2(0).IntermediateResult

BusinessLogic/BusinessLogic.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Moq" Version="4.20.72" />
+  </ItemGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="Tests"/>
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2"/>
+	</ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\IcecreamVan\IcecreamVan.csproj" />
+  </ItemGroup>
+
+</Project>

BusinessLogic/Implementations/ManufactureBLC.cs

@@ -0,0 +1,34 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class ManufactureBLC(IManufacturerContract mc, ILogger logger) : IManufactureBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly IManufacturerContract _mc = mc;
+
+    public List<ManufacturerDataModel> GetAllManufacturers()
+    {
+        return [];
+    }
+
+    public ManufacturerDataModel GetManufacturerByData(string data)
+    {
+        return new("", "", "", "");
+    }
+
+    public void InsertManufacturer(ManufacturerDataModel manufacturerDataModel)
+    {
+    }
+
+    public void UpdateManufacturer(ManufacturerDataModel manufacturerDataModel)
+    {
+    }
+
+    public void DeleteManufacturer(string id)
+    {
+    }
+}

BusinessLogic/Implementations/PostBLC.cs

@@ -0,0 +1,44 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class PostBLC(IPostContract pc, ILogger logger) : IPostBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPostContract _pc = pc;
+
+    public List<PostDataModel> GetAllDataOfPost(string postId)
+    {
+        return [];
+    }
+
+    public List<PostDataModel> GetAllPosts(bool onlyActive)
+    {
+        return [];
+    }
+
+    public PostDataModel GetPostByData(string data)
+    {
+        return new("", "", PostType.None, 0, true, DateTime.Now);
+    }
+
+    public void InsertPost(PostDataModel postDataModel)
+    {
+    }
+
+    public void RestorePost(string id)
+    {
+    }
+
+    public void UpdatePost(PostDataModel postDataModel)
+    {
+    }
+
+    public void DeletePost(string id)
+    {
+    }
+}

BusinessLogic/Implementations/ProductBLC.cs

@@ -0,0 +1,44 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class ProductBLC(IProductContract prc, ILogger logger) : IProductBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly IProductContract _prc = prc;
+    public List<ProductDataModel> GetAllProducts(bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public List<ProductDataModel> GetAllProductsByManufacturer(string manufacturerId, bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId)
+    {
+        return [];
+    }
+
+    public ProductDataModel GetProductByData(string data)
+    {
+        return new("", "", ProductType.None, 0, true);
+    }
+
+    public void InsertProduct(ProductDataModel productDataModel)
+    {
+    }
+
+    public void UpdateProduct(ProductDataModel productDataModel)
+    {
+    }
+
+    public void DeleteProduct(string id)
+    {
+    }
+}

BusinessLogic/Implementations/SalaryBLC.cs

@@ -0,0 +1,25 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class SalaryBLC(ISalaryContract salc, ILogger logger) : ISalaryBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISalaryContract _salc = salc;
+    public void CalculateSalaryByMounth(DateTime date)
+    {
+    }
+
+    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        return [];
+    }
+
+    public List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId)
+    {
+        return [];
+    }
+}

BusinessLogic/Implementations/SaleBLC.cs

@@ -0,0 +1,40 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class SaleBLC(ISaleContract sc, ILogger logger) : ISaleBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISaleContract _sc = sc;
+    public List<SaleDataModel> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate)
+    {
+        return [];
+    }
+
+    public List<SaleDataModel> GetAllSalesByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate)
+    {
+        return [];
+    }
+
+    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        return [];
+    }
+
+    public SaleDataModel GetSaleByData(string data)
+    {
+        return new("", "", 0, DiscountType.None, 0, true, []);
+    }
+
+    public void InsertSale(SaleDataModel saleDataModel)
+    {
+    }
+
+    public void CancelSale(string id)
+    {
+    }
+}

BusinessLogic/Implementations/WorkerBLC.cs

@@ -0,0 +1,48 @@
+using IcecreamVan.BusinessLogicContracts;
+using IcecreamVan.StoragesContracts;
+using IcecreamVan.DataModels;
+using Microsoft.Extensions.Logging;
+
+namespace BusinessLogic.Implementations;
+
+internal class WorkerBLC(IWorkerContract wc, ILogger logger) : IWorkerBLC
+{
+    private readonly ILogger _logger = logger;
+    private readonly IWorkerContract _wc = wc;
+    public List<WorkerDataModel> GetAllWorkers(bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public List<WorkerDataModel> GetAllWorkersByPost(string postId, bool onlyActive = true)
+    {
+        return [];
+    }
+
+    public WorkerDataModel GetWorkerByData(string data)
+    {
+        return new("", "", "", "", DateTime.Now, DateTime.Now, true);
+    }
+
+    public void InsertWorker(WorkerDataModel workerDataModel)
+    {
+    }
+
+    public void UpdateWorker(WorkerDataModel workerDataModel)
+    {
+    }
+
+    public void DeleteWorker(string id)
+    {
+    }
+}

IcecreamVan/BusinessLogicContracts/IManufactureBLC.cs

@@ -0,0 +1,16 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface IManufactureBLC
+{
+    List<ManufacturerDataModel> GetAllManufacturers();
+
+    ManufacturerDataModel GetManufacturerByData(string data);
+
+    void InsertManufacturer(ManufacturerDataModel manufacturerDataModel);
+
+    void UpdateManufacturer(ManufacturerDataModel manufacturerDataModel);
+
+    void DeleteManufacturer(string id);
+}

IcecreamVan/BusinessLogicContracts/IPostBLC.cs

@@ -0,0 +1,20 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface IPostBLC
+{
+    List<PostDataModel> GetAllPosts(bool onlyActive);
+
+    List<PostDataModel> GetAllDataOfPost(string postId);
+
+    PostDataModel GetPostByData(string data);
+
+    void InsertPost(PostDataModel postDataModel);
+
+    void UpdatePost(PostDataModel postDataModel);
+
+    void DeletePost(string id);
+
+    void RestorePost(string id);
+}

IcecreamVan/BusinessLogicContracts/IProductBLC.cs

@@ -0,0 +1,20 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface IProductBLC
+{
+    List<ProductDataModel> GetAllProducts(bool onlyActive = true);
+
+    List<ProductDataModel> GetAllProductsByManufacturer(string manufacturerId, bool onlyActive = true);
+
+    List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId);
+
+    ProductDataModel GetProductByData(string data);
+
+    void InsertProduct(ProductDataModel productDataModel);
+
+    void UpdateProduct(ProductDataModel productDataModel);
+
+    void DeleteProduct(string id);
+}

IcecreamVan/BusinessLogicContracts/ISalaryBLC.cs

@@ -0,0 +1,12 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface ISalaryBLC
+{
+    List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate);
+
+    List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId);
+
+    void CalculateSalaryByMounth(DateTime date);
+}

IcecreamVan/BusinessLogicContracts/ISaleBLC.cs

@@ -0,0 +1,18 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface ISaleBLC
+{
+    List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate);
+
+    List<SaleDataModel> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate);
+
+    SaleDataModel GetSaleByData(string data);
+
+    void InsertSale(SaleDataModel saleDataModel);
+
+    void CancelSale(string id);
+}

IcecreamVan/BusinessLogicContracts/IWorkerBLC.cs

@@ -0,0 +1,23 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.BusinessLogicContracts;
+
+public interface IWorkerBLC
+{
+    List<WorkerDataModel> GetAllWorkers(bool onlyActive = true);
+
+    List<WorkerDataModel> GetAllWorkersByPost(string postId, bool onlyActive =
+   true);
+
+    List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+
+    List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true);
+
+    WorkerDataModel GetWorkerByData(string data);
+
+    void InsertWorker(WorkerDataModel workerDataModel);
+
+    void UpdateWorker(WorkerDataModel workerDataModel);
+
+    void DeleteWorker(string id);
+}

IcecreamVan/DataModels/ManufacturerDataModel.cs

@@ -0,0 +1,28 @@
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+public class ManufacturerDataModel(string id, string manufacturerName, string? prevManufacturerName, string? prevPrevManufacturerName) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string ManufacturerName { get; private set; } = manufacturerName;
+
+    public string? PrevManufacturerName { get; private set; } = prevManufacturerName;
+
+    public string? PrevPrevManufacturerName { get; private set; } = prevPrevManufacturerName;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field ID is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The field ID value is NOT a unique identifier");
+
+        if (ManufacturerName.IsEmpty())
+            throw new ValidationException("Field ManufacturerName is empty");
+    }
+}

IcecreamVan/DataModels/PostDataModel.cs

@@ -0,0 +1,39 @@
+using IcecreamVan.Enums;
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+public class PostDataModel(string id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string PostName { get; private set; } = postName;
+
+    public PostType PostType { get; private set; } = postType;
+
+    public double Salary { get; private set; } = salary;
+
+    public bool IsActual { get; private set; } = isActual;
+
+    public DateTime ChangeDate { get; private set; } = changeDate;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field ID is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The ID value is NOT a unique identifier");
+
+        if (PostName.IsEmpty())
+            throw new ValidationException("Name is empty");
+
+        if (PostType == PostType.None)
+            throw new ValidationException("Type is empty");
+
+        if (Salary <= 0)
+            throw new ValidationException("Salary is empty");
+    }
+}

IcecreamVan/DataModels/ProductDataModel.cs

@@ -0,0 +1,40 @@
+using IcecreamVan.Enums;
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+// 4. У продукта, в свою очередь, есть производитель (Manufacturer -> Product) и тип (перечисление),
+// а также информация об изменениях расценки (Product -> 5. History)
+
+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 ID value is NOT a unique identifier");
+
+        if (ProductName.IsEmpty())
+            throw new ValidationException("Name is empty");
+
+        if (ProductType == ProductType.None)
+            throw new ValidationException("Type is empty");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

IcecreamVan/DataModels/ProductHistoryDataModel.cs

@@ -0,0 +1,26 @@
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.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 Product ID is empty");
+
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The value is NOT a unique identifier");
+
+        if (OldPrice <= 0)
+            throw new ValidationException("Field OldPrice is less than or equal to 0");
+    }
+}

IcecreamVan/DataModels/SalaryDataModel.cs

@@ -0,0 +1,26 @@
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+public class SalaryDataModel(string workerId, DateTime salaryDate, double workerSalary) : IValidation
+{
+    public string WorkerId { get; private set; } = workerId;
+
+    public DateTime SalaryDate { get; private set; } = salaryDate;
+
+    public double Salary { get; private set; } = workerSalary;
+
+    public void Validate()
+    {
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field Worker ID is empty");
+
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The Worker ID value is NOT a unique identifier");
+
+        if (Salary <= 0)
+            throw new ValidationException("Field Salary is less than or equal to 0");
+    }
+}

IcecreamVan/DataModels/SaleDataModel.cs

@@ -0,0 +1,48 @@
+using IcecreamVan.Enums;
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+// 2. Продажа, помимо работника, содержит клиента/покупателя (Buyer -> Sale) и СПИСОК ПРОДУКТОВ (3. SaleProduct -> Sale)
+
+public class SaleDataModel(string id, string workerId, 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 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 ID is not a unique identifier");
+
+        if (WorkerId.IsEmpty())
+            throw new ValidationException("Field Worker ID is empty");
+
+        if (!WorkerId.IsGuid())
+            throw new ValidationException("The Worker ID 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");
+    }
+}

IcecreamVan/DataModels/SaleProductDataModel.cs

@@ -0,0 +1,34 @@
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+// 3. Каждый продукт связан с продажей промежуточной информацией о количестве данного продукта (4. Product -> SaleProduct)
+
+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 Sale ID is empty");
+
+        if (!SaleId.IsGuid())
+            throw new ValidationException("The Sale ID value is NOT a unique identifier");
+
+        if (ProductId.IsEmpty())
+            throw new ValidationException("Field Product ID is empty");
+
+        if (!ProductId.IsGuid())
+            throw new ValidationException("The Product ID value is NOT a unique identifier");
+
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

IcecreamVan/DataModels/WorkerDataModel.cs

@@ -0,0 +1,59 @@
+using System.Text.RegularExpressions;
+using IcecreamVan.Extensions;
+using IcecreamVan.Infrastructure;
+using IcecreamVan.Exceptions;
+
+namespace IcecreamVan.DataModels;
+
+// 1. Работник (Worker -> 2. Sale)  фигурирует затем в продажах,
+// имеет определенную должность (Post -> Worker), имеет отношение к зачислению з/п (Worker -> Salary)
+
+public class WorkerDataModel(string id, string fio, string postId, string phoneNumber, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string FIO { get; private set; } = fio;
+
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
+    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 ID value is NOT a unique identifier");
+
+        if (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (PostId.IsEmpty())
+            throw new ValidationException("Field Post ID is empty");
+
+        if (!PostId.IsGuid())
+            throw new ValidationException("The Post ID value 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()})");
+
+        if (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+
+        if (!Regex.IsMatch(PhoneNumber, @"^(8|\+7)\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{2}[-.\s]?\d{2}")) // *
+            throw new ValidationException("Field PhoneNumber is NOT a phone number");
+    }
+}

IcecreamVan/Enums/DiscountType.cs

@@ -0,0 +1,9 @@
+namespace IcecreamVan.Enums;
+
+[Flags]
+public enum DiscountType
+{
+    None = 0,
+    OnSale = 1,
+    Certificate = 2
+}

IcecreamVan/Enums/PostType.cs

@@ -0,0 +1,9 @@
+namespace IcecreamVan.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Chef = 1,
+    Cashier = 2,
+    Assistant = 3
+}

IcecreamVan/Enums/ProductType.cs

@@ -0,0 +1,9 @@
+namespace IcecreamVan.Enums;
+
+public enum ProductType
+{
+    None = 0,
+    Icecream = 1,
+    Milkshake = 2,
+    Souvenir = 3
+}

IcecreamVan/Exceptions/ValidationException.cs

@@ -0,0 +1,117 @@
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace IcecreamVan.Exceptions;
+
+/*
+
+Необходимо реализовать приложение для автоматизации работы 
+фургончика с мороженным «Снегурочка». В фургончике трудятся 
+работники на разных должностях, они отвечают за готовку,
+продажу, перемещение. Необходимо фиксировать продажи различного
+мороженного (разных типов от разных производителей). Предусмотреть
+возможность начисления ежемесячной зарплаты работникам на основе выполненных продаж.
+
+*/
+
+public class ValidationException(string message) : Exception(message)
+{
+}
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned LIST is NULL") { }
+}
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in STORAGE: {ex.Message}", ex) { }
+}
+
+public class ElementExistsException : Exception
+{
+    public string ParamName { get; private set; }
+    public string ParamValue { get; private set; }
+
+    public ElementExistsException(string paramName, string paramValue) : base($"There is already an element with SAME VALUE{paramValue} of parameter {paramName}")
+    { ParamName = paramName; ParamValue = paramValue; }
+}
+
+public class ElementNotFoundException : Exception
+{
+    public string Value { get; private set; }
+    public ElementNotFoundException(string value) : base($"Element NOT FOUND at value = {value}") { Value = value; }
+}
+
+public class IncorrectDatesException : Exception
+{
+    public IncorrectDatesException(DateTime start, DateTime end) : base($"The END date must be LATER than the START date..StartDate: {start: dd.MM.YYYY}. EndDate: {end:dd.MM.YYYY}") { } 
+}
+
+public static class DateTimeExtensions
+{
+    public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+    {
+        return date >= olderDate;
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/*
+
+ Questions :
+ 1. Регулярные выражения (regex или regexp) -
+ последовательность символов, которая определяет шаблон поиска.
+ Используется при проверки соответствия строки определенному шаблону (например, проверка формата email-адреса).
+ Один из основных инструментов - Метасимволы.
+ Специальные символы, имеющие особое значение. Вот некоторые из наиболее распространенных:
+ .  Соответствует любому одиночному символу(кроме новой строки, если не указано иное).
+ ^  - началу строки.
+ $  - концу строки.
+ *  - нулю или более повторениям предыдущего символа или группы.
+ +  - одному или более повторениям предыдущего символа или группы.
+ ?  - нулю или одному повторению предыдущего символа или группы.
+ ([!] СМ. BuyerDataModel / WorkerDM [!])
+
+ Regex.Matches(text, pattern) - выполняет поиск всех соответствий шаблону pattern в тексте text.
+ MatchCollection - коллекция найденных соответствий.
+ match.Value - свойство объекта Match, содержащее найденную подстроку.
+
+
+ 2. В Solution Explorer -> Выбр. роект(щёлкнув), в который вы хотите добавить ссылку, Add -> Project Reference…
+ (или “Добавить” -> “Ссылка на проект…”). В открывшемся окне отметить проект, который хочу подключить
+ ВАЖНО : Не допускать циклических зависимостей + Убедиться, что подключаемые классы и методы,
+ для исп. в другом проекте, имеют модификатор доступа public / internal (по умолчанию)
+ делает их доступными только в пределах текущей сборки. 
+
+
+ 3. В C# тестирование обычно выполняется с использованием фреймворков, таких как MSTest, NUnit или xUnit.
+ Независимо от фреймворка, Visual Studio предоставляет удобный интерфейс для запуска тестов.
+
+ Запуск тестов через Test Explorer: Открыть Test Explorer: Test -> Windows -> Test Explorer (или Ctrl+E, T).
+ Иногда может потребоваться нажать кнопку “Refresh” в Test Explorer.
+ Щелкните правой кнопкой мыши по имени теста в Test Explorer и выберите “Run Selected Tests”
+(или “Запустить выбранные тесты”). Можно выбрать несколько тестов, удерживая Ctrl или Shift и щелкая по ним, а затем запустить их.
+
+*/

IcecreamVan/Extensions/StringExtensions.cs

@@ -0,0 +1,14 @@
+namespace IcecreamVan.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 _);
+    }
+}

IcecreamVan/IcecreamVan.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+  </ItemGroup>
+
+</Project>

IcecreamVan/Infrastructure/IValidation.cs

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

IcecreamVan/StoragesContracts/IManufacturerContract.cs

@@ -0,0 +1,20 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface IManufacturerContract
+{
+    List<ManufacturerDataModel> GetList();
+
+    ManufacturerDataModel? GetElementById(string id);
+
+    ManufacturerDataModel? GetElementByName(string name);
+
+    ManufacturerDataModel? GetElementByOldName(string oldName);
+
+    void AddElement(ManufacturerDataModel manufDataModel);
+
+    void UpdElement(ManufacturerDataModel manufDataModel);
+
+    void DelElement(string id);
+}

IcecreamVan/StoragesContracts/IPostContract.cs

@@ -0,0 +1,22 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface IPostContract
+{
+    List<PostDataModel> GetList(bool onlyActual = true);
+
+    List<PostDataModel> GetPostHistory(string postId);
+
+    PostDataModel? GetElementById(string id);
+
+    PostDataModel? GetElementByName(string name);
+
+    void AddElement(PostDataModel postDataModel);
+
+    void UpdElement(PostDataModel postDataModel);
+
+    void DelElement(string id);
+
+    void ResElement(string id);
+}

IcecreamVan/StoragesContracts/IProductContract.cs

@@ -0,0 +1,20 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface IProductContract
+{
+    List<ProductDataModel> GetList(bool onlyActive = true, string? manufacturerID = null);
+
+    List<ProductHistoryDataModel> GetProductHistoryById(string productId);
+
+    ProductDataModel? GetElementById(string id);
+
+    ProductDataModel? GetElementByName(string name);
+
+    void AddElement(ProductDataModel prodDataModel);
+
+    void UpdElement(ProductDataModel prodDataModel);
+
+    void DelElement(string id);
+}

IcecreamVan/StoragesContracts/ISalaryContract.cs

@@ -0,0 +1,10 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface ISalaryContract
+{
+    List<SalaryDataModel> GetList(DateTime startD, DateTime endD, string? workerID = null);
+
+    void AddElement(SalaryDataModel salary);
+}

IcecreamVan/StoragesContracts/ISaleContract.cs

@@ -0,0 +1,14 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface ISaleContract
+{
+    List<SaleDataModel> GetList(DateTime? startD = null, DateTime? endD = null, string? workerID = null, string? buyerID = null, string? productID = null);
+
+    SaleDataModel? GetElementById(string id);
+
+    void AddElement(SaleDataModel saleDataModel);
+
+    void DelElement(string id);
+}

IcecreamVan/StoragesContracts/IWorkerContract.cs

@@ -0,0 +1,18 @@
+using IcecreamVan.DataModels;
+
+namespace IcecreamVan.StoragesContracts;
+
+public interface IWorkerContract
+{
+    List<WorkerDataModel> GetList(bool onlyActive = true, string? postID = null, DateTime? fromBD = null, DateTime? toBD = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+
+    WorkerDataModel? GetElementById(string id);
+
+    WorkerDataModel? GetElementByName(string fio);
+
+    void AddElement(WorkerDataModel workerDataModel);
+
+    void UpdElement(WorkerDataModel workerDataModel);
+
+    void DelElement(string id);
+}

IcecreamVanSnowMaiden.sln

@@ -0,0 +1,37 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34525.116
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IcecreamVan", "IcecreamVan\IcecreamVan.csproj", "{A0730374-6964-4D45-A425-049EAE498DEC}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tests", "Tests\Tests.csproj", "{FC61899B-2BD9-43C9-AA66-6BF1A6FE2F48}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BusinessLogic", "BusinessLogic\BusinessLogic.csproj", "{45D1B6A1-441D-4020-A4EB-22F21F54243C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A0730374-6964-4D45-A425-049EAE498DEC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A0730374-6964-4D45-A425-049EAE498DEC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A0730374-6964-4D45-A425-049EAE498DEC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A0730374-6964-4D45-A425-049EAE498DEC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FC61899B-2BD9-43C9-AA66-6BF1A6FE2F48}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FC61899B-2BD9-43C9-AA66-6BF1A6FE2F48}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FC61899B-2BD9-43C9-AA66-6BF1A6FE2F48}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FC61899B-2BD9-43C9-AA66-6BF1A6FE2F48}.Release|Any CPU.Build.0 = Release|Any CPU
+		{45D1B6A1-441D-4020-A4EB-22F21F54243C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{45D1B6A1-441D-4020-A4EB-22F21F54243C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{45D1B6A1-441D-4020-A4EB-22F21F54243C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{45D1B6A1-441D-4020-A4EB-22F21F54243C}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {9B025B6B-EB5B-42BD-ABD4-4F16CF081CD4}
+	EndGlobalSection
+EndGlobal

Tests/BLCTests/ManufactureBLCTest.cs

@@ -0,0 +1,353 @@
+using IcecreamVan.BusinessLogicContracts;
+using BusinessLogic.Implementations;
+using IcecreamVan.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+
+using NUnit.Framework;
+using Moq;
+
+namespace Tests.BLCTests;
+
+[TestFixture]
+internal class ManufactureBLCTest
+{
+    private IManufactureBLC _Mblc;
+    private Mock<IManufacturerContract> _Msc;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _Msc = new Mock<IManufacturerContract>();
+        _Mblc = new ManufactureBLC(_Msc.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _Msc.Reset();
+    }
+
+    [Test]
+    public void GetAllManufacturers_ReturnListOfRecords_Test()
+    {
+        //Arrange 
+        var listOriginal = new List<ManufacturerDataModel>() {
+           new(Guid.NewGuid().ToString(), "name 1", null, null),
+           new(Guid.NewGuid().ToString(), "name 2", null, null),
+           new(Guid.NewGuid().ToString(), "name 3", null, null),
+        };
+        _Msc.Setup(x => x.GetList()).Returns(listOriginal);
+        //Act 
+        var list = _Mblc.GetAllManufacturers();
+        //Assert 
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+    }
+
+    [Test]
+    public void GetAllManufacturers_ReturnEmptyList_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.GetList()).Returns([]);
+        //Act 
+        var list = _Mblc.GetAllManufacturers();
+        //Assert 
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _Msc.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllManufacturers_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetAllManufacturers(), Throws.TypeOf<NullListException>());
+        _Msc.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllManufacturers_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.GetList()).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetAllManufacturers(), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetManufacturerByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        var record = new ManufacturerDataModel(id, "name", null, null);
+        _Msc.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act 
+        var element =
+        _Mblc.GetManufacturerByData(id);
+        //Assert 
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _Msc.Verify(x =>
+      x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetManufacturerByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange 
+        var manufacturerName = "name";
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(), manufacturerName, null, null);
+        _Msc.Setup(x => x.GetElementByName(manufacturerName)).Returns(record);
+        //Act 
+        var element = _Mblc.GetManufacturerByData(manufacturerName);
+        //Assert 
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.ManufacturerName, Is.EqualTo(manufacturerName));
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetManufacturerByData_GetByOldName_ReturnRecord_Test()
+    {
+        //Arrange 
+        var manufacturerOldName = "name before";
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(), "name", manufacturerOldName, null);
+        _Msc.Setup(x => x.GetElementByOldName(manufacturerOldName)).Returns(record);
+        //Act 
+        var element = _Mblc.GetManufacturerByData(manufacturerOldName);
+        //Assert 
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PrevManufacturerName, Is.EqualTo(manufacturerOldName));
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetManufacturerByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetManufacturerByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Mblc.GetManufacturerByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Msc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetManufacturerByData__GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetManufacturerByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _Msc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void
+   GetManufacturerByData_GetByNameOrOldName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetManufacturerByData("name"), Throws.TypeOf<ElementNotFoundException>());
+        _Msc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetManufacturerByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _Msc.Setup(x => x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetManufacturerByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _Mblc.GetManufacturerByData("name"), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetManufacturerByData_GetByOldName_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.GetElementByOldName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.GetManufacturerByData("name"), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _Msc.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertManufacturer_CorrectRecord_Test()
+    {
+        //Arrange 
+        var flag = false;
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(), "name", null, null);
+        _Msc.Setup(x => x.AddElement(It.IsAny<ManufacturerDataModel>())).Callback((ManufacturerDataModel x) =>
+         {
+             flag = x.Id == record.Id && x.ManufacturerName == record.ManufacturerName;
+         });
+        //Act 
+        _Mblc.InsertManufacturer(record);
+        //Assert 
+        _Msc.Verify(x => x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertManufacturer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.AddElement(It.IsAny<ManufacturerDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert 
+        Assert.That(() => _Mblc.InsertManufacturer(new(Guid.NewGuid().ToString(), "name", null, null)), Throws.TypeOf<ElementExistsException>());
+        _Msc.Verify(x => x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertManufacturer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.InsertManufacturer(null), Throws.TypeOf<ArgumentNullException>());
+        _Msc.Verify(x => x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+ 
+    [Test]
+    public void InsertManufacturer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.InsertManufacturer(new ManufacturerDataModel("id", "name", null, null)), Throws.TypeOf<ValidationException>());
+        _Msc.Verify(x => x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.AddElement(It.IsAny<ManufacturerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.InsertManufacturer(new(Guid.NewGuid().ToString(), "name", null, null)), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateManufacturer_CorrectRecord_Test()
+    {
+        //Arrange 
+        var flag = false;
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(), "name", null, null);
+        _Msc.Setup(x => x.UpdElement(It.IsAny<ManufacturerDataModel>())).Callback((ManufacturerDataModel x) =>
+         {
+             flag = x.Id == record.Id && x.ManufacturerName == record.ManufacturerName;
+         });
+        //Act 
+        _Mblc.UpdateManufacturer(record);
+        //Assert 
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void
+   UpdateManufacturer_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert 
+        Assert.That(() => _Mblc.UpdateManufacturer(new(Guid.NewGuid().ToString(), "name", null, null)), Throws.TypeOf<ElementNotFoundException>());
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateManufacturer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert 
+        Assert.That(() => _Mblc.UpdateManufacturer(new(Guid.NewGuid().ToString(), "name", null, null)), Throws.TypeOf<ElementExistsException>());
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateManufacturer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.UpdateManufacturer(null), Throws.TypeOf<ArgumentNullException>());
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateManufacturer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.UpdateManufacturer(new ManufacturerDataModel("id", "name", null, null)), Throws.TypeOf<ValidationException>());
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.UpdateManufacturer(new(Guid.NewGuid().ToString(), "name", null, null)), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteManufacturer_CorrectRecord_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _Msc.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _Mblc.DeleteManufacturer(id);
+        //Assert 
+        _Msc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void DeleteManufacturer_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        _Msc.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert 
+        Assert.That(() => _Mblc.DeleteManufacturer(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _Msc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteManufacturer_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.DeleteManufacturer(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Mblc.DeleteManufacturer(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Msc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteManufacturer_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Mblc.DeleteManufacturer("id"), Throws.TypeOf<ValidationException>());
+        _Msc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Msc.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Mblc.DeleteManufacturer(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _Msc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

Tests/BLCTests/PostBLCTest.cs

@@ -0,0 +1,453 @@
+using IcecreamVan.BusinessLogicContracts;
+using BusinessLogic.Implementations;
+using IcecreamVan.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using IcecreamVan.Enums;
+using NUnit.Framework;
+using Moq;
+
+namespace Tests.BLCTests;
+
+[TestFixture]
+internal class PostBLCTests
+{
+    private IPostBLC _Pblc;
+    private Mock<IPostContract> _Psc;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _Psc = new Mock<IPostContract>();
+        _Pblc = new PostBLC(_Psc.Object, new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _Psc.Reset();
+    }
+
+    [Test]
+    public void GetAllPosts_ReturnListOfRecords_Test()
+    {
+        //Arrange 
+        var listOriginal = new List<PostDataModel>()
+        {
+            new(Guid.NewGuid().ToString(),"name 1", PostType.Assistant, 10, true, DateTime.UtcNow),
+            new(Guid.NewGuid().ToString(), "name 2", PostType.Assistant, 10, false, DateTime.UtcNow),
+            new(Guid.NewGuid().ToString(), "name 3", PostType.Assistant, 10, true, DateTime.UtcNow),
+        };
+        _Psc.Setup(x => x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+        //Act 
+        var listOnlyActive = _Pblc.GetAllPosts(true);
+        var listAll = _Pblc.GetAllPosts(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(listAll, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(listAll, Is.EquivalentTo(listOriginal));
+        });
+        _Psc.Verify(x => x.GetList(true), Times.Once);
+        _Psc.Verify(x => x.GetList(false), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPosts_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _Psc.Setup(x => x.GetList(It.IsAny<bool>())).Returns([]);
+        //Act 
+        var listOnlyActive = _Pblc.GetAllPosts(true);
+        var listAll = _Pblc.GetAllPosts(false);
+        //Assert 
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(listAll, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(listAll, Has.Count.EqualTo(0));
+        });
+        _Psc.Verify(x => x.GetList(It.IsAny<bool>()), Times.Exactly(2));
+    }
+
+    [Test]
+    public void GetAllPosts_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllPosts(It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _Psc.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllPosts_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.GetList(It.IsAny<bool>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllPosts(It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_ReturnListOfRecords_Test()
+    {
+        //Arrange 
+        var postId = Guid.NewGuid().ToString();
+        var listOriginal = new List<PostDataModel>()
+        {
+            new(postId, "name 1", PostType.Assistant, 10, true, DateTime.UtcNow),
+            new(postId, "name 2", PostType.Assistant, 10, false, DateTime.UtcNow)
+        };
+        _Psc.Setup(x => x.GetPostHistory(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _Pblc.GetAllDataOfPost(postId);
+        //Assert 
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        _Psc.Verify(x => x.GetPostHistory(postId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_ReturnEmptyList_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.GetPostHistory(It.IsAny<string>())).Returns([]);
+        //Act 
+        var list = _Pblc.GetAllDataOfPost(Guid.NewGuid().ToString());
+        //Assert 
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _Psc.Verify(x => x.GetPostHistory(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllDataOfPost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Pblc.GetAllDataOfPost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.GetPostHistory(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllDataOfPost("id"), Throws.TypeOf<ValidationException>());
+        _Psc.Verify(x => x.GetPostHistory(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllDataOfPost(Guid.NewGuid().ToString()), Throws.TypeOf<NullListException>());
+        _Psc.Verify(x => x.GetPostHistory(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDataOfPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.GetPostHistory(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetAllDataOfPost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.GetPostHistory(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetPostByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        var record = new PostDataModel(id, "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        _Psc.Setup(x => x.GetElementById(id)).Returns(record);
+        //Act 
+        var element = _Pblc.GetPostByData(id);
+        //Assert 
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _Psc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetPostByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange 
+        var postName = "name";
+        var record = new PostDataModel(Guid.NewGuid().ToString(), postName, PostType.Assistant, 10, true, DateTime.UtcNow);
+        _Psc.Setup(x => x.GetElementByName(postName)).Returns(record);
+        //Act 
+        var element = _Pblc.GetPostByData(postName);
+        //Assert 
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PostName, Is.EqualTo(postName));
+        _Psc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetPostByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetPostByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Pblc.GetPostByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _Psc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetPostByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _Pblc.GetPostByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _Psc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _Psc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetPostByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetPostByData("name"), Throws.TypeOf<ElementNotFoundException>());
+        _Psc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _Psc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetPostByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        _Psc.Setup(x => x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.GetPostByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        Assert.That(() => _Pblc.GetPostByData("name"), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _Psc.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertPost_CorrectRecord_Test()
+    {
+        //Arrange 
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow.AddDays(-1));
+        _Psc.Setup(x => x.AddElement(It.IsAny<PostDataModel>()))
+         .Callback((PostDataModel x) =>
+         {
+             flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary && x.ChangeDate == record.ChangeDate;
+         });
+        //Act 
+        _Pblc.InsertPost(record);
+        //Assert 
+        _Psc.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void InsertPost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.AddElement(It.IsAny<PostDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert 
+        Assert.That(() => _Pblc.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementExistsException>());
+        _Psc.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertPost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.InsertPost(null), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertPost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.InsertPost(new PostDataModel("id", "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<ValidationException>());
+        _Psc.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _Psc.Setup(x => x.AddElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _Pblc.InsertPost(new(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdatePost_CorrectRecord_Test()
+    {
+        //Arrange 
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow.AddDays(-1));
+        _Psc.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Callback((PostDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.PostName == record.PostName && x.PostType == record.PostType && x.Salary == record.Salary && x.ChangeDate == record.ChangeDate;
+        });
+        //Act 
+        _Pblc.UpdatePost(record);
+        //Assert 
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void UpdatePost_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementNotFoundException(""));
+        //Act&Assert 
+        Assert.That(() => _Pblc.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementNotFoundException>());
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdatePost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        //Act&Assert 
+        Assert.That(() => _Pblc.UpdatePost(new(Guid.NewGuid().ToString(), "anme", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<ElementExistsException>());
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdatePost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.UpdatePost(null), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdatePost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _Pblc.UpdatePost(new PostDataModel("id", "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<ValidationException>());
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdatePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.UpdElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.UpdatePost(new(Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow)), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeletePost_CorrectRecord_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _Psc.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act 
+        _Pblc.DeletePost(id);
+        //Assert 
+        _Psc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void DeletePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        _Psc.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert 
+        Assert.That(() => _Pblc.DeletePost(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _Psc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeletePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.DeletePost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Pblc.DeletePost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+ 
+    [Test]
+    public void DeletePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.DeletePost("id"), Throws.TypeOf<ValidationException>());
+        _Psc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeletePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.DeletePost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void RestorePost_CorrectRecord_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _Psc.Setup(x => x.ResElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act 
+        _Pblc.RestorePost(id);
+        //Assert 
+        _Psc.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+
+    [Test]
+    public void RestorePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange 
+        var id = Guid.NewGuid().ToString();
+        _Psc.Setup(x => x.ResElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert 
+        Assert.That(() => _Pblc.RestorePost(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _Psc.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void RestorePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.RestorePost(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _Pblc.RestorePost(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _Psc.Verify(x => x.ResElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void RestorePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _Pblc.RestorePost("id"), Throws.TypeOf<ValidationException>());
+        _Psc.Verify(x => x.ResElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void RestorePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange 
+        _Psc.Setup(x => x.ResElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() => _Pblc.RestorePost(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _Psc.Verify(x => x.ResElement(It.IsAny<string>()), Times.Once);
+    }
+}

Tests/BLCTests/SalaryBLCTest.cs

@@ -0,0 +1,5 @@
+namespace Tests.BLCTests;
+
+internal class SalaryBLCTest
+{
+}

Tests/BLCTests/SaleBLCTest.cs

@@ -0,0 +1,5 @@
+namespace Tests.BLCTests;
+
+internal class SaleBLCTest
+{
+}

Tests/SnowMaidenDMTests/ManufacturerDMTest.cs

@@ -0,0 +1,55 @@
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using NUnit.Framework;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class ManufacturerDMTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var manufacturer = CreateDataModel(null, "name");
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(string.Empty, "name");
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var manufacturer = CreateDataModel("id", "name");
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ManufacturerNameIsNullOrEmptyTest()
+    {
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var manufacturerId = Guid.NewGuid().ToString();
+        var manufacturerName = "name";
+        var prevManufacturerName = "LastName";
+        var prevPrevManufacturerName = "EarlierName";
+        var manufacturer = CreateDataModel(manufacturerId, manufacturerName, prevManufacturerName, prevPrevManufacturerName);
+        Assert.That(() => manufacturer.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(manufacturer.Id, Is.EqualTo(manufacturerId));
+            Assert.That(manufacturer.ManufacturerName, Is.EqualTo(manufacturerName));
+            Assert.That(manufacturer.PrevManufacturerName, Is.EqualTo(prevManufacturerName));
+            Assert.That(manufacturer.PrevPrevManufacturerName, Is.EqualTo(prevPrevManufacturerName));
+        });
+    }
+
+    private static ManufacturerDataModel CreateDataModel(string id, string manufacturerName, string? prevManufacturerName = null, string? prevPrevManufacturerName = null) =>
+        new(id, manufacturerName, prevManufacturerName, prevPrevManufacturerName);
+}

Tests/SnowMaidenDMTests/PostDMTest.cs

@@ -0,0 +1,76 @@
+using NUnit.Framework;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using IcecreamVan.Exceptions;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class PostDMTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), null, PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Assistant, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), "name", PostType.Assistant, -10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var postId = Guid.NewGuid().ToString();
+        var postName = "name";
+        var postType = PostType.Assistant;
+        var salary = 10;
+        var isActual = false;
+        var changeDate = DateTime.UtcNow.AddDays(-1);
+        var post = CreateDataModel(postId, postName, postType, salary, isActual, changeDate);
+        Assert.That(() => post.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(post.Id, Is.EqualTo(postId));
+            Assert.That(post.PostName, Is.EqualTo(postName));
+            Assert.That(post.PostType, Is.EqualTo(postType));
+            Assert.That(post.Salary, Is.EqualTo(salary));
+            Assert.That(post.IsActual, Is.EqualTo(isActual));
+            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+        });
+    }
+
+    private static PostDataModel CreateDataModel(string id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) =>
+        new(id, postName, postType, salary, isActual, changeDate);
+}

Tests/SnowMaidenDMTests/ProductDMTest.cs

@@ -0,0 +1,91 @@
+using NUnit.Framework;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using IcecreamVan.Exceptions;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class ProductDMTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(null, "name", ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(string.Empty, "name", ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var product = CreateDataModel("id", "name", ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ProductNameIsEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Souvenir, 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 ManufacturerIdIsNullOrEmptyTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), null, ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ManufacturerIdIsNotGuidTest()
+    {
+        var product = CreateDataModel("Mid", "name", ProductType.Souvenir, 10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Souvenir, 0, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+        product = CreateDataModel(Guid.NewGuid().ToString(), "name", ProductType.Souvenir, -10, false);
+        Assert.That(() => product.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var productId = Guid.NewGuid().ToString();
+        var productName = "name";
+        var productType = ProductType.Souvenir;
+        var productManufacturerId = Guid.NewGuid().ToString();
+        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);
+}

Tests/SnowMaidenDMTests/ProductHistoryDMTest.cs

@@ -0,0 +1,53 @@
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using NUnit.Framework;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class ProductHistoryDMTest
+{
+    [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);
+}

Tests/SnowMaidenDMTests/SalaryDMTest.cs

@@ -0,0 +1,53 @@
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using NUnit.Framework;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class SalaryDMTest
+{
+    [Test]
+    public void WorkerIdIsEmptyTest()
+    {
+        var salary = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var salary = CreateDataModel("workerId", DateTime.Now, 10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, 0);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+        salary = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -10);
+        Assert.That(() => salary.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var salaryDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var workerSalary = 10;
+        var salary = CreateDataModel(workerId, salaryDate, workerSalary);
+        Assert.That(() => salary.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(salary.WorkerId, Is.EqualTo(workerId));
+            Assert.That(salary.SalaryDate, Is.EqualTo(salaryDate));
+            Assert.That(salary.Salary, Is.EqualTo(workerSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateDataModel(string? workerId, DateTime salaryDate, double workerSalary) =>
+        new(workerId, salaryDate, workerSalary);
+}

Tests/SnowMaidenDMTests/SaleDMTest.cs

@@ -0,0 +1,88 @@
+using NUnit.Framework;
+using IcecreamVan.DataModels;
+using IcecreamVan.Enums;
+using IcecreamVan.Exceptions;
+
+[TestFixture]
+internal class SaleDMTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, 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(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId", 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(), 0, DiscountType.OnSale, 10, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(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(), 10, DiscountType.OnSale, 10, false, null);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(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, 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.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, double sum, DiscountType discountType, double discount, bool isCancel, List<SaleProductDataModel>? products) =>
+        new(id, workerId, sum, discountType, discount, isCancel, products);
+
+    private static List<SaleProductDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

Tests/SnowMaidenDMTests/SaleProductDMTest.cs

@@ -0,0 +1,69 @@
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using NUnit.Framework;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class SaleProductDMTest
+{
+    [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);
+}

Tests/SnowMaidenDMTests/WorkerDMTest.cs

@@ -0,0 +1,110 @@
+using System;
+using IcecreamVan.DataModels;
+using IcecreamVan.Exceptions;
+using NUnit.Framework;
+
+namespace SnowMaidenTests.DataModelsTest;
+
+[TestFixture]
+internal class WorkerDMTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "FIO", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "FIO", Guid.NewGuid().ToString(), "number", 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(), "number", 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(), "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), "number", 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, "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "FIO", string.Empty, "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "FIO", Guid.NewGuid().ToString(), null, DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(Guid.NewGuid().ToString(), "FIO", Guid.NewGuid().ToString(), string.Empty, DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsIncorrectTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "FIO", Guid.NewGuid().ToString(), "777", DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "FIO", "postId", "number", 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(), "number", 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(), "number", 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(), "number", 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 phoneNumber = "+7(903)123-45-67";
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, phoneNumber, 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.PhoneNumber, Is.EqualTo(phoneNumber));
+            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, string? number, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, postId, number, birthDate, employmentDate, isDeleted);
+}

Tests/Tests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+    <PackageReference Include="NUnit.Analyzers" Version="3.6.1" />
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\BusinessLogic\BusinessLogic.csproj" />
+    <ProjectReference Include="..\IcecreamVan\IcecreamVan.csproj" />
+  </ItemGroup>
+
+</Project>