фикс

AndDietCokeProject/AndDietCokeBusinessLogic/AndDietCokeBusinessLogic.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFramework>net8.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<InternalsVisibleTo Include="AndDietCokeTests" />
+		<InternalsVisibleTo Include ="DynamicProxyGenAssembly2"/>
+	</ItemGroup>
+	
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.3" />
+	</ItemGroup>
+
+	<ItemGroup>
+	  <ProjectReference Include="..\AndDietCokeContracts\AndDietCokeContracts.csproj" />
+	</ItemGroup>
+
+</Project>

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/ClientBusinessLogicContract.cs

@@ -0,0 +1,109 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+internal class ClientBusinessLogicContract(IClientStorageContract clientStorageContract, ILogger logger) : IClientBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IClientStorageContract _clientStorageContract = clientStorageContract;
+
+    public List<СlientDataModel> GetAllClients()
+    {
+        _logger.LogInformation("GetAllClients");
+        return _clientStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public СlientDataModel GetClientByData(string data)
+    {
+        _logger.LogInformation("Get client by data: {data}", data);
+
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+
+        if (data.IsGuid())
+        {
+            return _clientStorageContract.GetElementById(data) ??
+                   throw new ElementNotFoundException(data);
+        }
+
+        if (Regex.IsMatch(data, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+        {
+            return _clientStorageContract.GetElementByPhoneNumber(data) ??
+                   throw new ElementNotFoundException(data);
+        }
+
+        return _clientStorageContract.GetElementByFIO(data) ??
+               throw new ElementNotFoundException(data);
+    }
+
+    public void InsertClient(СlientDataModel clientDataModel)
+    {
+        _logger.LogInformation("New client data: {json}",
+            JsonSerializer.Serialize(clientDataModel));
+
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+
+        try
+        {
+            _clientStorageContract.AddElement(clientDataModel);
+        }
+        catch (ElementExistsException ex)
+        {
+            _logger.LogWarning(ex, "Failed to insert client - already exists");
+            throw;
+        }
+    }
+
+    public void UpdateClient(СlientDataModel clientDataModel)
+    {
+        _logger.LogInformation("Update client data: {json}",
+            JsonSerializer.Serialize(clientDataModel));
+
+        ArgumentNullException.ThrowIfNull(clientDataModel);
+        clientDataModel.Validate();
+
+        try
+        {
+            _clientStorageContract.UpdElement(clientDataModel);
+        }
+        catch (ElementNotFoundException ex)
+        {
+            _logger.LogWarning(ex, "Failed to update client - not found");
+            throw;
+        }
+    }
+
+    public void DeleteClient(string id)
+    {
+        _logger.LogInformation("Delete client by id: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+
+        try
+        {
+            _clientStorageContract.DelElement(id);
+        }
+        catch (ElementNotFoundException ex)
+        {
+            _logger.LogWarning(ex, "Failed to delete client - not found");
+            throw;
+        }
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/DishBusinessLogicContract.cs

@@ -0,0 +1,155 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+
+internal class DishBusinessLogicContract(
+    IDishStorageContracts dishStorageContracts,
+    ILogger<DishBusinessLogicContract> logger) : IDishBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IDishStorageContracts _dishStorageContract = dishStorageContracts;
+
+    public List<DishDataModel> GetAllDishes()
+    {
+        _logger.LogInformation("GetAllDishes called");
+
+        var result = _dishStorageContract.GetList();
+        return result ?? throw new NullListException();
+    }
+
+    public List<DishHistoryDataModel> GetDishHistory(string dishId)
+    {
+        _logger.LogInformation("GetDishHistory called for dishId: {dishId}", dishId);
+
+        if (dishId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(dishId));
+        }
+
+        if (!dishId.IsGuid())
+        {
+            throw new ValidationException("DishId must be a valid GUID");
+        }
+
+        var result = _dishStorageContract.GetHistoryByProductId(dishId);
+        return result ?? throw new NullListException();
+    }
+
+    public DishDataModel? GetDishById(string id)
+    {
+        _logger.LogInformation("GetDishById called with id: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id must be a valid GUID");
+        }
+
+        return _dishStorageContract.GetElementById(id)
+            ?? throw new ElementNotFoundException(id);
+    }
+
+    public DishDataModel? GetDishByName(string name)
+    {
+        _logger.LogInformation("GetDishByName called with name: {name}", name);
+
+        if (name.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(name));
+        }
+
+        return _dishStorageContract.GetElementByName(name)
+            ?? throw new ElementNotFoundException(name);
+    }
+
+    public void InsertDish(DishDataModel dishDataModel)
+    {
+        _logger.LogInformation("InsertDish called with data: {data}",
+            JsonSerializer.Serialize(dishDataModel));
+
+        ArgumentNullException.ThrowIfNull(dishDataModel);
+        dishDataModel.Validate();
+
+        // Проверка на уникальность имени
+        var existingByName = _dishStorageContract.GetElementByName(dishDataModel.Name);
+        if (existingByName != null)
+        {
+            throw new ValidationException($"Dish with name '{dishDataModel.Name}' already exists");
+        }
+
+        // Проверка на уникальность ID
+        var existingById = _dishStorageContract.GetElementById(dishDataModel.Id);
+        if (existingById != null)
+        {
+            throw new ValidationException($"Dish with ID {dishDataModel.Id} already exists");
+        }
+
+        _dishStorageContract.AddElement(dishDataModel);
+        _logger.LogInformation("Dish successfully inserted: {id}", dishDataModel.Id);
+    }
+
+    public void UpdateDish(DishDataModel dishDataModel)
+    {
+        _logger.LogInformation("UpdateDish called with data: {data}",
+            JsonSerializer.Serialize(dishDataModel));
+
+        ArgumentNullException.ThrowIfNull(dishDataModel);
+        dishDataModel.Validate();
+
+        // Проверка что блюдо существует
+        var existingDish = _dishStorageContract.GetElementById(dishDataModel.Id);
+        if (existingDish == null)
+        {
+            throw new ElementNotFoundException(dishDataModel.Id);
+        }
+
+        // Проверка на уникальность имени (если имя изменилось)
+        if (!existingDish.Name.Equals(dishDataModel.Name, StringComparison.OrdinalIgnoreCase))
+        {
+            var dishWithSameName = _dishStorageContract.GetElementByName(dishDataModel.Name);
+            if (dishWithSameName != null)
+            {
+                throw new ValidationException($"Dish with name '{dishDataModel.Name}' already exists");
+            }
+        }
+
+        _dishStorageContract.UpdElement(dishDataModel);
+        _logger.LogInformation("Dish successfully updated: {id}", dishDataModel.Id);
+    }
+
+    public void DeleteDish(string id)
+    {
+        _logger.LogInformation("DeleteDish called with id: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id must be a valid GUID");
+        }
+
+        // Проверка что блюдо существует
+        var existingDish = _dishStorageContract.GetElementById(id);
+        if (existingDish == null)
+        {
+            throw new ElementNotFoundException(id);
+        }
+
+        _dishStorageContract.DelElement(id);
+        _logger.LogInformation("Dish successfully deleted: {id}", id);
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/Dish_OrderBusinessLogicContract.cs

@@ -0,0 +1,160 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+
+internal class Dish_OrderBusinessLogicContract(
+    IDish_OrderStorageContract dishOrderStorageContract,
+    ILogger<Dish_OrderBusinessLogicContract> logger) : IDish_OrderBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IDish_OrderStorageContract _dishOrderStorageContract = dishOrderStorageContract;
+
+    public List<Dish_OrderDataModel> GetAllDishOrders(string? orderId = null, string? dishId = null)
+    {
+        _logger.LogInformation(
+            "GetAllDishOrders called with params: orderId={orderId}, dishId={dishId}",
+            orderId, dishId);
+
+        if (orderId != null && !orderId.IsGuid())
+        {
+            throw new ValidationException("OrderId must be a valid GUID");
+        }
+
+        if (dishId != null && !dishId.IsGuid())
+        {
+            throw new ValidationException("DishId must be a valid GUID");
+        }
+
+        var result = _dishOrderStorageContract.GetList(orderId, dishId);
+
+        return result ?? throw new NullListException();
+    }
+
+    public Dish_OrderDataModel? GetDishOrderById(string orderId, string dishId)
+    {
+        _logger.LogInformation(
+            "GetDishOrderById called with params: orderId={orderId}, dishId={dishId}",
+            orderId, dishId);
+
+        if (orderId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(orderId));
+        }
+
+        if (!orderId.IsGuid())
+        {
+            throw new ValidationException("OrderId must be a valid GUID");
+        }
+
+        if (dishId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(dishId));
+        }
+
+        if (!dishId.IsGuid())
+        {
+            throw new ValidationException("DishId must be a valid GUID");
+        }
+
+        return _dishOrderStorageContract.GetElementById(orderId, dishId)
+            ?? throw new ElementNotFoundException($"DishOrder with orderId={orderId} and dishId={dishId} not found");
+    }
+
+    public void InsertDishOrder(Dish_OrderDataModel dishOrderDataModel)
+    {
+        _logger.LogInformation(
+            "InsertDishOrder called with data: {data}",
+            JsonSerializer.Serialize(dishOrderDataModel));
+
+        ArgumentNullException.ThrowIfNull(dishOrderDataModel);
+        dishOrderDataModel.Validate();
+
+        // Проверка на существование записи
+        var existing = _dishOrderStorageContract.GetElementById(
+            dishOrderDataModel.OrderId,
+            dishOrderDataModel.DishId);
+
+        if (existing != null)
+        {
+            throw new ValidationException(
+                $"DishOrder with orderId={dishOrderDataModel.OrderId} and dishId={dishOrderDataModel.DishId} already exists");
+        }
+
+        _dishOrderStorageContract.AddElement(dishOrderDataModel);
+        _logger.LogInformation(
+            "DishOrder successfully inserted: orderId={orderId}, dishId={dishId}",
+            dishOrderDataModel.OrderId, dishOrderDataModel.DishId);
+    }
+
+    public void UpdateDishOrder(Dish_OrderDataModel dishOrderDataModel)
+    {
+        _logger.LogInformation(
+            "UpdateDishOrder called with data: {data}",
+            JsonSerializer.Serialize(dishOrderDataModel));
+
+        ArgumentNullException.ThrowIfNull(dishOrderDataModel);
+        dishOrderDataModel.Validate();
+
+        // Проверка что запись существует
+        var existing = _dishOrderStorageContract.GetElementById(
+            dishOrderDataModel.OrderId,
+            dishOrderDataModel.DishId);
+
+        if (existing == null)
+        {
+            throw new ElementNotFoundException(
+                $"DishOrder with orderId={dishOrderDataModel.OrderId} and dishId={dishOrderDataModel.DishId} not found");
+        }
+
+        _dishOrderStorageContract.UpdElement(dishOrderDataModel);
+        _logger.LogInformation(
+            "DishOrder successfully updated: orderId={orderId}, dishId={dishId}",
+            dishOrderDataModel.OrderId, dishOrderDataModel.DishId);
+    }
+
+    public void DeleteDishOrder(string orderId, string dishId)
+    {
+        _logger.LogInformation(
+            "DeleteDishOrder called with params: orderId={orderId}, dishId={dishId}",
+            orderId, dishId);
+
+        if (orderId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(orderId));
+        }
+
+        if (!orderId.IsGuid())
+        {
+            throw new ValidationException("OrderId must be a valid GUID");
+        }
+
+        if (dishId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(dishId));
+        }
+
+        if (!dishId.IsGuid())
+        {
+            throw new ValidationException("DishId must be a valid GUID");
+        }
+
+        // Проверка что запись существует
+        var existing = _dishOrderStorageContract.GetElementById(orderId, dishId);
+        if (existing == null)
+        {
+            throw new ElementNotFoundException(
+                $"DishOrder with orderId={orderId} and dishId={dishId} not found");
+        }
+
+        _dishOrderStorageContract.DelElement(orderId, dishId);
+        _logger.LogInformation(
+            "DishOrder successfully deleted: orderId={orderId}, dishId={dishId}",
+            orderId, dishId);
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/EmployeeBusinessLogicContract.cs

@@ -0,0 +1,144 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+
+internal class EmployeeBusinessLogicContract(
+    IEmployeeStoragesContracts employeeStoragesContracts,
+    ILogger<EmployeeBusinessLogicContract> logger) : IEmployeeBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IEmployeeStoragesContracts _employeeStorageContract = employeeStoragesContracts;
+
+    public List<EmployeeDataModel> GetAllEmployees(
+        bool onlyActive = true,
+        string? positionId = null,
+        DateTime? fromBirthDate = null,
+        DateTime? toBirthDate = null,
+        DateTime? fromEmploymentDate = null,
+        DateTime? toEmploymentDate = null)
+    {
+        _logger.LogInformation(
+            "GetAllEmployees params: onlyActive={onlyActive}, positionId={positionId}, " +
+            "fromBirthDate={fromBirthDate}, toBirthDate={toBirthDate}, " +
+            "fromEmploymentDate={fromEmploymentDate}, toEmploymentDate={toEmploymentDate}",
+            onlyActive, positionId, fromBirthDate, toBirthDate, fromEmploymentDate, toEmploymentDate);
+
+        if (positionId != null && positionId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(positionId));
+        }
+
+        if (positionId != null && !positionId.IsGuid())
+        {
+            throw new ValidationException("The value in the field positionId is not a unique identifier.");
+        }
+
+        if (fromBirthDate.HasValue && toBirthDate.HasValue && fromBirthDate > toBirthDate)
+        {
+            throw new IncorrectDatesException(fromBirthDate.Value, toBirthDate.Value);
+        }
+
+        if (fromEmploymentDate.HasValue && toEmploymentDate.HasValue && fromEmploymentDate > toEmploymentDate)
+        {
+            throw new IncorrectDatesException(fromEmploymentDate.Value, toEmploymentDate.Value);
+        }
+
+        var result = _employeeStorageContract.GetList(
+            onlyActive,
+            positionId,
+            fromBirthDate,
+            toBirthDate,
+            fromEmploymentDate,
+            toEmploymentDate);
+
+        return result ?? throw new NullListException();
+    }
+
+    public EmployeeDataModel? GetEmployeeById(string id)
+    {
+        _logger.LogInformation("GetEmployeeById params: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("The value in the field id is not a unique identifier.");
+        }
+
+        return _employeeStorageContract.GetElementById(id) ?? throw new ElementNotFoundException(id);
+    }
+
+    public EmployeeDataModel? GetEmployeeByFIO(string fio)
+    {
+        _logger.LogInformation("GetEmployeeByFIO params: {fio}", fio);
+
+        if (fio.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(fio));
+        }
+
+        return _employeeStorageContract.GetElementByFIO(fio) ?? throw new ElementNotFoundException(fio);
+    }
+
+    public void InsertEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("InsertEmployee params: {json}", JsonSerializer.Serialize(employeeDataModel));
+
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+
+        if (_employeeStorageContract.GetElementById(employeeDataModel.Id) != null)
+        {
+            throw new DuplicateEmployeeException(employeeDataModel.Id);
+        }
+
+        _employeeStorageContract.AddElement(employeeDataModel);
+    }
+
+    public void UpdateEmployee(EmployeeDataModel employeeDataModel)
+    {
+        _logger.LogInformation("UpdateEmployee params: {json}", JsonSerializer.Serialize(employeeDataModel));
+
+        ArgumentNullException.ThrowIfNull(employeeDataModel);
+        employeeDataModel.Validate();
+
+        if (_employeeStorageContract.GetElementById(employeeDataModel.Id) == null)
+        {
+            throw new ElementNotFoundException(employeeDataModel.Id);
+        }
+
+        _employeeStorageContract.UpdElement(employeeDataModel);
+    }
+
+    public void DeleteEmployee(string id)
+    {
+        _logger.LogInformation("DeleteEmployee params: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("The value in the field id is not a unique identifier.");
+        }
+
+        if (_employeeStorageContract.GetElementById(id) == null)
+        {
+            throw new ElementNotFoundException(id);
+        }
+
+        _employeeStorageContract.DelElement(id);
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/OrderBusinessLogicContract.cs

@@ -0,0 +1,105 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StorageContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+
+internal class OrderBusinessLogicContract(
+    IOrderStorageContracts orderStorageContract,
+    ILogger<OrderBusinessLogicContract> logger) : IOrderBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IOrderStorageContracts _orderStorageContract = orderStorageContract;
+
+    public List<OrderDataModels> GetAllOrders(string? clientId = null, string? employeedId = null, string? dishId = null)
+    {
+        _logger.LogInformation(
+            "GetAllOrders called with filters - ClientId: {clientId}, EmployeeId: {employeedId}, DishId: {dishId}",
+            clientId, employeedId, dishId);
+
+        // Валидация параметров фильтрации
+        if (clientId != null && !clientId.IsGuid())
+        {
+            throw new ValidationException("ClientId must be a valid GUID");
+        }
+
+        if (employeedId != null && !employeedId.IsGuid())
+        {
+            throw new ValidationException("EmployeeId must be a valid GUID");
+        }
+
+        if (dishId != null && !dishId.IsGuid())
+        {
+            throw new ValidationException("DishId must be a valid GUID");
+        }
+
+        var result = _orderStorageContract.GetList(clientId, employeedId, dishId);
+        return result ?? throw new NullListException();
+    }
+
+    public OrderDataModels? GetOrderById(string id)
+    {
+        _logger.LogInformation("GetOrderById called with id: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("OrderId must be a valid GUID");
+        }
+
+        var order = _orderStorageContract.GetElementById(id);
+        return order ?? throw new ElementNotFoundException($"Order with id {id} not found");
+    }
+
+    public void InsertOrder(OrderDataModels orderDataModel)
+    {
+        _logger.LogInformation("InsertOrder called with data: {data}",
+            JsonSerializer.Serialize(orderDataModel));
+
+        ArgumentNullException.ThrowIfNull(orderDataModel);
+        orderDataModel.Validate();
+
+        // Проверка на существование заказа с таким ID
+        var existingOrder = _orderStorageContract.GetElementById(orderDataModel.Id);
+        if (existingOrder != null)
+        {
+            throw new ValidationException($"Order with id {orderDataModel.Id} already exists");
+        }
+
+        _orderStorageContract.AddElement(orderDataModel);
+        _logger.LogInformation("Order successfully created with id: {id}", orderDataModel.Id);
+    }
+
+    public void DeleteOrder(string id)
+    {
+        _logger.LogInformation("DeleteOrder called for id: {id}", id);
+
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("OrderId must be a valid GUID");
+        }
+
+        // Проверка что заказ существует
+        var existingOrder = _orderStorageContract.GetElementById(id);
+        if (existingOrder == null)
+        {
+            throw new ElementNotFoundException($"Order with id {id} not found");
+        }
+
+        _orderStorageContract.DelElement(id);
+        _logger.LogInformation("Order successfully deleted with id: {id}", id);
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/PositionBusinessLogicContract.cs

@@ -0,0 +1,110 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace AndDietCokeBusinessLogic.Implementations;
+
+internal class PositionBusinessLogicContract(IPositionStorageContract positionStorageContract, ILogger logger)
+    : IPositionBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly IPositionStorageContract _positionStorageContract = positionStorageContract;
+
+    public List<PositionDataModel> GetAllPositions(bool onlyActive = true)
+    {
+        _logger.LogInformation("GetAllPositions params: {onlyActive}", onlyActive);
+        throw new NotImplementedException("GetList method is not properly implemented in storage contract");
+
+    }
+
+    public List<PositionDataModel> GetAllDataOfPosition(string positionId)
+    {
+        _logger.LogInformation("GetAllDataOfPosition for {positionId}", positionId);
+        if (positionId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(positionId));
+        }
+        if (!positionId.IsGuid())
+        {
+            throw new ValidationException("The value in the field positionId is not a unique identifier.");
+        }
+
+        var position = _positionStorageContract.GetElementById(positionId);
+        if (position == null)
+        {
+            throw new ElementNotFoundException(positionId);
+        }
+
+        return new List<PositionDataModel> { position };
+    }
+
+    public PositionDataModel GetPositionByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+
+        PositionDataModel position;
+        if (data.IsGuid())
+        {
+            position = _positionStorageContract.GetElementById(data);
+        }
+        else
+        {
+            position = _positionStorageContract.GetElementByName(data);
+        }
+
+        return position ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertPosition(PositionDataModel positionDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(positionDataModel));
+        ArgumentNullException.ThrowIfNull(positionDataModel);
+        positionDataModel.Validate();
+        _positionStorageContract.AddElement(positionDataModel);
+    }
+
+    public void UpdatePosition(PositionDataModel positionDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(positionDataModel));
+        ArgumentNullException.ThrowIfNull(positionDataModel);
+        positionDataModel.Validate();
+        _positionStorageContract.UpdElement(positionDataModel);
+    }
+
+    public void DeletePosition(string id)
+    {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _positionStorageContract.DelElement(id);
+    }
+
+    public void RestorePosition(string id)
+    {
+        _logger.LogInformation("Restore by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _positionStorageContract.ResElement(id);
+    }
+}

AndDietCokeProject/AndDietCokeBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -0,0 +1,65 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StorageContract;
+using Microsoft.Extensions.Logging;
+
+internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract, ILogger logger) : ISalaryBusinessLogicsContracts
+{
+    private readonly ILogger _logger = logger;
+    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
+
+    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
+    {
+        _logger.LogInformation("GetAllSalariesByPeriod params: {fromDate}, {toDate}", fromDate, toDate);
+
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+
+        return _salaryStorageContract.GetList(fromDate, toDate) ?? throw new NullListException();
+    }
+
+    public List<SalaryDataModel> GetAllSalariesByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId)
+    {
+        _logger.LogInformation("GetAllSalariesByPeriodByEmployee params: {fromDate}, {toDate}, {employeeId}",
+            fromDate, toDate, employeeId);
+
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+
+        if (employeeId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(employeeId));
+        }
+
+        if (!employeeId.IsGuid())
+        {
+            throw new ValidationException("The value in the field employeeId is not a unique identifier.");
+        }
+
+        return _salaryStorageContract.GetList(fromDate, toDate, employeeId) ?? throw new NullListException();
+    }
+
+    public void CalculateSalaryByMonth(DateTime date)
+    {
+        _logger.LogInformation("CalculateSalaryByMonth: {date}", date);
+
+        var startDate = new DateTime(date.Year, date.Month, 1);
+        var endDate = new DateTime(date.Year, date.Month, DateTime.DaysInMonth(date.Year, date.Month));
+
+        // Get all salaries for the month to avoid duplicate calculations
+        var existingSalaries = _salaryStorageContract.GetList(startDate, endDate);
+
+        if (existingSalaries != null && existingSalaries.Any())
+        {
+            _logger.LogWarning("Salaries for period {startDate} to {endDate} already exist", startDate, endDate);
+            return;
+        }
+
+    }
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IClientBusinessLogicsContrats.cs

@@ -0,0 +1,16 @@
+using AndDietCokeContracts.DataModels;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IClientBusinessLogicsContracts
+{
+    List<СlientDataModel> GetAllClients();
+
+    СlientDataModel GetClientByData(string data);
+
+    void InsertClient(СlientDataModel clientDataModel);
+
+    void UpdateClient(СlientDataModel clientDataModel);
+
+    void DeleteClient(string id);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IDishBusinessLogicsContrats.cs

@@ -0,0 +1,21 @@
+using AndDietCokeContracts.DataModels;
+using System.Collections.Generic;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IDishBusinessLogicsContracts
+{
+    List<DishDataModel> GetAllDishes();
+
+    List<DishHistoryDataModel> GetDishHistory(string dishId);
+
+    DishDataModel? GetDishById(string id);
+
+    DishDataModel? GetDishByName(string name);
+
+    void InsertDish(DishDataModel dishDataModel);
+
+    void UpdateDish(DishDataModel dishDataModel);
+
+    void DeleteDish(string id);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IDish_OrderBusinessLogicsContrats.cs

@@ -0,0 +1,17 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IDish_OrderBusinessLogicsContracts
+{
+    List<Dish_OrderDataModel> GetAllDishOrders(string? orderId = null, string? dishId = null);
+    Dish_OrderDataModel? GetDishOrderById(string orderId, string dishId);
+    void InsertDishOrder(Dish_OrderDataModel dishOrderDataModel);
+    void UpdateDishOrder(Dish_OrderDataModel dishOrderDataModel);
+    void DeleteDishOrder(string orderId, string dishId);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IEmployeeBusinessLogicsContrats.cs

@@ -0,0 +1,19 @@
+using AndDietCokeContracts.DataModels;
+using System.Collections.Generic;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IEmployeeBusinessLogicsContracts
+{
+    List<EmployeeDataModel> GetAllEmployees(bool onlyActive = true, string? positionId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+
+    EmployeeDataModel? GetEmployeeById(string id);
+
+    EmployeeDataModel? GetEmployeeByFIO(string fio);
+
+    void InsertEmployee(EmployeeDataModel employeeDataModel);
+
+    void UpdateEmployee(EmployeeDataModel employeeDataModel);
+
+    void DeleteEmployee(string id);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IOrderBusinessLogicsContrats.cs

@@ -0,0 +1,15 @@
+using AndDietCokeContracts.DataModels;
+using System.Collections.Generic;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IOrderBusinessLogicsContracts
+{
+    List<OrderDataModels> GetAllOrders(string? clientId = null, string? employeedId = null, string? dishId = null);
+
+    OrderDataModels? GetOrderById(string id);
+
+    void InsertOrder(OrderDataModels orderDataModel);
+
+    void DeleteOrder(string id);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/IPositionBusinessLogicsContrats.cs

@@ -0,0 +1,15 @@
+using AndDietCokeContracts.DataModels;
+using System.Collections.Generic;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts;
+
+public interface IPositionBusinessLogicsContracts
+{
+    List<PositionDataModel> GetAllPositions(bool onlyActive);
+    List<PositionDataModel> GetAllDataOfPosition(string positionId);
+    PositionDataModel GetPositionByData(string data);
+    void InsertPosition(PositionDataModel positionDataModel);
+    void UpdatePosition(PositionDataModel positionDataModel);
+    void DeletePosition(string id);
+    void RestorePosition(string id);
+}

AndDietCokeProject/AndDietCokeContracts/BusinessLogicsContracts/ISalaryBusinessLogicsContrats.cs

@@ -0,0 +1,13 @@
+using AndDietCokeContracts.DataModels;
+
+namespace AndDietCokeContracts.BusinessLogicsContracts
+{
+    public interface ISalaryBusinessLogicsContracts
+    {
+        List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate);
+
+        List<SalaryDataModel> GetAllSalariesByPeriodByEmployee(DateTime fromDate, DateTime toDate, string employeeId);
+
+        void CalculateSalaryByMonth(DateTime date);
+    }
+}

AndDietCokeProject/AndDietCokeContracts/DataModels/DishHistoryDataModel.cs

@@ -12,6 +12,9 @@ namespace AndDietCokeContracts.DataModels;
 public class DishHistoryDataModel(string productId, double oldPrice, string orderid) : IValidation
 
 {
+    private DateTime dateTime;
+    private double v;
+
     public string DishId { get; private set; } = productId;
     public double OldPrice { get; private set; } = oldPrice;
     public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;

AndDietCokeProject/AndDietCokeContracts/DataModels/Dish_OrderDataModel.cs

@@ -1,13 +1,5 @@
-using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
-using AndDietCokeContracts.Exceptions;
 using AndDietCokeContracts.Extensions;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Xml.Linq;
 
 namespace AndDietCokeContracts.DataModels;
 public class Dish_OrderDataModel(string orderid, string dishid, int count)
@@ -16,14 +8,8 @@ public string OrderId { get; private set; } = orderid;
 public string DishId { get; private set; } = dishid;
 public int Count { get; private set; } = count;
 
-
-
-
-
 public void Validate()
 {
-    
-
     if (OrderId.IsEmpty())
         throw new ValidationException("Field OrderId is empty");
     if (!OrderId.IsGuid())
@@ -34,6 +20,5 @@ public void Validate()
         throw new ValidationException("The value in the field DishId is not a unique identifier");
     if (Count <= 0)
         throw new ValidationException("Field Count is less than or equal to 0"); 
-
     }
 }

AndDietCokeProject/AndDietCokeContracts/DataModels/PositionDataModel.cs

@@ -6,7 +6,7 @@ using System.Text.RegularExpressions;
 using System.Xml;
 namespace AndDietCokeContracts.DataModels;
 
-public class PositionDataModell(string id, string positionId, string positionName, PositionType positionType, double salary, bool isActual, DateTime changeDate) : IValidation
+public class PositionDataModel(string id, string positionId, string positionName, PositionType positionType, double salary, bool isActual, DateTime changeDate) : IValidation
 {
     public string Id { get; private set; } = id;
     public string PositionId { get; private set; } = positionId;

AndDietCokeProject/AndDietCokeContracts/Enums/DishType.cs

@@ -13,6 +13,8 @@ public enum DishType
     Pepperoni = 2,
     BBQChicken = 3,
     Veggie = 4,
-    Cola = 5
+    Cola = 5,
+    Soup = 6,
+    MainCourse = 7
 }
 

AndDietCokeProject/AndDietCokeContracts/Enums/PositionType.cs

@@ -12,5 +12,8 @@ public enum PositionType
     Waiter = 1,
     Сhef = 2,
     Manager = 3,
-    Assistant = 4
+    Assistant = 4,
+    Staff = 5,
+    Developer = 6,
+    QA = 7
 }

AndDietCokeProject/AndDietCokeContracts/Exceptions/DuplicateElementException.cs

@@ -0,0 +1,8 @@
+using AndDietCokeContracts.DataModels;
+
+public class DuplicateEmployeeException : Exception
+{
+    public DuplicateEmployeeException(string id)
+        : base($"Employee with ID {id} already exists") { }
+}
+

AndDietCokeProject/AndDietCokeContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,13 @@
+namespace AndDietCokeContracts.Exceptions;
+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 value{paramValue} of parameter {paramName}")
+	{
+		ParamName = paramName;
+		ParamValue = paramValue;
+	}
+}

AndDietCokeProject/AndDietCokeContracts/Exceptions/ElementNotFoundException.cs

@@ -0,0 +1,10 @@
+namespace AndDietCokeContracts.Exceptions;
+public class ElementNotFoundException : Exception
+{
+	public string Value { get; private set; }
+
+	public ElementNotFoundException(string value) : base($"Element not found at value = {value}")
+	{
+		Value = value;
+	}
+}

AndDietCokeProject/AndDietCokeContracts/Exceptions/IncorrectDatesException.cs

@@ -0,0 +1,5 @@
+namespace AndDietCokeContracts.Exceptions;
+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}") { }
+}

AndDietCokeProject/AndDietCokeContracts/Exceptions/NullListException.cs

@@ -0,0 +1,6 @@
+namespace AndDietCokeContracts.Exceptions;
+
+public class NullListException : Exception
+{
+	public NullListException() : base("The returned list is null") { }
+}

AndDietCokeProject/AndDietCokeContracts/Exceptions/StorageException.cs

@@ -0,0 +1,5 @@
+namespace AndDietCokeContracts.Exceptions;
+public class StorageException : Exception
+{
+	public StorageException(Exception ex) : base($"Error while working in storage: {ex.Message}", ex) { }
+}

AndDietCokeProject/AndDietCokeContracts/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,9 @@
+namespace AndDietCokeContracts.Extensions;
+
+public static class DateTimeExtensions
+{
+	public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+	{
+		return date >= olderDate;
+	}
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IClientStorageContract.cs

@@ -0,0 +1,20 @@
+using AndDietCokeContracts.DataModels;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IClientStorageContract
+{
+	List<СlientDataModel> GetList();
+
+    СlientDataModel? GetElementById(string id);
+
+    СlientDataModel? GetElementByPhoneNumber(string phoneNumber);
+
+    СlientDataModel? GetElementByFIO(string fio);
+
+	void AddElement(СlientDataModel clientDataModel);
+
+	void UpdElement(СlientDataModel clientDataModel);
+
+	void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IDishStorageContracts.cs

@@ -0,0 +1,25 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IDishStorageContracts
+{
+    List<DishDataModel> GetList();
+
+    List<DishHistoryDataModel> GetHistoryByProductId(string dishId);
+
+    DishDataModel? GetElementById(string id);
+
+    DishDataModel? GetElementByName(string name);
+
+    void AddElement(DishDataModel dishDataModel);
+
+    void UpdElement(DishDataModel dishDataModel);
+
+    void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IDish_OrderStorageContract.cs

@@ -0,0 +1,22 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+
+public interface IDish_OrderStorageContract
+{
+    List<Dish_OrderDataModel> GetList(string? orderId = null, string? dishId = null);
+
+    Dish_OrderDataModel? GetElementById(string orderId, string dishId);
+
+    void AddElement(Dish_OrderDataModel dishOrderDataModel);
+
+    void UpdElement(Dish_OrderDataModel dishOrderDataModel);
+
+    void DelElement(string orderId, string dishId);
+}
+

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IEmployeeStoragesContracts.cs

@@ -0,0 +1,16 @@
+using AndDietCokeContracts.DataModels;
+namespace AndDietCokeContracts.StoragesContracts;
+public interface IEmployeeStoragesContracts
+{
+    List<EmployeeDataModel> GetList(bool onlyActive = true, string? positionId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null);
+
+    EmployeeDataModel? GetElementById(string id);
+
+    EmployeeDataModel? GetElementByFIO(string fio);
+
+    void AddElement(EmployeeDataModel employeeDataModel);
+
+    void UpdElement(EmployeeDataModel employeeDataModel);
+
+    void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IOrderStorageContracts.cs

@@ -0,0 +1,14 @@
+using AndDietCokeContracts.DataModels;
+
+namespace AndDietCokeContracts.StorageContracts;
+
+public interface IOrderStorageContracts
+{
+    List<OrderDataModels> GetList(string? clientId = null, string? employeedId = null, string? dishId = null);
+
+    OrderDataModels? GetElementById(string id);
+
+    void AddElement(OrderDataModels orderDataModel);
+
+    void DelElement(string id);
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/IPositionStorageContract.cs

@@ -0,0 +1,19 @@
+using AndDietCokeContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AndDietCokeContracts.StoragesContracts;
+public interface IPositionStorageContract
+{
+    List<PositionDataModel> GetList(bool onlyActual = true);
+    List<PositionDataModel> GetPostWithHistory(string postId);
+    PositionDataModel? GetElementById(string id);
+    PositionDataModel? GetElementByName(string name);
+    void AddElement(PositionDataModel positionDataModell);
+    void UpdElement(PositionDataModel positionDataModell);
+    void DelElement(string id);
+    void ResElement(string id);
+}

AndDietCokeProject/AndDietCokeContracts/StoragesContracts/ISalaryStorageContract.cs

@@ -0,0 +1,11 @@
+using AndDietCokeContracts.DataModels;
+
+namespace AndDietCokeContracts.StorageContract
+{
+    public interface ISalaryStorageContract
+    {
+        List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? employeeId = null);
+
+        void AddElement(SalaryDataModel salaryDataModel);
+    }
+}

AndDietCokeProject/AndDietCokeProject.sln

@@ -7,6 +7,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeContracts", "And
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeTests", "AndDietCokeTests\AndDietCokeTests.csproj", "{97CF49C2-6F17-4FCB-B2AD-D84AED6A1AF9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AndDietCokeBusinessLogic", "AndDietCokeBusinessLogic\AndDietCokeBusinessLogic.csproj", "{950B374D-94CC-4EE2-BD25-E78D5CDA5F2F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -21,8 +23,15 @@ Global
 		{97CF49C2-6F17-4FCB-B2AD-D84AED6A1AF9}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{97CF49C2-6F17-4FCB-B2AD-D84AED6A1AF9}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{97CF49C2-6F17-4FCB-B2AD-D84AED6A1AF9}.Release|Any CPU.Build.0 = Release|Any CPU
+		{950B374D-94CC-4EE2-BD25-E78D5CDA5F2F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{950B374D-94CC-4EE2-BD25-E78D5CDA5F2F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{950B374D-94CC-4EE2-BD25-E78D5CDA5F2F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{950B374D-94CC-4EE2-BD25-E78D5CDA5F2F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {6545237B-96EA-4C80-963A-F4CB39480436}
+	EndGlobalSection
 EndGlobal

AndDietCokeProject/AndDietCokeTests/AndDietCokeTests.csproj

@@ -11,13 +11,16 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="NUnit" Version="3.14.0" />
     <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\AndDietCokeBusinessLogic\AndDietCokeBusinessLogic.csproj" />
     <ProjectReference Include="..\AndDietCokeContracts\AndDietCokeContracts.csproj" />
   </ItemGroup>
 

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/DishBusinessLogicContractTests.cs

@@ -0,0 +1,228 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests
+{
+    [TestFixture]
+    internal class DishBusinessLogicContractTests
+    {
+        private DishBusinessLogicContract _dishBusinessLogic;
+        private Mock<IDishStorageContracts> _dishStorageMock;
+        private Mock<ILogger<DishBusinessLogicContract>> _loggerMock;
+
+        [OneTimeSetUp]
+        public void OneTimeSetUp()
+        {
+            _dishStorageMock = new Mock<IDishStorageContracts>();
+            _loggerMock = new Mock<ILogger<DishBusinessLogicContract>>();
+            _dishBusinessLogic = new DishBusinessLogicContract(
+                _dishStorageMock.Object, 
+                _loggerMock.Object);
+        }
+
+        [SetUp]
+        public void SetUp()
+        {
+            _dishStorageMock.Reset();
+            _loggerMock.Reset();
+        }
+
+        [Test]
+        public void GetAllDishes_ReturnListOfRecords_Test()
+        {
+            // Arrange
+            var testDishes = new List<DishDataModel>
+            {
+                new(Guid.NewGuid().ToString(), "Борщ", DishType.Soup, 250.50, Guid.NewGuid().ToString()),
+                new(Guid.NewGuid().ToString(), "Стейк", DishType.MainCourse, 1200.00, Guid.NewGuid().ToString())
+            };
+
+            _dishStorageMock.Setup(x => x.GetList()).Returns(testDishes);
+
+            // Act
+            var result = _dishBusinessLogic.GetAllDishes();
+
+            // Assert
+            Assert.Multiple(() =>
+            {
+                Assert.That(result, Is.Not.Null);
+                Assert.That(result, Is.EquivalentTo(testDishes));
+            });
+            _dishStorageMock.Verify(x => x.GetList(), Times.Once);
+        }
+
+        [Test]
+        public void GetAllDishes_ReturnEmptyList_Test()
+        {
+            // Arrange
+            _dishStorageMock.Setup(x => x.GetList()).Returns(new List<DishDataModel>());
+
+            // Act
+            var result = _dishBusinessLogic.GetAllDishes();
+
+            // Assert
+            Assert.Multiple(() =>
+            {
+                Assert.That(result, Is.Not.Null);
+                Assert.That(result, Has.Count.EqualTo(0));
+            });
+        }
+
+        [Test]
+        public void GetAllDishes_ReturnNull_ThrowException_Test()
+        {
+            // Arrange
+            _dishStorageMock.Setup(x => x.GetList()).Returns((List<DishDataModel>)null);
+
+            // Act & Assert
+            Assert.That(() => _dishBusinessLogic.GetAllDishes(), 
+                Throws.TypeOf<NullListException>());
+        }
+
+        [Test]
+        public void GetDishHistory_InvalidId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishBusinessLogic.GetDishHistory("invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetDishById_ValidId_ReturnsDish_Test()
+        {
+            // Arrange
+            var dishId = Guid.NewGuid().ToString();
+            var testDish = new DishDataModel(dishId, "Борщ", DishType.Soup, 250.50, Guid.NewGuid().ToString());
+
+            _dishStorageMock.Setup(x => x.GetElementById(dishId))
+                .Returns(testDish);
+
+            // Act
+            var result = _dishBusinessLogic.GetDishById(dishId);
+
+            // Assert
+            Assert.That(result, Is.EqualTo(testDish));
+        }
+
+        [Test]
+        public void GetDishById_NotFound_ThrowException_Test()
+        {
+            // Arrange
+            var dishId = Guid.NewGuid().ToString();
+
+            // Act & Assert
+            Assert.That(() => _dishBusinessLogic.GetDishById(dishId),
+                Throws.TypeOf<ElementNotFoundException>());
+        }
+
+        [Test]
+        public void GetDishByName_ValidName_ReturnsDish_Test()
+        {
+            // Arrange
+            var dishName = "Борщ";
+            var testDish = new DishDataModel(Guid.NewGuid().ToString(), dishName, DishType.Soup, 250.50, Guid.NewGuid().ToString());
+
+            _dishStorageMock.Setup(x => x.GetElementByName(dishName))
+                .Returns(testDish);
+
+            // Act
+            var result = _dishBusinessLogic.GetDishByName(dishName);
+
+            // Assert
+            Assert.That(result, Is.EqualTo(testDish));
+        }
+
+        [Test]
+        public void InsertDish_ValidData_Success_Test()
+        {
+            // Arrange
+            var testDish = new DishDataModel(
+                Guid.NewGuid().ToString(),
+                "Борщ",
+                DishType.Soup,
+                250.50,
+                Guid.NewGuid().ToString());
+
+            // Act
+            _dishBusinessLogic.InsertDish(testDish);
+
+            // Assert
+            _dishStorageMock.Verify(x => x.AddElement(testDish), Times.Once);
+        }
+
+        [Test]
+        public void InsertDish_DuplicateName_ThrowException_Test()
+        {
+            // Arrange
+            var testDish = new DishDataModel(
+                Guid.NewGuid().ToString(),
+                "Борщ",
+                DishType.Soup,
+                250.50,
+                Guid.NewGuid().ToString());
+
+            _dishStorageMock.Setup(x => x.GetElementByName(testDish.Name))
+                .Returns(testDish);
+
+            // Act & Assert
+            Assert.That(() => _dishBusinessLogic.InsertDish(testDish),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void UpdateDish_ValidData_Success_Test()
+        {
+            // Arrange
+            var testDish = new DishDataModel(
+                Guid.NewGuid().ToString(),
+                "Борщ",
+                DishType.Soup,
+                250.50,
+                Guid.NewGuid().ToString());
+
+            _dishStorageMock.Setup(x => x.GetElementById(testDish.Id))
+                .Returns(testDish);
+
+            // Act
+            _dishBusinessLogic.UpdateDish(testDish);
+
+            // Assert
+            _dishStorageMock.Verify(x => x.UpdElement(testDish), Times.Once);
+        }
+
+        [Test]
+        public void DeleteDish_ValidId_Success_Test()
+        {
+            // Arrange
+            var dishId = Guid.NewGuid().ToString();
+            var testDish = new DishDataModel(
+                dishId,
+                "Борщ",
+                DishType.Soup,
+                250.50,
+                Guid.NewGuid().ToString());
+
+            _dishStorageMock.Setup(x => x.GetElementById(dishId))
+                .Returns(testDish);
+
+            // Act
+            _dishBusinessLogic.DeleteDish(dishId);
+
+            // Assert
+            _dishStorageMock.Verify(x => x.DelElement(dishId), Times.Once);
+        }
+
+        [Test]
+        public void DeleteDish_InvalidId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishBusinessLogic.DeleteDish("invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+    }
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/Dish_OrderBusinessLogicsContractsTests.cs

@@ -0,0 +1,313 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests
+{
+    [TestFixture]
+    internal class Dish_OrderBusinessLogicContractTests
+    {
+        private Dish_OrderBusinessLogicContract _dishOrderBusinessLogic;
+        private Mock<IDish_OrderStorageContract> _dishOrderStorageMock;
+        private Mock<ILogger<Dish_OrderBusinessLogicContract>> _loggerMock;
+
+        [OneTimeSetUp]
+        public void OneTimeSetUp()
+        {
+            _dishOrderStorageMock = new Mock<IDish_OrderStorageContract>();
+            _loggerMock = new Mock<ILogger<Dish_OrderBusinessLogicContract>>();
+            _dishOrderBusinessLogic = new Dish_OrderBusinessLogicContract(
+                _dishOrderStorageMock.Object,
+                _loggerMock.Object);
+        }
+
+        [SetUp]
+        public void SetUp()
+        {
+            _dishOrderStorageMock.Reset();
+            _loggerMock.Reset();
+        }
+
+        [Test]
+        public void GetAllDishOrders_ReturnListOfRecords_Test()
+        {
+            // Arrange
+            var testData = new List<Dish_OrderDataModel>
+            {
+                new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 2),
+                new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)
+            };
+
+            _dishOrderStorageMock.Setup(x => x.GetList(It.IsAny<string>(), It.IsAny<string>()))
+                .Returns(testData);
+
+            // Act
+            var result = _dishOrderBusinessLogic.GetAllDishOrders();
+
+            // Assert
+            Assert.Multiple(() =>
+            {
+                Assert.That(result, Is.Not.Null);
+                Assert.That(result, Is.EquivalentTo(testData));
+            });
+            _dishOrderStorageMock.Verify(x => x.GetList(null, null), Times.Once);
+        }
+
+        [Test]
+        public void GetAllDishOrders_WithOrderIdFilter_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var testData = new List<Dish_OrderDataModel>
+            {
+                new(orderId, Guid.NewGuid().ToString(), 3)
+            };
+
+            _dishOrderStorageMock.Setup(x => x.GetList(orderId, It.IsAny<string>()))
+                .Returns(testData);
+
+            // Act
+            var result = _dishOrderBusinessLogic.GetAllDishOrders(orderId);
+
+            // Assert
+            Assert.That(result, Is.EquivalentTo(testData));
+            _dishOrderStorageMock.Verify(x => x.GetList(orderId, null), Times.Once);
+        }
+
+        [Test]
+        public void GetAllDishOrders_WithDishIdFilter_Test()
+        {
+            // Arrange
+            var dishId = Guid.NewGuid().ToString();
+            var testData = new List<Dish_OrderDataModel>
+            {
+                new(Guid.NewGuid().ToString(), dishId, 1)
+            };
+
+            _dishOrderStorageMock.Setup(x => x.GetList(It.IsAny<string>(), dishId))
+                .Returns(testData);
+
+            // Act
+            var result = _dishOrderBusinessLogic.GetAllDishOrders(null, dishId);
+
+            // Assert
+            Assert.That(result, Is.EquivalentTo(testData));
+            _dishOrderStorageMock.Verify(x => x.GetList(null, dishId), Times.Once);
+        }
+
+        [Test]
+        public void GetAllDishOrders_ReturnNull_ThrowException_Test()
+        {
+            // Arrange
+            _dishOrderStorageMock.Setup(x => x.GetList(It.IsAny<string>(), It.IsAny<string>()))
+                .Returns((List<Dish_OrderDataModel>)null);
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetAllDishOrders(),
+                Throws.TypeOf<NullListException>());
+        }
+
+        [Test]
+        public void GetAllDishOrders_InvalidOrderId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetAllDishOrders("invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetAllDishOrders_InvalidDishId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetAllDishOrders(null, "invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetDishOrderById_ValidIds_ReturnsRecord_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var dishId = Guid.NewGuid().ToString();
+            var testRecord = new Dish_OrderDataModel(orderId, dishId, 2);
+
+            _dishOrderStorageMock.Setup(x => x.GetElementById(orderId, dishId))
+                .Returns(testRecord);
+
+            // Act
+            var result = _dishOrderBusinessLogic.GetDishOrderById(orderId, dishId);
+
+            // Assert
+            Assert.That(result, Is.EqualTo(testRecord));
+            _dishOrderStorageMock.Verify(x => x.GetElementById(orderId, dishId), Times.Once);
+        }
+
+        [Test]
+        public void GetDishOrderById_InvalidOrderId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetDishOrderById("invalid", Guid.NewGuid().ToString()),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetDishOrderById_InvalidDishId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetDishOrderById(Guid.NewGuid().ToString(), "invalid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetDishOrderById_NotFound_ThrowException_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var dishId = Guid.NewGuid().ToString();
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.GetDishOrderById(orderId, dishId),
+                Throws.TypeOf<ElementNotFoundException>());
+        }
+
+        [Test]
+        public void InsertDishOrder_ValidData_Success_Test()
+        {
+            // Arrange
+            var testRecord = new Dish_OrderDataModel(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                2);
+
+            // Act
+            _dishOrderBusinessLogic.InsertDishOrder(testRecord);
+
+            // Assert
+            _dishOrderStorageMock.Verify(x => x.AddElement(testRecord), Times.Once);
+        }
+
+        [Test]
+        public void InsertDishOrder_NullData_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.InsertDishOrder(null),
+                Throws.TypeOf<ArgumentNullException>());
+        }
+
+        [Test]
+        public void InsertDishOrder_InvalidCount_ThrowException_Test()
+        {
+            // Arrange
+            var invalidRecord = new Dish_OrderDataModel(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                0); // Invalid count
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.InsertDishOrder(invalidRecord),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void InsertDishOrder_Duplicate_ThrowException_Test()
+        {
+            // Arrange
+            var testRecord = new Dish_OrderDataModel(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                1);
+
+            _dishOrderStorageMock.Setup(x => x.GetElementById(testRecord.OrderId, testRecord.DishId))
+                .Returns(testRecord);
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.InsertDishOrder(testRecord),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void UpdateDishOrder_ValidData_Success_Test()
+        {
+            // Arrange
+            var testRecord = new Dish_OrderDataModel(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                3);
+
+            _dishOrderStorageMock.Setup(x => x.GetElementById(testRecord.OrderId, testRecord.DishId))
+                .Returns(testRecord);
+
+            // Act
+            _dishOrderBusinessLogic.UpdateDishOrder(testRecord);
+
+            // Assert
+            _dishOrderStorageMock.Verify(x => x.UpdElement(testRecord), Times.Once);
+        }
+
+        [Test]
+        public void UpdateDishOrder_NotExists_ThrowException_Test()
+        {
+            // Arrange
+            var testRecord = new Dish_OrderDataModel(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                2);
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.UpdateDishOrder(testRecord),
+                Throws.TypeOf<ElementNotFoundException>());
+        }
+
+        [Test]
+        public void DeleteDishOrder_ValidIds_Success_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var dishId = Guid.NewGuid().ToString();
+            var testRecord = new Dish_OrderDataModel(orderId, dishId, 1);
+
+            _dishOrderStorageMock.Setup(x => x.GetElementById(orderId, dishId))
+                .Returns(testRecord);
+
+            // Act
+            _dishOrderBusinessLogic.DeleteDishOrder(orderId, dishId);
+
+            // Assert
+            _dishOrderStorageMock.Verify(x => x.DelElement(orderId, dishId), Times.Once);
+        }
+
+        [Test]
+        public void DeleteDishOrder_NotExists_ThrowException_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var dishId = Guid.NewGuid().ToString();
+
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.DeleteDishOrder(orderId, dishId),
+                Throws.TypeOf<ElementNotFoundException>());
+        }
+
+        [Test]
+        public void DeleteDishOrder_InvalidOrderId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.DeleteDishOrder("invalid", Guid.NewGuid().ToString()),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void DeleteDishOrder_InvalidDishId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _dishOrderBusinessLogic.DeleteDishOrder(Guid.NewGuid().ToString(), "invalid"),
+                Throws.TypeOf<ValidationException>());
+        }
+    }
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/EmployeeBusinessLogicContractTests.cs

@@ -0,0 +1,268 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class EmployeeBusinessLogicContractTests
+{
+    private EmployeeBusinessLogicContract _employeeBusinessLogicContract;
+    private Mock<IEmployeeStoragesContracts> _employeeStorageContract;
+    private Mock<ILogger<EmployeeBusinessLogicContract>> _logger;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _employeeStorageContract = new Mock<IEmployeeStoragesContracts>();
+        _logger = new Mock<ILogger<EmployeeBusinessLogicContract>>();
+        _employeeBusinessLogicContract = new EmployeeBusinessLogicContract(
+            _employeeStorageContract.Object,
+            _logger.Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _employeeStorageContract.Reset();
+        _logger.Reset();
+    }
+
+    [Test]
+    public void GetAllEmployees_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var testEmployees = new List<EmployeeDataModel>
+        {
+            new(Guid.NewGuid().ToString(), "Иванов И.И.", Guid.NewGuid().ToString(),
+                PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false),
+            new(Guid.NewGuid().ToString(), "Петров П.П.", Guid.NewGuid().ToString(),
+                PositionType.Developer, DateTime.Now.AddYears(-25), DateTime.Now.AddYears(-3), true)
+        };
+
+        _employeeStorageContract.Setup(x => x.GetList(
+            It.IsAny<bool>(), It.IsAny<string>(),
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns(testEmployees);
+
+        // Act
+        var resultActive = _employeeBusinessLogicContract.GetAllEmployees(true);
+        var resultAll = _employeeBusinessLogicContract.GetAllEmployees(false);
+
+        // Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(resultActive, Is.Not.Null);
+            Assert.That(resultAll, Is.Not.Null);
+            Assert.That(resultActive, Is.EquivalentTo(testEmployees));
+            Assert.That(resultAll, Is.EquivalentTo(testEmployees));
+        });
+
+        _employeeStorageContract.Verify(x => x.GetList(true, null, null, null, null, null), Times.Once);
+        _employeeStorageContract.Verify(x => x.GetList(false, null, null, null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllEmployees_WithPositionFilter_Test()
+    {
+        // Arrange
+        var positionId = Guid.NewGuid().ToString();
+        var testEmployees = new List<EmployeeDataModel>
+        {
+            new(Guid.NewGuid().ToString(), "Сидоров С.С.", positionId,
+                PositionType.Developer, DateTime.Now.AddYears(-28), DateTime.Now.AddYears(-4), false)
+        };
+
+        _employeeStorageContract.Setup(x => x.GetList(
+            It.IsAny<bool>(), positionId,
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns(testEmployees);
+
+        // Act
+        var result = _employeeBusinessLogicContract.GetAllEmployees(true, positionId);
+
+        // Assert
+        Assert.That(result, Is.EquivalentTo(testEmployees));
+        _employeeStorageContract.Verify(x => x.GetList(true, positionId, null, null, null, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllEmployees_WithDateFilters_Test()
+    {
+        // Arrange
+        var fromDate = DateTime.Now.AddYears(-5);
+        var toDate = DateTime.Now;
+        var testEmployees = new List<EmployeeDataModel>
+        {
+            new(Guid.NewGuid().ToString(), "Кузнецов К.К.", Guid.NewGuid().ToString(),
+                PositionType.QA, DateTime.Now.AddYears(-35), DateTime.Now.AddYears(-2), false)
+        };
+
+        _employeeStorageContract.Setup(x => x.GetList(
+            It.IsAny<bool>(), It.IsAny<string>(),
+            fromDate, toDate,
+            fromDate, toDate))
+            .Returns(testEmployees);
+
+        // Act
+        var result = _employeeBusinessLogicContract.GetAllEmployees(
+            true, null, fromDate, toDate, fromDate, toDate);
+
+        // Assert
+        Assert.That(result, Is.EquivalentTo(testEmployees));
+        _employeeStorageContract.Verify(x => x.GetList(
+            true, null, fromDate, toDate, fromDate, toDate), Times.Once);
+    }
+
+    [Test]
+    public void GetAllEmployees_ReturnNull_ThrowsException_Test()
+    {
+        // Arrange
+        _employeeStorageContract.Setup(x => x.GetList(
+            It.IsAny<bool>(), It.IsAny<string>(),
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+            It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+            .Returns((List<EmployeeDataModel>)null);
+
+        // Act & Assert
+        Assert.That(() => _employeeBusinessLogicContract.GetAllEmployees(),
+            Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void GetEmployeeById_ValidId_ReturnsEmployee_Test()
+    {
+        // Arrange
+        var employeeId = Guid.NewGuid().ToString();
+        var testEmployee = new EmployeeDataModel(
+            employeeId, "Иванов И.И.", Guid.NewGuid().ToString(),
+            PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false);
+
+        _employeeStorageContract.Setup(x => x.GetElementById(employeeId))
+            .Returns(testEmployee);
+
+        // Act
+        var result = _employeeBusinessLogicContract.GetEmployeeById(employeeId);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(testEmployee));
+        _employeeStorageContract.Verify(x => x.GetElementById(employeeId), Times.Once);
+    }
+
+    [Test]
+    public void GetEmployeeById_InvalidId_ThrowsException_Test()
+    {
+        // Arrange
+        var invalidId = "not-a-guid";
+
+        // Act & Assert
+        Assert.That(() => _employeeBusinessLogicContract.GetEmployeeById(invalidId),
+            Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void GetEmployeeByFIO_ValidFIO_ReturnsEmployee_Test()
+    {
+        // Arrange
+        var fio = "Иванов И.И.";
+        var testEmployee = new EmployeeDataModel(
+            Guid.NewGuid().ToString(), fio, Guid.NewGuid().ToString(),
+            PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false);
+
+        _employeeStorageContract.Setup(x => x.GetElementByFIO(fio))
+            .Returns(testEmployee);
+
+        // Act
+        var result = _employeeBusinessLogicContract.GetEmployeeByFIO(fio);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(testEmployee));
+        _employeeStorageContract.Verify(x => x.GetElementByFIO(fio), Times.Once);
+    }
+
+    [Test]
+    public void InsertEmployee_ValidEmployee_Success_Test()
+    {
+        // Arrange
+        var testEmployee = new EmployeeDataModel(
+            Guid.NewGuid().ToString(), "Иванов И.И.", Guid.NewGuid().ToString(),
+            PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false);
+
+        // Act
+        _employeeBusinessLogicContract.InsertEmployee(testEmployee);
+
+        // Assert
+        _employeeStorageContract.Verify(x => x.AddElement(testEmployee), Times.Once);
+    }
+
+    [Test]
+    public void InsertEmployee_InvalidEmployee_ThrowsException_Test()
+    {
+        // Arrange
+        var invalidEmployee = new EmployeeDataModel(
+            "invalid-id", "Иванов", "invalid-post",
+            PositionType.None, DateTime.Now, DateTime.Now, false);
+
+        // Act & Assert
+        Assert.That(() => _employeeBusinessLogicContract.InsertEmployee(invalidEmployee),
+            Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void UpdateEmployee_ValidEmployee_Success_Test()
+    {
+        // Arrange
+        var testEmployee = new EmployeeDataModel(
+            Guid.NewGuid().ToString(), "Иванов И.И.", Guid.NewGuid().ToString(),
+            PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false);
+
+        _employeeStorageContract.Setup(x => x.GetElementById(testEmployee.Id))
+            .Returns(testEmployee);
+
+        // Act
+        _employeeBusinessLogicContract.UpdateEmployee(testEmployee);
+
+        // Assert
+        _employeeStorageContract.Verify(x => x.UpdElement(testEmployee), Times.Once);
+    }
+
+    [Test]
+    public void DeleteEmployee_ValidId_Success_Test()
+    {
+        // Arrange
+        var employeeId = Guid.NewGuid().ToString();
+        var testEmployee = new EmployeeDataModel(
+            employeeId, "Иванов И.И.", Guid.NewGuid().ToString(),
+            PositionType.Manager, DateTime.Now.AddYears(-30), DateTime.Now.AddYears(-5), false);
+
+        _employeeStorageContract.Setup(x => x.GetElementById(employeeId))
+            .Returns(testEmployee);
+
+        // Act
+        _employeeBusinessLogicContract.DeleteEmployee(employeeId);
+
+        // Assert
+        _employeeStorageContract.Verify(x => x.DelElement(employeeId), Times.Once);
+    }
+
+    [Test]
+    public void DeleteEmployee_InvalidId_ThrowsException_Test()
+    {
+        // Arrange
+        var invalidId = "not-a-guid";
+
+        // Act & Assert
+        Assert.That(() => _employeeBusinessLogicContract.DeleteEmployee(invalidId),
+            Throws.TypeOf<ValidationException>());
+    }
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/OrderBusinessLogicContractTests.cs

@@ -0,0 +1,179 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StorageContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests
+{
+    [TestFixture]
+    internal class OrderBusinessLogicContractTests
+    {
+        private OrderBusinessLogicContract _orderBusinessLogic;
+        private Mock<IOrderStorageContracts> _orderStorageMock;
+        private Mock<ILogger<OrderBusinessLogicContract>> _loggerMock;
+
+        [OneTimeSetUp]
+        public void OneTimeSetUp()
+        {
+            _orderStorageMock = new Mock<IOrderStorageContracts>();
+            _loggerMock = new Mock<ILogger<OrderBusinessLogicContract>>();
+            _orderBusinessLogic = new OrderBusinessLogicContract(
+                _orderStorageMock.Object,
+                _loggerMock.Object);
+        }
+
+        [SetUp]
+        public void SetUp()
+        {
+            _orderStorageMock.Reset();
+            _loggerMock.Reset();
+        }
+
+        [Test]
+        public void GetAllOrders_ReturnListOfRecords_Test()
+        {
+            // Arrange
+            var testOrders = new List<OrderDataModels>
+            {
+                new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+                    new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) }),
+                new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+                    new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 2) })
+            };
+
+            _orderStorageMock.Setup(x => x.GetList(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+                .Returns(testOrders);
+
+            // Act
+            var result = _orderBusinessLogic.GetAllOrders();
+
+            // Assert
+            Assert.Multiple(() =>
+            {
+                Assert.That(result, Is.Not.Null);
+                Assert.That(result, Is.EquivalentTo(testOrders));
+            });
+            _orderStorageMock.Verify(x => x.GetList(null, null, null), Times.Once);
+        }
+
+        [Test]
+        public void GetAllOrders_WithClientFilter_Test()
+        {
+            // Arrange
+            var clientId = Guid.NewGuid().ToString();
+            var testOrders = new List<OrderDataModels>
+            {
+                new(Guid.NewGuid().ToString(), clientId, Guid.NewGuid().ToString(),
+                    new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) })
+            };
+
+            _orderStorageMock.Setup(x => x.GetList(clientId, It.IsAny<string>(), It.IsAny<string>()))
+                .Returns(testOrders);
+
+            // Act
+            var result = _orderBusinessLogic.GetAllOrders(clientId: clientId);
+
+            // Assert
+            Assert.That(result, Is.EquivalentTo(testOrders));
+            _orderStorageMock.Verify(x => x.GetList(clientId, null, null), Times.Once);
+        }
+
+        [Test]
+        public void GetAllOrders_InvalidClientId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _orderBusinessLogic.GetAllOrders(clientId: "invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void GetOrderById_ValidId_ReturnsOrder_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var testOrder = new OrderDataModels(
+                orderId,
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) });
+
+            _orderStorageMock.Setup(x => x.GetElementById(orderId))
+                .Returns(testOrder);
+
+            // Act
+            var result = _orderBusinessLogic.GetOrderById(orderId);
+
+            // Assert
+            Assert.That(result, Is.EqualTo(testOrder));
+        }
+
+        [Test]
+        public void GetOrderById_InvalidId_ThrowException_Test()
+        {
+            // Act & Assert
+            Assert.That(() => _orderBusinessLogic.GetOrderById("invalid-guid"),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void InsertOrder_ValidData_Success_Test()
+        {
+            // Arrange
+            var testOrder = new OrderDataModels(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) });
+
+            // Act
+            _orderBusinessLogic.InsertOrder(testOrder);
+
+            // Assert
+            _orderStorageMock.Verify(x => x.AddElement(testOrder), Times.Once);
+        }
+
+        [Test]
+        public void InsertOrder_DuplicateId_ThrowException_Test()
+        {
+            // Arrange
+            var testOrder = new OrderDataModels(
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) });
+
+            _orderStorageMock.Setup(x => x.GetElementById(testOrder.Id))
+                .Returns(testOrder);
+
+            // Act & Assert
+            Assert.That(() => _orderBusinessLogic.InsertOrder(testOrder),
+                Throws.TypeOf<ValidationException>());
+        }
+
+        [Test]
+        public void DeleteOrder_ValidId_Success_Test()
+        {
+            // Arrange
+            var orderId = Guid.NewGuid().ToString();
+            var testOrder = new OrderDataModels(
+                orderId,
+                Guid.NewGuid().ToString(),
+                Guid.NewGuid().ToString(),
+                new List<Dish_OrderDataModel> { new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1) });
+
+            _orderStorageMock.Setup(x => x.GetElementById(orderId))
+                .Returns(testOrder);
+
+            // Act
+            _orderBusinessLogic.DeleteOrder(orderId);
+
+            // Assert
+            _orderStorageMock.Verify(x => x.DelElement(orderId), Times.Once);
+        }
+    }
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/PositionBusinessLogicsContractsTests.cs

@@ -0,0 +1,322 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Enums;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class PositionBusinessLogicsContractsTests
+{
+    private PositionBusinessLogicContract _positionBusinessLogicContract;
+    private Mock<IPositionStorageContract> _positionStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _positionStorageContract = new Mock<IPositionStorageContract>();
+        _positionBusinessLogicContract = new PositionBusinessLogicContract(
+            _positionStorageContract.Object,
+            new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _positionStorageContract.Reset();
+    }
+
+    //[Test]
+    //public void GetAllPositions_ReturnListOfRecords_Test()
+    //{
+    //    // Arrange
+    //    var listOriginal = new List<PositionDataModel>()
+    //    {
+    //        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "Position 1", PositionType.Manager, 1000, true, DateTime.UtcNow),
+    //        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "Position 2", PositionType.Staff, 800, false, DateTime.UtcNow)
+    //    };
+
+    //    _positionStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+
+    //    // Act
+    //    var resultActive = _positionBusinessLogicContract.GetAllPositions(true);
+    //    var resultAll = _positionBusinessLogicContract.GetAllPositions(false);
+
+    //    // Assert
+    //    Assert.Multiple(() =>
+    //    {
+    //        Assert.That(resultActive, Is.Not.Null);
+    //        Assert.That(resultAll, Is.Not.Null);
+    //        Assert.That(resultActive, Is.EquivalentTo(listOriginal));
+    //        Assert.That(resultAll, Is.EquivalentTo(listOriginal));
+    //    });
+    //    _positionStorageContract.Verify(x => x.GetList(true), Times.Once);
+    //    _positionStorageContract.Verify(x => x.GetList(false), Times.Once);
+    //}
+
+    //[Test]
+    //public void GetAllPositions_ReturnEmptyList_Test()
+    //{
+    //    // Arrange
+    //    _positionStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns([]);
+
+    //    // Act
+    //    var result = _positionBusinessLogicContract.GetAllPositions(true);
+    //    var listAll = _positionBusinessLogicContract.GetAllPositions(false);
+
+    //    // Assert
+    //    Assert.Multiple(() =>
+    //    {
+    //        Assert.That(result, Is.Not.Null);
+    //        Assert.That(listAll, Is.Not.Null);
+    //        Assert.That(result, Has.Count.EqualTo(0));
+    //        Assert.That(listAll, Has.Count.EqualTo(0));
+    //    });
+    //    _positionStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Exactly(2));
+    //}
+
+    //[Test]
+    //public void GetAllPositions_ReturnNull_ThrowException_Test()
+    //{
+    //    // Arrange
+    //    _positionStorageContract.Setup(x => x.GetList(It.IsAny<bool>())).Returns(null as List<PositionDataModel>);
+
+    //    // Act & Assert
+    //    Assert.That(() => _positionBusinessLogicContract.GetAllPositions(true),
+    //        Throws.TypeOf<NullListException>());
+    //    _positionStorageContract.Verify(x => x.GetList(It.IsAny<bool>()), Times.Once);
+    //}
+
+    [Test]
+    public void GetAllDataOfPosition_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var positionId = Guid.NewGuid().ToString();
+        var record = new PositionDataModel(Guid.NewGuid().ToString(), positionId, "Position", PositionType.Manager, 1000, true, DateTime.UtcNow);
+
+        _positionStorageContract.Setup(x => x.GetElementById(positionId)).Returns(record);
+
+        // Act
+        var result = _positionBusinessLogicContract.GetAllDataOfPosition(positionId);
+
+        // Assert
+        Assert.That(result, Is.Not.Null);
+        Assert.That(result, Has.Count.EqualTo(1));
+        Assert.That(result[0], Is.EqualTo(record));
+        _positionStorageContract.Verify(x => x.GetElementById(positionId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllDataOfPosition_PositionIdIsNullOrEmpty_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.GetAllDataOfPosition(null),
+            Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _positionBusinessLogicContract.GetAllDataOfPosition(string.Empty),
+            Throws.TypeOf<ArgumentNullException>());
+        _positionStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllDataOfPosition_PositionIdIsNotGuid_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.GetAllDataOfPosition("not-a-guid"),
+            Throws.TypeOf<ValidationException>());
+        _positionStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetPositionByData_GetById_ReturnRecord_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new PositionDataModel(id, Guid.NewGuid().ToString(), "Position", PositionType.Manager, 1000, true, DateTime.UtcNow);
+
+        _positionStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+
+        // Act
+        var result = _positionBusinessLogicContract.GetPositionByData(id);
+
+        // Assert
+        Assert.That(result, Is.Not.Null);
+        Assert.That(result.Id, Is.EqualTo(id));
+        _positionStorageContract.Verify(x => x.GetElementById(id), Times.Once);
+    }
+
+    [Test]
+    public void GetPositionByData_GetByName_ReturnRecord_Test()
+    {
+        // Arrange
+        var name = "Position Name";
+        var record = new PositionDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), name, PositionType.Manager, 1000, true, DateTime.UtcNow);
+
+        _positionStorageContract.Setup(x => x.GetElementByName(name)).Returns(record);
+
+        // Act
+        var result = _positionBusinessLogicContract.GetPositionByData(name);
+
+        // Assert
+        Assert.That(result, Is.Not.Null);
+        Assert.That(result.PositionName, Is.EqualTo(name));
+        _positionStorageContract.Verify(x => x.GetElementByName(name), Times.Once);
+    }
+
+    [Test]
+    public void GetPositionByData_EmptyData_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.GetPositionByData(null),
+            Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _positionBusinessLogicContract.GetPositionByData(string.Empty),
+            Throws.TypeOf<ArgumentNullException>());
+        _positionStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _positionStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetPositionByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.GetPositionByData(Guid.NewGuid().ToString()),
+            Throws.TypeOf<ElementNotFoundException>());
+        _positionStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+        _positionStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetPositionByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.GetPositionByData("Position Name"),
+            Throws.TypeOf<ElementNotFoundException>());
+        _positionStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _positionStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertPosition_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new PositionDataModel(
+            Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(),
+            "Position",
+            PositionType.Manager,
+            1000,
+            true,
+            DateTime.UtcNow);
+
+        // Act
+        _positionBusinessLogicContract.InsertPosition(record);
+
+        // Assert
+        _positionStorageContract.Verify(x => x.AddElement(record), Times.Once);
+    }
+
+    [Test]
+    public void InsertPosition_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.InsertPosition(null),
+            Throws.TypeOf<ArgumentNullException>());
+        _positionStorageContract.Verify(x => x.AddElement(It.IsAny<PositionDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertPosition_InvalidRecord_ThrowException_Test()
+    {
+        // Arrange
+        var invalidRecord = new PositionDataModel(
+            "invalid-id",
+            "invalid-id",
+            "",
+            PositionType.None,
+            0,
+            true,
+            DateTime.UtcNow);
+
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.InsertPosition(invalidRecord),
+            Throws.TypeOf<ValidationException>());
+        _positionStorageContract.Verify(x => x.AddElement(It.IsAny<PositionDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdatePosition_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new PositionDataModel(
+            Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(),
+            "Position",
+            PositionType.Manager,
+            1000,
+            true,
+            DateTime.UtcNow);
+
+        // Act
+        _positionBusinessLogicContract.UpdatePosition(record);
+
+        // Assert
+        _positionStorageContract.Verify(x => x.UpdElement(record), Times.Once);
+    }
+
+    [Test]
+    public void UpdatePosition_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.UpdatePosition(null),
+            Throws.TypeOf<ArgumentNullException>());
+        _positionStorageContract.Verify(x => x.UpdElement(It.IsAny<PositionDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void DeletePosition_CorrectId_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+
+        // Act
+        _positionBusinessLogicContract.DeletePosition(id);
+
+        // Assert
+        _positionStorageContract.Verify(x => x.DelElement(id), Times.Once);
+    }
+
+    [Test]
+    public void DeletePosition_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.DeletePosition(null),
+            Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _positionBusinessLogicContract.DeletePosition(string.Empty),
+            Throws.TypeOf<ArgumentNullException>());
+        _positionStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeletePosition_IdIsNotGuid_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _positionBusinessLogicContract.DeletePosition("not-a-guid"),
+            Throws.TypeOf<ValidationException>());
+        _positionStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void RestorePosition_CorrectId_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+
+        // Act
+        _positionBusinessLogicContract.RestorePosition(id);
+
+        // Assert
+        _positionStorageContract.Verify(x => x.ResElement(id), Times.Once);
+    }
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/SalaryBusinessLogicsContractsTests.cs

@@ -0,0 +1,144 @@
+using AndDietCokeContracts.BusinessLogicsContracts;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.Extensions;
+using AndDietCokeContracts.StorageContract;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class SalaryBusinessLogicsContractsTests
+{
+    private SalaryBusinessLogicContract _salaryBusinessLogicContract;
+    private Mock<ISalaryStorageContract> _salaryStorageContract;
+    private Mock<ILogger> _logger;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _salaryStorageContract = new Mock<ISalaryStorageContract>();
+        _logger = new Mock<ILogger>();
+        _salaryBusinessLogicContract = new SalaryBusinessLogicContract(
+            _salaryStorageContract.Object,
+            _logger.Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract.Reset();
+        _logger.Reset();
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriod_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 1000, Guid.NewGuid().ToString()),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1), 1500, Guid.NewGuid().ToString()),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(-1), 800, Guid.NewGuid().ToString()),
+        };
+
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), null))
+            .Returns(listOriginal);
+
+        // Act
+        var result = _salaryBusinessLogicContract.GetAllSalariesByPeriod(startDate, endDate);
+
+        // Assert
+        Assert.That(result, Is.Not.Null);
+        Assert.That(result, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate, null), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        // Arrange
+        var dateTime = DateTime.UtcNow;
+
+        // Act & Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime, dateTime),
+            Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime, dateTime.AddSeconds(-1)),
+            Throws.TypeOf<IncorrectDatesException>());
+
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriod_ReturnNull_ThrowException_Test()
+    {
+        // Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), null))
+            .Returns((List<SalaryDataModel>)null);
+
+        // Act & Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+            Throws.TypeOf<NullListException>());
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), null))
+            .Throws(new StorageException(new InvalidOperationException()));
+
+        // Act & Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+            Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriodByEmployee_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var employeeId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 1000, employeeId),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1), 1500, employeeId),
+        };
+
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), employeeId))
+            .Returns(listOriginal);
+
+        // Act
+        var result = _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(startDate, endDate, employeeId);
+
+        // Assert
+        Assert.That(result, Is.Not.Null);
+        Assert.That(result, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate, employeeId), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriodByEmployee_EmployeeIdIsNullOrEmpty_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), null),
+            Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), string.Empty),
+            Throws.TypeOf<ArgumentNullException>());
+
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(), It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetAllSalariesByPeriodByEmployee_EmployeeIdIsNotGuid_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _salaryBusinessLogicContract.GetAllSalariesByPeriodByEmployee(DateTime.UtcNow, DateTime.UtcNow.AddDays(1), "invalid-id"),
+            Throws.TypeOf<ValidationException>());
+    }
+
+}

AndDietCokeProject/AndDietCokeTests/BusinessLogicsContractsTests/СlientBusinessLogicsContractsTests.cs

@@ -0,0 +1,289 @@
+using AndDietCokeBusinessLogic.Implementations;
+using AndDietCokeContracts.DataModels;
+using AndDietCokeContracts.Exceptions;
+using AndDietCokeContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace AndDietCokeTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class СlientBusinessLogicsContractsTests
+{
+    private ClientBusinessLogicContract _clientLogicContract;
+    private Mock<IClientStorageContract> _clientStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _clientStorageContract = new Mock<IClientStorageContract>();
+        _clientLogicContract = new ClientBusinessLogicContract(
+            _clientStorageContract.Object,
+            new Mock<ILogger>().Object);
+    }
+
+    [SetUp]
+    public void SetUp()
+    {
+        _clientStorageContract.Reset();
+    }
+
+    // GetAllClients tests
+    [Test]
+    public void GetAllClients_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var listOriginal = new List<СlientDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "Client 1", "+7-111-111-11-11", 0),
+            new(Guid.NewGuid().ToString(), "Client 2", "+7-222-222-22-22", 5),
+        };
+
+        _clientStorageContract.Setup(x => x.GetList()).Returns(listOriginal);
+
+        // Act
+        var list = _clientLogicContract.GetAllClients();
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _clientStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllClients_ReturnEmptyList_Test()
+    {
+        // Arrange
+        _clientStorageContract.Setup(x => x.GetList()).Returns([]);
+
+        // Act
+        var list = _clientLogicContract.GetAllClients();
+
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _clientStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllClients_ReturnNull_ThrowException_Test()
+    {
+        // Arrange
+        _clientStorageContract.Setup(x => x.GetList()).Returns(null as List<СlientDataModel>);
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.GetAllClients(),
+            Throws.TypeOf<NullListException>());
+        _clientStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllClients_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _clientStorageContract.Setup(x => x.GetList())
+            .Throws(new StorageException(new InvalidOperationException()));
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.GetAllClients(),
+            Throws.TypeOf<StorageException>());
+        _clientStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    // GetClientByData tests
+    [Test]
+    public void GetClientByData_GetById_ReturnRecord_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new СlientDataModel(id, "Client", "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+
+        // Act
+        var element = _clientLogicContract.GetClientByData(id);
+
+        // Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _clientStorageContract.Verify(x => x.GetElementById(id), Times.Once);
+        _clientStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+        _clientStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetClientByData_GetByFio_ReturnRecord_Test()
+    {
+        // Arrange
+        var fio = "Client Name";
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), fio, "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.GetElementByFIO(fio)).Returns(record);
+
+        // Act
+        var element = _clientLogicContract.GetClientByData(fio);
+
+        // Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.FIO, Is.EqualTo(fio));
+        _clientStorageContract.Verify(x => x.GetElementByFIO(fio), Times.Once);
+        _clientStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _clientStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetClientByData_GetByPhoneNumber_ReturnRecord_Test()
+    {
+        // Arrange
+        var phone = "+7-111-111-11-11";
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), "Client", phone, 0);
+        _clientStorageContract.Setup(x => x.GetElementByPhoneNumber(phone)).Returns(record);
+
+        // Act
+        var element = _clientLogicContract.GetClientByData(phone);
+
+        // Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Contact, Is.EqualTo(phone));
+        _clientStorageContract.Verify(x => x.GetElementByPhoneNumber(phone), Times.Once);
+        _clientStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _clientStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetClientByData_EmptyData_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.GetClientByData(null),
+            Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _clientLogicContract.GetClientByData(string.Empty),
+            Throws.TypeOf<ArgumentNullException>());
+        _clientStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+        _clientStorageContract.Verify(x => x.GetElementByPhoneNumber(It.IsAny<string>()), Times.Never);
+        _clientStorageContract.Verify(x => x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetClientByData_NotFound_ThrowException_Test()
+    {
+        // Arrange
+        var testData = Guid.NewGuid().ToString();
+        _clientStorageContract.Setup(x => x.GetElementById(testData)).Returns(null as СlientDataModel);
+        _clientStorageContract.Setup(x => x.GetElementByFIO(testData)).Returns(null as СlientDataModel);
+        _clientStorageContract.Setup(x => x.GetElementByPhoneNumber(testData)).Returns(null as СlientDataModel);
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.GetClientByData(testData),
+            Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    // InsertClient tests
+    [Test]
+    public void InsertClient_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), "Client", "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.AddElement(It.IsAny<СlientDataModel>()));
+
+        // Act
+        _clientLogicContract.InsertClient(record);
+
+        // Assert
+        _clientStorageContract.Verify(x => x.AddElement(record), Times.Once);
+    }
+
+    [Test]
+    public void InsertClient_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.InsertClient(null),
+            Throws.TypeOf<ArgumentNullException>());
+        _clientStorageContract.Verify(x => x.AddElement(It.IsAny<СlientDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertClient_InvalidRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.InsertClient(
+            new СlientDataModel("invalid-id", "Client", "invalid-phone", 0)),
+            Throws.TypeOf<ValidationException>());
+        _clientStorageContract.Verify(x => x.AddElement(It.IsAny<СlientDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertClient_DuplicateData_ThrowException_Test()
+    {
+        // Arrange
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), "Client", "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.AddElement(record))
+            .Throws(new ElementExistsException("Client", "already exists"));
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.InsertClient(record),
+            Throws.TypeOf<ElementExistsException>());
+    }
+
+    // UpdateClient tests
+    [Test]
+    public void UpdateClient_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), "Client", "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.UpdElement(It.IsAny<СlientDataModel>()));
+
+        // Act
+        _clientLogicContract.UpdateClient(record);
+
+        // Assert
+        _clientStorageContract.Verify(x => x.UpdElement(record), Times.Once);
+    }
+
+    [Test]
+    public void UpdateClient_NotFound_ThrowException_Test()
+    {
+        // Arrange
+        var record = new СlientDataModel(Guid.NewGuid().ToString(), "Client", "+7-111-111-11-11", 0);
+        _clientStorageContract.Setup(x => x.UpdElement(record))
+            .Throws(new ElementNotFoundException("Client not found"));
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.UpdateClient(record),
+            Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    // DeleteClient tests
+    [Test]
+    public void DeleteClient_CorrectId_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        _clientStorageContract.Setup(x => x.DelElement(id));
+
+        // Act
+        _clientLogicContract.DeleteClient(id);
+
+        // Assert
+        _clientStorageContract.Verify(x => x.DelElement(id), Times.Once);
+    }
+
+    [Test]
+    public void DeleteClient_NotFound_ThrowException_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        _clientStorageContract.Setup(x => x.DelElement(id))
+            .Throws(new ElementNotFoundException("Client not found"));
+
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.DeleteClient(id),
+            Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void DeleteClient_InvalidId_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _clientLogicContract.DeleteClient("not-a-guid"),
+            Throws.TypeOf<ValidationException>());
+        _clientStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+}

AndDietCokeProject/AndDietCokeTests/DataModelsTests/PositionDataModelTests.cs

@@ -96,7 +96,7 @@ namespace AndDietCokeTests.DataModelsTests
             });
         }
 
-        private static PositionDataModell CreateDataModel(string? id, string? positionId, string? positionName, PositionType positionType, double salary, bool isActual, DateTime changeDate) =>
+        private static PositionDataModel CreateDataModel(string? id, string? positionId, string? positionName, PositionType positionType, double salary, bool isActual, DateTime changeDate) =>
             new(id, positionId, positionName, positionType, salary, isActual, changeDate);
     }
 }