/PuferFishTests.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="..\PuferFishContracts\PuferFishContracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>