правки

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/AgencyBusinessLogicContract.cs

@@ -0,0 +1,74 @@
+using MagicCarpetContracts.BusinessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class AgencyBusinessLogicContract(IAgencyStorageContract agencyStorageContract, ILogger logger) : IAgencyBusinessLogicContract
+{
+    private readonly IAgencyStorageContract _agencyStorageContract = agencyStorageContract;
+    private readonly ILogger _logger = logger;
+    public List<AgencyDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _agencyStorageContract.GetList() ?? throw new NullListException();
+
+        return [];
+    }
+
+    public AgencyDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _agencyStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+        return new("", TourType.None, 0, []);
+    }
+
+    public void InsertComponent(AgencyDataModel agencyDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(agencyDataModel));
+        ArgumentNullException.ThrowIfNull(agencyDataModel);
+        agencyDataModel.Validate();
+        _agencyStorageContract.AddElement(agencyDataModel);
+    }
+
+    public void UpdateComponent(AgencyDataModel agencyDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(agencyDataModel));
+        ArgumentNullException.ThrowIfNull(agencyDataModel);
+        agencyDataModel.Validate();
+        _agencyStorageContract.UpdElement(agencyDataModel);
+    }
+
+    public void DeleteComponent(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");
+        }
+        _agencyStorageContract.DelElement(id);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/SaleBusinessLogicContract.cs

@@ -13,10 +13,11 @@ using System.Threading.Tasks;
 
 namespace MagicCarpetBusinessLogic.Implementations;
 
-internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract, ILogger logger) : ISaleBusinessLogicContract
+internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContract, IAgencyStorageContract agencyStorageContract, ILogger logger) : ISaleBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
     private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
+    private readonly IAgencyStorageContract _agencyStorageContract = agencyStorageContract;
 
     public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
     {
@@ -101,6 +102,10 @@ internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContrac
         _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(saleDataModel));
         ArgumentNullException.ThrowIfNull(saleDataModel);
         saleDataModel.Validate();
+        if (!_agencyStorageContract.CheckComponents(saleDataModel))
+        {
+            throw new InsufficientException("Dont have tour in agency");
+        }
         _saleStorageContract.AddElement(saleDataModel);
     }
 

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/SuppliesBusinessLogicContract.cs

@@ -0,0 +1,61 @@
+using MagicCarpetContracts.BusinessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace MagicCarpetBusinessLogic.Implementations;
+
+public class SuppliesBusinessLogicContract(ISuppliesStorageContract suppliesStorageContract, ILogger logger) : ISuppliesBusinessLogicContract
+{
+    private readonly ISuppliesStorageContract _suppliesStorageContract = suppliesStorageContract;
+    private readonly ILogger _logger = logger;
+
+    public List<SuppliesDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _suppliesStorageContract.GetList() ?? throw new NullListException();
+
+        return [];
+    }
+
+    public SuppliesDataModel GetComponentByData(string data)
+    {
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ElementNotFoundException(data);
+        }
+        return _suppliesStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+
+        return new("", TourType.None, DateTime.UtcNow, 0, []);
+    }
+
+    public void InsertComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.AddElement(suppliesDataModel);
+    }
+
+    public void UpdateComponent(SuppliesDataModel suppliesDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(suppliesDataModel));
+        ArgumentNullException.ThrowIfNull(suppliesDataModel);
+        suppliesDataModel.Validate();
+        _suppliesStorageContract.UpdElement(suppliesDataModel);
+    }
+}

MagicCarpetProject/MagicCarpetBusinessLogic/Implementations/TourBusinessLogicContract.cs

@@ -56,7 +56,6 @@ internal class TourBusinessLogicContract(ITourStorageContract tourStorageContrac
         _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(tourDataModel));
         ArgumentNullException.ThrowIfNull(tourDataModel);
         tourDataModel.Validate();
-        _tourStorageContract.AddElement(tourDataModel);
     }
 
     public void UpdateTour(TourDataModel tourDataModel)
@@ -64,7 +63,6 @@ internal class TourBusinessLogicContract(ITourStorageContract tourStorageContrac
         _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(tourDataModel));
         ArgumentNullException.ThrowIfNull(tourDataModel);
         tourDataModel.Validate();
-        _tourStorageContract.UpdElement(tourDataModel);
     }
 
     public void DeleteTour(string id)

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/IAgencyBusinessLogicContract.cs

@@ -0,0 +1,17 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BusinessLogicContracts;
+
+public interface IAgencyBusinessLogicContract
+{
+    List<AgencyDataModel> GetAllComponents();
+    AgencyDataModel GetComponentByData(string data);
+    void InsertComponent(AgencyDataModel agencyDataModel);
+    void UpdateComponent(AgencyDataModel agencyDataModel);
+    void DeleteComponent(string id);
+}

MagicCarpetProject/MagicCarpetContracts/BusinessLogicContracts/ISuppliesBusinessLogicContract.cs

@@ -0,0 +1,16 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.BusinessLogicContracts;
+
+public interface ISuppliesBusinessLogicContract
+{
+    List<SuppliesDataModel> GetAllComponents();
+    SuppliesDataModel GetComponentByData(string data);
+    void InsertComponent(SuppliesDataModel componentDataModel);
+    void UpdateComponent(SuppliesDataModel componentDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/AgencyDataModel.cs

@@ -0,0 +1,33 @@
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class AgencyDataModel(string id, TourType tourType, int count, List<TourAgencyDataModel> tours) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public TourType Type { get; private set; } = tourType;
+    public int Count { get; private set; } = count;
+    public List<TourAgencyDataModel> Tours { get; private set; } = tours;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (Type == TourType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Tours?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include tours");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/SaleDataModel.cs

@@ -11,7 +11,7 @@ using System.Threading.Tasks;
 namespace MagicCarpetContracts.DataModels;
 
 public class SaleDataModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType,
-    double discount, bool isCancel, List<SaleTourDataModel> tours) : IValidation
+    double discount, bool isCancel, List<SaleTourDataModel> saleTours) : IValidation
 {
     public string Id { get; private set; } = id;
 
@@ -28,7 +28,7 @@ public class SaleDataModel(string id, string employeeId, string? clientId, doubl
 
     public bool IsCancel { get; private set; } = isCancel;
 
-    public List<SaleTourDataModel> Tours { get; private set; } = tours;
+    public List<SaleTourDataModel> Tours { get; private set; } = saleTours;
 
     public void Validate()
     {

MagicCarpetProject/MagicCarpetContracts/DataModels/SaleTourDataModel.cs

@@ -9,11 +9,11 @@ using System.Threading.Tasks;
 
 namespace MagicCarpetContracts.DataModels;
 
-public class SaleTourDataModel(string saleId, string cocktailId, int count) : IValidation
+public class SaleTourDataModel(string saleId, string tourId, int count) : IValidation
 {
     public string SaleId { get; private set; } = saleId;
 
-    public string TourId { get; private set; } = cocktailId;
+    public string TourId { get; private set; } = tourId;
 
     public int Count { get; private set; } = count;
 

MagicCarpetProject/MagicCarpetContracts/DataModels/SuppliesDataModel.cs

@@ -0,0 +1,35 @@
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class SuppliesDataModel(string id, TourType tourType, DateTime date, int count, List<TourSuppliesDataModel> tours) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public TourType Type { get; private set; } = tourType;
+    public DateTime ProductuionDate { get; private set; } = date;
+    public int Count { get; private set; } = count;
+    public List<TourSuppliesDataModel> Tours { get; private set; } = tours;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        if (Type == TourType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Tours?.Count ?? 0) == 0)
+            throw new ValidationException("The sale must include tours");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/TourAgencyDataModel.cs

@@ -0,0 +1,32 @@
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class TourAgencyDataModel(string agencyId, string tourId, int count) : IValidation
+{
+    public string AgencyId { get; private set; } = agencyId;
+    public string TourId { get; private set; } = tourId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (AgencyId.IsEmpty())
+            throw new ValidationException("Field AgencyId is empty");
+        if (!AgencyId.IsGuid())
+            throw new ValidationException("The value in the field AgencyId is not a unique identifier");
+        if (TourId.IsEmpty())
+            throw new ValidationException("Field TourId is empty");
+        if (!TourId.IsGuid())
+            throw new ValidationException("The value in the field TourId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/DataModels/TourDataModel.cs

@@ -18,7 +18,7 @@ public class TourDataModel(string id, string tourName, string tourCountry, doubl
     public string TourName { get; private set; } = tourName;
     public string TourCountry { get; private set; } = tourCountry;
     public double Price { get; private set; } = price;
-    public TourType Type { get; private set; } = tourType;
+    public TourType TourType { get; private set; } = tourType;
 
     public void Validate()
     {
@@ -32,7 +32,7 @@ public class TourDataModel(string id, string tourName, string tourCountry, doubl
             throw new ValidationException("Field TourCountry is empty");
         if (Price <= 0)
             throw new ValidationException("Field Price is less than or equal to 0");
-        if (Type == TourType.None)
+        if (TourType == TourType.None)
             throw new ValidationException("Field Type is empty");
     }
 }

MagicCarpetProject/MagicCarpetContracts/DataModels/TourSuppliesDataModel.cs

@@ -0,0 +1,32 @@
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.Extensions;
+using MagicCarpetContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.DataModels;
+
+public class TourSuppliesDataModel(string suppliesId, string tourId, int count) : IValidation
+{
+    public string SuppliesId { get; private set; } = suppliesId;
+    public string TourId { get; private set; } = tourId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (SuppliesId.IsEmpty())
+            throw new ValidationException("Field SuppliesId is empty");
+        if (!SuppliesId.IsGuid())
+            throw new ValidationException("The value in the field SuppliesId is not a unique identifier");
+        if (TourId.IsEmpty())
+            throw new ValidationException("Field TourId is empty");
+        if (!TourId.IsGuid())
+            throw new ValidationException("The value in the field BlandId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Exceptions;
+
+public class ElementDeletedException : Exception
+{
+    public ElementDeletedException(string id) : base($"Cannot modify a deleted item (id: {id})") { }
+}

MagicCarpetProject/MagicCarpetContracts/Exceptions/InsufficientException.cs

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

MagicCarpetProject/MagicCarpetContracts/Infrastructure/IConfigurationDatabase.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.Infrastructure;
+
+public interface IConfigurationDatabase
+{
+    string ConnectionString { get; }
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/IAgencyStorageContract.cs

@@ -0,0 +1,18 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface IAgencyStorageContract
+{
+    List<AgencyDataModel> GetList();
+    AgencyDataModel GetElementById(string id);
+    void AddElement(AgencyDataModel agencyDataModel);
+    void UpdElement(AgencyDataModel agencyDataModel);
+    void DelElement(string id);
+    bool CheckComponents(SaleDataModel saleDataModel);
+}

MagicCarpetProject/MagicCarpetContracts/StoragesContracts/ISuppliesStorageContract.cs

@@ -0,0 +1,16 @@
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetContracts.StoragesContracts;
+
+public interface ISuppliesStorageContract
+{
+    List<SuppliesDataModel> GetList(DateTime? startDate = null);
+    SuppliesDataModel GetElementById(string id);
+    void AddElement(SuppliesDataModel suppliesDataModel);
+    void UpdElement(SuppliesDataModel suppliesDataModel);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/AgencyStorageContract.cs

@@ -0,0 +1,148 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class AgencyStorageContract : IAgencyStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public AgencyStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Agency, AgencyDataModel>()
+       .ConstructUsing(src => new AgencyDataModel(
+           src.Id,
+           src.Type,
+           src.Count,
+           _mapper.Map<List<TourAgencyDataModel>>(src.Tours)
+       ));
+
+            cfg.CreateMap<AgencyDataModel, Agency>();
+            cfg.CreateMap<TourAgencyDataModel, TourAgency>().ReverseMap();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<AgencyDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Agencies.Select(x => _mapper.Map<AgencyDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public AgencyDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<AgencyDataModel>(GetAgencyById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(AgencyDataModel agencyDataModel)
+    {
+        try
+        {
+            _dbContext.Agencies.Add(_mapper.Map<Agency>(agencyDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(AgencyDataModel agencyDataModel)
+    {
+        try
+        {
+            var element = GetAgencyById(agencyDataModel.Id) ?? throw new ElementNotFoundException(agencyDataModel.Id);
+            _dbContext.Agencies.Update(_mapper.Map(agencyDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetAgencyById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Agencies.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public bool CheckComponents(SaleDataModel saleDataModel)
+    {
+        using (var transaction = _dbContext.Database.BeginTransaction())
+        {
+            foreach (SaleTourDataModel sale_tour in saleDataModel.Tours)
+            {
+                var tour = _dbContext.Tours.FirstOrDefault(x => x.Id == sale_tour.TourId);
+                var agency = _dbContext.Agencies.FirstOrDefault(x => x.Type == tour.TourType && x.Count >= sale_tour.Count);
+
+                if (agency == null)
+                {
+                    transaction.Rollback();
+                    return false;
+                }
+                if (agency.Count - sale_tour.Count == 0)
+                {
+                    DelElement(agency.Id);
+                }
+                else
+                {
+                    agency.Count -= sale_tour.Count;
+                }
+            }
+            transaction.Commit();
+            _dbContext.SaveChanges();
+            return true;
+        }
+    }
+
+    private Agency? GetAgencyById(string id) => _dbContext.Agencies.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/ClientStorageContarct.cs

@@ -0,0 +1,144 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class ClientStorageContarct : IClientStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+    public ClientStorageContarct(MagicCarpetDbContext magicCarpetDbContext)
+    {
+        _dbContext = magicCarpetDbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(MagicCarpetDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<ClientDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Clients.Select(x => _mapper.Map<ClientDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(GetClientById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public ClientDataModel? GetElementByPhoneNumber(string phoneNumber)
+    {
+        try
+        {
+            return _mapper.Map<ClientDataModel>(_dbContext.Clients.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void AddElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            _dbContext.Clients.Add(_mapper.Map<Client>(clientDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", clientDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void UpdElement(ClientDataModel clientDataModel)
+    {
+        try
+        {
+            var element = GetClientById(clientDataModel.Id) ?? throw new ElementNotFoundException(clientDataModel.Id);
+            _dbContext.Clients.Update(_mapper.Map(clientDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Clients_PhoneNumber" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PhoneNumber", clientDataModel.PhoneNumber);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetClientById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Clients.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    private Client? GetClientById(string id) => _dbContext.Clients.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/EmployeeStorageContract.cs

@@ -0,0 +1,156 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class EmployeeStorageContract : IEmployeeStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public EmployeeStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(MagicCarpetDbContext).Assembly);
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<EmployeeDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Employees.AsQueryable();
+            if (onlyActive)
+            {
+                query = query.Where(x => !x.IsDeleted);
+            }
+            if (postId is not null)
+            {
+                query = query.Where(x => x.PostId == postId);
+            }
+            if (fromBirthDate is not null && toBirthDate is not null)
+            {
+                query = query.Where(x => x.BirthDate >= fromBirthDate && x.BirthDate <= toBirthDate);
+            }
+            if (fromEmploymentDate is not null && toEmploymentDate is not null)
+            {
+                query = query.Where(x => x.EmploymentDate >= fromEmploymentDate && x.EmploymentDate <= toEmploymentDate);
+            }
+            return [.. query.Select(x => _mapper.Map<EmployeeDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(GetEmployeeById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public EmployeeDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(_dbContext.Employees.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+    public EmployeeDataModel? GetElementByEmail(string email)
+    {
+        try
+        {
+            return _mapper.Map<EmployeeDataModel>(_dbContext.Employees.FirstOrDefault(x => x.Email == email));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            _dbContext.Employees.Add(_mapper.Map<Employee>(employeeDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", employeeDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(EmployeeDataModel employeeDataModel)
+    {
+        try
+        {
+            var element = GetEmployeeById(employeeDataModel.Id) ?? throw new ElementNotFoundException(employeeDataModel.Id);
+            _dbContext.Employees.Update(_mapper.Map(employeeDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetEmployeeById(id) ?? throw new ElementNotFoundException(id);
+            element.IsDeleted = true;
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Employee? GetEmployeeById(string id) => _dbContext.Employees.FirstOrDefault(x => x.Id == id && !x.IsDeleted);   
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/PostStorageContract.cs

@@ -0,0 +1,196 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class PostStorageContract : IPostStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Post, PostDataModel>()
+                .ForMember(x => x.Id, x => x.MapFrom(src => src.PostId));
+            cfg.CreateMap<PostDataModel, Post>()
+                .ForMember(x => x.Id, x => x.Ignore())
+                .ForMember(x => x.PostId, x => x.MapFrom(src => src.Id))
+                .ForMember(x => x.IsActual, x => x.MapFrom(src => true))
+                .ForMember(x => x.ChangeDate, x => x.MapFrom(src => DateTime.UtcNow));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<PostDataModel> GetList(bool onlyActual = true)
+    {
+        try
+        {
+            var query = _dbContext.Posts.AsQueryable();
+            if (onlyActual)
+            {
+                query = query.Where(x => x.IsActual);
+            }
+            return [.. query.Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<PostDataModel> GetPostWithHistory(string postId)
+    {
+        try
+        {
+            return [.. _dbContext.Posts.Where(x => x.PostId == postId).Select(x => _mapper.Map<PostDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostId == id && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public PostDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<PostDataModel>(_dbContext.Posts.FirstOrDefault(x => x.PostName == name && x.IsActual));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            _dbContext.Posts.Add(_mapper.Map<Post>(postDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostId_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", postDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(PostDataModel postDataModel)
+    {
+        try
+        {
+            var transaction = _dbContext.Database.BeginTransaction();
+            try
+            {
+                var element = GetPostById(postDataModel.Id) ?? throw new ElementNotFoundException(postDataModel.Id);
+                if (!element.IsActual)
+                {
+                    throw new ElementDeletedException(postDataModel.Id);
+                }
+                element.IsActual = false;
+                _dbContext.SaveChanges();
+                var newElement = _mapper.Map<Post>(postDataModel);
+                _dbContext.Posts.Add(newElement);
+                _dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Posts_PostName_IsActual" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostName", postDataModel.PostName);
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            if (!element.IsActual)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsActual = false;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetPostById(id) ?? throw new ElementNotFoundException(id);
+            element.IsActual = true;
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Post? GetPostById(string id) => _dbContext.Posts.Where(x => x.PostId == id)
+        .OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,62 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.EmployeeSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? employeeId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate);
+            if (employeeId is not null)
+            {
+                query = query.Where(x => x.EmployeeId == employeeId);
+            }
+            return [.. query.Select(x => _mapper.Map<SalaryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SalaryDataModel salaryDataModel)
+    {
+        try
+        {
+            _dbContext.Salaries.Add(_mapper.Map<Salary>(salaryDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SaleStorageContract.cs

@@ -0,0 +1,117 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class SaleStorageContract : ISaleStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SaleStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<SaleTour, SaleTourDataModel>();
+            cfg.CreateMap<SaleTourDataModel, SaleTour>();
+            cfg.CreateMap<Sale, SaleDataModel>();
+            cfg.CreateMap<SaleDataModel, Sale>()
+                .ForMember(x => x.IsCancel, x => x.MapFrom(src => false))
+                .ForMember(x => x.SaleTours, x => x.MapFrom(src => src.Tours));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SaleDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? employeeId = null, string? clientId = null, string? tourId = null)
+    {
+        try
+        {
+            var query = _dbContext.Sales.Include(x => x.SaleTours).AsQueryable();
+            if (startDate is not null && endDate is not null)
+            {
+                query = query.Where(x => x.SaleDate >= startDate && x.SaleDate < endDate);
+            }
+            if (employeeId is not null)
+            {
+                query = query.Where(x => x.EmployeeId == employeeId);
+            }
+            if (clientId is not null)
+            {
+                query = query.Where(x => x.ClientId == clientId);
+            }
+            if (tourId is not null)
+            {
+                query = query.Where(x => x.SaleTours!.Any(y => y.TourId == tourId));
+            }
+            return [.. query.Select(x => _mapper.Map<SaleDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SaleDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SaleDataModel>(GetSaleById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SaleDataModel saleDataModel)
+    {
+        try
+        {
+            _dbContext.Sales.Add(_mapper.Map<Sale>(saleDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetSaleById(id) ?? throw new ElementNotFoundException(id);
+            if (element.IsCancel)
+            {
+                throw new ElementDeletedException(id);
+            }
+            element.IsCancel = true;
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex) when (ex is ElementDeletedException || ex is ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Sale? GetSaleById(string id) => _dbContext.Sales.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/SuppliesStorageContract.cs

@@ -0,0 +1,100 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+public class SuppliesStorageContract : ISuppliesStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SuppliesStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Supplies, SuppliesDataModel>()
+       .ConstructUsing(src => new SuppliesDataModel(
+           src.Id,
+           src.Type,
+           src.ProductuionDate,
+           src.Count,
+           _mapper.Map<List<TourSuppliesDataModel>>(src.Tours)
+       ));
+
+            cfg.CreateMap<SuppliesDataModel, Supplies>();
+            cfg.CreateMap<TourSuppliesDataModel, TourSupplies>().ReverseMap();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<SuppliesDataModel> GetList(DateTime? startDate = null)
+    {
+        try
+        {
+            return [.. _dbContext.Supplieses.Select(x => _mapper.Map<SuppliesDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public SuppliesDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<SuppliesDataModel>(GetSuppliesById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(SuppliesDataModel suppliesDataModel)
+    {
+        try
+        {
+            _dbContext.Supplieses.Add(_mapper.Map<Supplies>(suppliesDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(SuppliesDataModel suppliesDataModel)
+    {
+        try
+        {
+            var element = GetSuppliesById(suppliesDataModel.Id) ?? throw new ElementNotFoundException(suppliesDataModel.Id);
+            _dbContext.Supplieses.Update(_mapper.Map(suppliesDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Supplies? GetSuppliesById(string id) => _dbContext.Supplieses.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/Implementations/TourStorageContract.cs

@@ -0,0 +1,169 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Implementations;
+
+internal class TourStorageContract : ITourStorageContract
+{
+    private readonly MagicCarpetDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public TourStorageContract(MagicCarpetDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Tour, TourDataModel>();
+            cfg.CreateMap<TourDataModel, Tour>();
+            cfg.CreateMap<TourHistory, TourHistoryDataModel>(); ;
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<TourDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Tours.Select(x => _mapper.Map<TourDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public List<TourHistoryDataModel> GetHistoryByTourId(string tourId)
+    {
+        try
+        {
+            return [.. _dbContext.TourHistories.Where(x => x.TourId == tourId).OrderByDescending(x => x.ChangeDate).Select(x => _mapper.Map<TourHistoryDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public TourDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<TourDataModel>(GetTourById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public TourDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<TourDataModel>(_dbContext.Tours.FirstOrDefault(x => x.TourName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(TourDataModel tourDataModel)
+    {
+        try
+        {
+            _dbContext.Tours.Add(_mapper.Map<Tour>(tourDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", tourDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Tours_TourName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("TourName", tourDataModel.TourName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(TourDataModel tourDataModel)
+    {
+        try
+        {
+            var element = GetTourById(tourDataModel.Id) ?? throw new ElementNotFoundException(tourDataModel.Id);
+            _dbContext.Tours.Update(_mapper.Map(tourDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Tours_TourName" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("TourName", tourDataModel.TourName);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetTourById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Tours.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void ResElement(string id)
+    {
+        try
+        {
+            var element = GetTourById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.SaveChanges();
+        }
+        catch
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+    }
+
+    private Tour? GetTourById(string id) => _dbContext.Tours.FirstOrDefault(x => x.Id == id);
+}

MagicCarpetProject/MagicCarpetDatabase/MagicCarpetDatabase.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MagicCarpetContracts\MagicCarpetContracts.csproj" />
+  </ItemGroup>
+	<ItemGroup>
+		<InternalsVisibleTo Include="MagicCarpetTests" />
+		<InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+	</ItemGroup>
+
+</Project>

MagicCarpetProject/MagicCarpetDatabase/MagicCarpetDbContext.cs

@@ -0,0 +1,66 @@
+using MagicCarpetContracts.Infrastructure;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase;
+
+public class MagicCarpetDbContext(IConfigurationDatabase configurationDatabase) : DbContext
+{
+    private readonly IConfigurationDatabase? _configurationDatabase = configurationDatabase;
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseNpgsql(_configurationDatabase?.ConnectionString, o => o.SetPostgresVersion(12, 2));
+        base.OnConfiguring(optionsBuilder);
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Client>().HasIndex(x => x.PhoneNumber).IsUnique();
+
+        modelBuilder.Entity<Tour>().HasIndex(x => x.TourName).IsUnique();
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostName, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<Post>()
+            .HasIndex(e => new { e.PostId, e.IsActual })
+            .IsUnique()
+            .HasFilter($"\"{nameof(Post.IsActual)}\" = TRUE");
+
+        modelBuilder.Entity<SaleTour>().HasKey(x => new { x.SaleId, x.TourId });
+
+        modelBuilder.Entity<TourSupplies>().HasKey(x => new { x.SuppliesId, x.TourId });
+
+        modelBuilder.Entity<TourAgency>().HasKey(x => new { x.AgencyId, x.TourId });
+    }
+
+    public DbSet<Client> Clients { get; set; }
+
+    public DbSet<Post> Posts { get; set; }
+
+    public DbSet<Tour> Tours { get; set; }
+
+    public DbSet<TourHistory> TourHistories { get; set; }
+
+    public DbSet<Salary> Salaries { get; set; }
+
+    public DbSet<Sale> Sales { get; set; }
+
+    public DbSet<SaleTour> SaleTours { get; set; }
+
+    public DbSet<Employee> Employees { get; set; }
+    public DbSet<Supplies> Supplieses { get; set; }
+    public DbSet<Agency> Agencies { get; set; }
+    public DbSet<TourSupplies> TourSupplieses { get; set; }
+    public DbSet<TourAgency> TourAgensies { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Agency.cs

@@ -0,0 +1,21 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class Agency
+{
+    public required string Id { get; set; }
+    public required TourType Type { get; set; }
+    public required int Count { get; set; }
+
+    [ForeignKey("AgencyId")]
+    public List<TourAgency>? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Client.cs

@@ -0,0 +1,24 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+[AutoMap(typeof(ClientDataModel), ReverseMap = true)]
+public class Client
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; } 
+
+    public required string PhoneNumber { get;  set; } 
+
+    public double DiscountSize { get;  set; }
+    [ForeignKey("ClientId")]
+    public List<Sale>? Sales { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Employee.cs

@@ -0,0 +1,32 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+[AutoMap(typeof(EmployeeDataModel), ReverseMap = true)]
+public class Employee
+{
+    public required string Id { get; set; }
+
+    public required string FIO { get; set; }
+
+    public string Email { get; set; }
+
+    public string PostId { get; set; }
+
+    public DateTime BirthDate { get; set; }
+
+    public DateTime EmploymentDate { get; set; } 
+
+    public bool IsDeleted { get;  set; }
+    [ForeignKey("EmployeeId")]
+    public List<Salary>? Salaries { get; set; }
+    [ForeignKey("EmployeeId")]
+    public List<Sale>? Sales { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Post.cs

@@ -0,0 +1,20 @@
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class Post
+{
+    public required string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string PostId { get; set; }
+    public required string PostName { get; set; }
+    public PostType PostType { get; set; }
+    public double Salary { get; set; }
+    public bool IsActual { get; set; }
+    public DateTime ChangeDate { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Salary.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class Salary
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string EmployeeId { get; set; }
+    public DateTime SalaryDate { get; set; } 
+    public double EmployeeSalary { get; set; }
+    public Employee? Employee { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Sale.cs

@@ -0,0 +1,32 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class Sale
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+
+    public required string EmployeeId { get; set; } 
+     
+    public string? ClientId { get; set; } 
+
+    public DateTime SaleDate { get; set; } 
+    public double Sum { get; set; } 
+
+    public DiscountType DiscountType { get; set; } 
+
+    public double Discount { get; set; } 
+
+    public bool IsCancel { get; set; }
+    public Employee? Employee { get; set; }
+    public Client? Client { get; set; }
+    [ForeignKey("SaleId")]
+    public List<SaleTour>? SaleTours { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/SaleTour.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class SaleTour
+{
+    public required string SaleId { get; set; } 
+
+    public required string TourId { get; set; } 
+
+    public int Count { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Supplies.cs

@@ -0,0 +1,22 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class Supplies
+{
+    public required string Id { get; set; }
+    public required TourType Type { get; set; }
+    public DateTime ProductuionDate { get; set; }
+    public required int Count { get; set; }
+
+    [ForeignKey("SuppliesId")]
+    public List<TourSupplies>? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/Tour.cs

@@ -0,0 +1,30 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+[AutoMap(typeof(TourDataModel), ReverseMap = true)]
+public class Tour
+{
+    public required string Id { get; set; } 
+    public required string TourName { get; set; } 
+    public string? TourCountry { get; set; } 
+    public double Price { get; set; } 
+    public required TourType TourType { get; set; }
+    [ForeignKey("TourId")]
+    public List<SaleTour>? SaleTours { get; set; }
+    [ForeignKey("TourId")]
+    public List<TourHistory>? TourHistories { get; set; }
+    [ForeignKey("SuppliesesId")]
+    public List<TourSupplies>? TourSupplies { get; set; }
+    [ForeignKey("AgenciesId")]
+    public List<TourAgency>? TourAgency { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/TourAgency.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class TourAgency
+{
+    public required string AgencyId { get; set; }
+    public required string TourId { get; set; }
+    public int Count { get; set; }
+    public Agency? Agencies { get; set; }
+    public Tour? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/TourHistory.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+public class TourHistory
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string TourId { get; set; }
+    public double OldPrice { get;  set; } 
+    public DateTime ChangeDate { get; set; } 
+    public Tour? Tour { get; set; }
+}

MagicCarpetProject/MagicCarpetDatabase/Models/TourSupplies.cs

@@ -0,0 +1,19 @@
+using AutoMapper;
+using MagicCarpetContracts.DataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetDatabase.Models;
+
+[AutoMap(typeof(TourSuppliesDataModel), ReverseMap = true)]
+public class TourSupplies
+{
+    public required string SuppliesId { get; set; }
+    public required string TourId { get; set; }
+    public int Count { get; set; }
+    public Supplies? Supplies { get; set; }
+    public Tour? Tours { get; set; }
+}

MagicCarpetProject/MagicCarpetProject.sln

@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MagicCarpetTests", "MagicCa
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MagicCarpetBusinessLogic", "MagicCarpetBusinessLogic\MagicCarpetBusinessLogic.csproj", "{688F9182-851F-4CF8-97CD-9B6F1E43D758}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MagicCarpetDatabase", "MagicCarpetDatabase\MagicCarpetDatabase.csproj", "{C69B43B2-8680-42D7-A111-306E2E8225FE}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{688F9182-851F-4CF8-97CD-9B6F1E43D758}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{688F9182-851F-4CF8-97CD-9B6F1E43D758}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{688F9182-851F-4CF8-97CD-9B6F1E43D758}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C69B43B2-8680-42D7-A111-306E2E8225FE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C69B43B2-8680-42D7-A111-306E2E8225FE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C69B43B2-8680-42D7-A111-306E2E8225FE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C69B43B2-8680-42D7-A111-306E2E8225FE}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MagicCarpetProject/MagicCarpetTests/BusinessLogicContractsTests/AgencyBusinessLogicContractTests.cs

@@ -0,0 +1,296 @@
+using MagicCarpetBusinessLogic.Implementations;
+using MagicCarpetContracts.BusinessLogicContracts;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.BusinessLogicContractsTests;
+
+[TestFixture]
+internal class AgencyBusinessLogicContractTests 
+{
+    private IAgencyBusinessLogicContract _warehouseBusinessLogicContract;
+    private Mock<IAgencyStorageContract> _warehouseStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _warehouseStorageContract = new Mock<IAgencyStorageContract>();
+        _warehouseBusinessLogicContract = new AgencyBusinessLogicContract(_warehouseStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        _warehouseStorageContract.Reset();
+    }
+
+    public void GetAllSupplies_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var listOriginal = new List<AgencyDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), TourType.Beach, 1, []),
+            new(Guid.NewGuid().ToString(), TourType.Beach, 1, []),
+            new(Guid.NewGuid().ToString(), TourType.Beach, 1, []),
+        };
+        _warehouseStorageContract.Setup(x => x.GetList()).Returns(listOriginal);
+        // Act
+        var list = _warehouseBusinessLogicContract.GetAllComponents();
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+    }
+
+    [Test]
+    public void GetAllSupplies_ReturnEmptyList_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.GetList()).Returns([]);
+        // Act
+        var list = _warehouseBusinessLogicContract.GetAllComponents();
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _warehouseStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSupplies_ReturnNull_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.GetList()).Returns((List<AgencyDataModel>)null);
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.GetAllComponents(), Throws.TypeOf<NullListException>());
+        _warehouseStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.GetList()).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.GetAllComponents(), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+
+    [Test]
+    public void GetSuppliesByData_GetById_ReturnRecord_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new AgencyDataModel(id, TourType.Beach, 1, []);
+        _warehouseStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        // Act
+        var element = _warehouseBusinessLogicContract.GetComponentByData(id);
+        // Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _warehouseStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetComponentsByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.GetComponentByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _warehouseBusinessLogicContract.GetComponentByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _warehouseStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetSuppliesByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new ElementNotFoundException(""));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.GetComponentByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _warehouseStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSuppliesByData_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.GetComponentByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new AgencyDataModel(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<AgencyDataModel>()));
+        // Act
+        _warehouseBusinessLogicContract.InsertComponent(record);
+        // Assert
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<AgencyDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(null), Throws.TypeOf<ArgumentNullException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<AgencyDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new AgencyDataModel("id", TourType.Beach, 1, [])), Throws.TypeOf<ValidationException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<AgencyDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<AgencyDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new AgencyDataModel(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<AgencyDataModel>()));
+        // Act
+        _warehouseBusinessLogicContract.UpdateComponent(record);
+        // Assert
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithIncorrectData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<AgencyDataModel>())).Throws(new ElementNotFoundException(""));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementNotFoundException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<AgencyDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(null), Throws.TypeOf<ArgumentNullException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new AgencyDataModel(Guid.NewGuid().ToString(), TourType.Beach, 1, [])), Throws.TypeOf<ValidationException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<AgencyDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, 1,
+            [new TourAgencyDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<AgencyDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteComponents_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _warehouseStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });
+        //Act
+        _warehouseBusinessLogicContract.DeleteComponent(id);
+        //Assert
+        _warehouseStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once); Assert.That(flag);
+    }
+
+    [Test]
+    public void DeleteComponents_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _warehouseStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.DeleteComponent(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _warehouseStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void DeleteComponents_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.DeleteComponent(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _warehouseBusinessLogicContract.DeleteComponent(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _warehouseStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteComponents_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.DeleteComponent("id"),
+        Throws.TypeOf<ValidationException>());
+        _warehouseStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void DeleteComponents_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _warehouseStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.DeleteComponent(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

MagicCarpetProject/MagicCarpetTests/BusinessLogicContractsTests/SaleBusinessLogicContractTests.cs

@@ -18,18 +18,22 @@ internal class SaleBusinessLogicContractTests
 {
     private SaleBusinessLogicContract _saleBusinessLogicContract;
     private Mock<ISaleStorageContract> _saleStorageContract;
+    private Mock<IAgencyStorageContract> _agencyStorageContract;
 
     [OneTimeSetUp]
     public void OneTimeSetUp()
     {
         _saleStorageContract = new Mock<ISaleStorageContract>();
-        _saleBusinessLogicContract = new SaleBusinessLogicContract(_saleStorageContract.Object, new Mock<ILogger>().Object);
+        _agencyStorageContract = new Mock<IAgencyStorageContract>();
+        _saleBusinessLogicContract = new SaleBusinessLogicContract(_saleStorageContract.Object,
+            _agencyStorageContract.Object, new Mock<ILogger>().Object);
     }
 
     [TearDown]
     public void TearDown()
     {
         _saleStorageContract.Reset();
+        _agencyStorageContract.Reset();
     }
 
     [Test]
@@ -396,6 +400,7 @@ internal class SaleBusinessLogicContractTests
         var flag = false;
         var record = new SaleDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.None, 10,
             false, [new SaleTourDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _agencyStorageContract.Setup(x => x.CheckComponents(It.IsAny<SaleDataModel>())).Returns(true);
         _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>()))
             .Callback((SaleDataModel x) =>
             {
@@ -409,6 +414,7 @@ internal class SaleBusinessLogicContractTests
         //Act
         _saleBusinessLogicContract.InsertSale(record);
         //Assert
+        _agencyStorageContract.Verify(x => x.CheckComponents(It.IsAny<SaleDataModel>()), Times.Once);
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
         Assert.That(flag);
     }
@@ -417,11 +423,13 @@ internal class SaleBusinessLogicContractTests
     public void InsertSale_RecordWithExistsData_ThrowException_Test()
     {
         //Arrange
+        _agencyStorageContract.Setup(x => x.CheckComponents(It.IsAny<SaleDataModel>())).Returns(true);
         _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>())).Throws(new ElementExistsException("Data", "Data"));
         //Act&Assert
         Assert.That(() => _saleBusinessLogicContract.InsertSale(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
             Guid.NewGuid().ToString(), 10, DiscountType.None, 10, false, [new SaleTourDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
+        _agencyStorageContract.Verify(x => x.CheckComponents(It.IsAny<SaleDataModel>()), Times.Once);
     }
 
     [Test]
@@ -444,13 +452,27 @@ internal class SaleBusinessLogicContractTests
     public void InsertSale_StorageThrowError_ThrowException_Test()
     {
         //Arrange
+        _agencyStorageContract.Setup(x => x.CheckComponents(It.IsAny<SaleDataModel>())).Returns(true);
         _saleStorageContract.Setup(x => x.AddElement(It.IsAny<SaleDataModel>())).Throws(new StorageException(new InvalidOperationException()));
         //Act&Assert
         Assert.That(() => _saleBusinessLogicContract.InsertSale(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
             Guid.NewGuid().ToString(), 10, DiscountType.None, 10, false, [new SaleTourDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _agencyStorageContract.Verify(x => x.CheckComponents(It.IsAny<SaleDataModel>()), Times.Once);
         _saleStorageContract.Verify(x => x.AddElement(It.IsAny<SaleDataModel>()), Times.Once);
     }
 
+    [Test]
+    public void InsertSale_InsufficientError_ThrowException_Test()
+    {
+        //Arrange
+        _agencyStorageContract.Setup(x => x.CheckComponents(It.IsAny<SaleDataModel>())).Returns(false);
+        Assert.That(() => _saleBusinessLogicContract.InsertSale(new SaleDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),
+            Guid.NewGuid().ToString(), 10, DiscountType.None, 10, false,
+            [new SaleTourDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<InsufficientException>());
+        //Act&Assert
+        _agencyStorageContract.Verify(x => x.CheckComponents(It.IsAny<SaleDataModel>()), Times.Once);
+    }
+
     [Test]
     public void CancelSale_CorrectRecord_Test()
     {

MagicCarpetProject/MagicCarpetTests/BusinessLogicContractsTests/SuppliesBusinessLogicContractTests.cs

@@ -0,0 +1,242 @@
+using MagicCarpetBusinessLogic.Implementations;
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.BusinessLogicContractsTests;
+
+[TestFixture]
+internal class SuppliesBusinessLogicContractTests 
+{
+    private SuppliesBusinessLogicContract _suppliesBusinessLogicContract;
+    private Mock<ISuppliesStorageContract> _suppliesStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _suppliesStorageContract = new Mock<ISuppliesStorageContract>();
+        _suppliesBusinessLogicContract = new SuppliesBusinessLogicContract(_suppliesStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        _suppliesStorageContract.Reset();
+    }
+
+    [Test]
+    public void GetAllSupplies_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var listOriginal = new List<SuppliesDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, []),
+            new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, []),
+            new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, []),
+        };
+        _suppliesStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>())).Returns(listOriginal);
+        // Act
+        var list = _suppliesBusinessLogicContract.GetAllComponents();
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+    }
+
+    [Test]
+    public void GetAllSupplies_ReturnEmptyList_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>())).Returns([]);
+        // Act
+        var list = _suppliesBusinessLogicContract.GetAllComponents();
+        // Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _suppliesStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSupplies_ReturnNull_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>())).Returns((List<SuppliesDataModel>)null);
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.GetAllComponents(), Throws.TypeOf<NullListException>());
+        _suppliesStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetAllSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.GetAllComponents(), Throws.TypeOf<StorageException>());
+        _suppliesStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSuppliesByData_GetById_ReturnRecord_Test()
+    {
+        // Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new SuppliesDataModel(id,TourType.Beach, DateTime.Now, 1, []);
+        _suppliesStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
+        // Act
+        var element = _suppliesBusinessLogicContract.GetComponentByData(id);
+        // Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _suppliesStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetComponentsByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _suppliesBusinessLogicContract.GetComponentByData(null), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() => _suppliesBusinessLogicContract.GetComponentByData(string.Empty), Throws.TypeOf<ArgumentNullException>());
+        _suppliesStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+
+    [Test]
+    public void GetSuppliesByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new ElementNotFoundException(""));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.GetComponentByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+        _suppliesStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void GetSuppliesByData_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.GetComponentByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
+        _suppliesStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new SuppliesDataModel(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _suppliesStorageContract.Setup(x => x.AddElement(It.IsAny<SuppliesDataModel>()));
+        // Act
+        _suppliesBusinessLogicContract.InsertComponent(record);
+        // Assert
+        _suppliesStorageContract.Verify(x => x.AddElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.AddElement(It.IsAny<SuppliesDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _suppliesStorageContract.Verify(x => x.AddElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.InsertComponent(null), Throws.TypeOf<ArgumentNullException>());
+        _suppliesStorageContract.Verify(x => x.AddElement(It.IsAny<SuppliesDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _suppliesBusinessLogicContract.InsertComponent(new SuppliesDataModel("id", TourType.Beach, DateTime.UtcNow, 1, [])), Throws.TypeOf<ValidationException>());
+        _suppliesStorageContract.Verify(x => x.AddElement(It.IsAny<SuppliesDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.AddElement(It.IsAny<SuppliesDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _suppliesStorageContract.Verify(x => x.AddElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new SuppliesDataModel(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _suppliesStorageContract.Setup(x => x.UpdElement(It.IsAny<SuppliesDataModel>()));
+        // Act
+        _suppliesBusinessLogicContract.UpdateComponent(record);
+        // Assert
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithIncorrectData_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.UpdElement(It.IsAny<SuppliesDataModel>())).Throws(new ElementNotFoundException(""));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementNotFoundException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.UpdElement(It.IsAny<SuppliesDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_NullRecord_ThrowException_Test()
+    {
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.UpdateComponent(null), Throws.TypeOf<ArgumentNullException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _suppliesBusinessLogicContract.UpdateComponent(new SuppliesDataModel(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, [])), Throws.TypeOf<ValidationException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _suppliesStorageContract.Setup(x => x.UpdElement(It.IsAny<SuppliesDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _suppliesBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1,
+            [new TourSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+}

MagicCarpetProject/MagicCarpetTests/BusinessLogicContractsTests/TourBusinessLogicContractTests.cs

@@ -3,6 +3,7 @@ using MagicCarpetContracts.DataModels;
 using MagicCarpetContracts.Enums;
 using MagicCarpetContracts.Exceptions;
 using MagicCarpetContracts.StoragesContracts;
+using MagicCarpetTests.DataModelTests;
 using Microsoft.Extensions.Logging;
 using Moq;
 using System;
@@ -154,7 +155,7 @@ internal class TourBusinessLogicContractTests
     {
         //Arrange
         var id = Guid.NewGuid().ToString();
-        var record = new TourDataModel(id, "name","country", 10, TourType.Ski);
+        var record = new TourDataModel(id, "name", "country", 10, TourType.Ski);
         _tourStorageContract.Setup(x => x.GetElementById(id)).Returns(record);
         //Act
         var element = _tourBusinessLogicContract.GetTourByData(id);
@@ -183,7 +184,7 @@ internal class TourBusinessLogicContractTests
     {
         //Arrange
         var country = "country";
-        var record = new TourDataModel(Guid.NewGuid().ToString(), "name", country, 10, TourType.Ski);
+        var record = new TourDataModel(Guid.NewGuid().ToString(), "name", country, 10, TourType.Ski);  
         _tourStorageContract.Setup(x => x.GetElementByName(country)).Returns(record);
         //Act
         var element = _tourBusinessLogicContract.GetTourByData(country);
@@ -249,7 +250,7 @@ internal class TourBusinessLogicContractTests
             .Callback((TourDataModel x) =>
             {
                 flag = x.Id == record.Id && x.TourName == record.TourName && x.TourCountry == record.TourCountry 
-                    && x.Price == record.Price && x.Type == record.Type;
+                    && x.Price == record.Price && x.TourType == record.TourType;
             });
         //Act
         _tourBusinessLogicContract.InsertTour(record);
@@ -288,10 +289,18 @@ internal class TourBusinessLogicContractTests
     public void InsertTour_StorageThrowError_ThrowException_Test()
     {
         //Arrange
-        _tourStorageContract.Setup(x => x.AddElement(It.IsAny<TourDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        Assert.That(() => _tourBusinessLogicContract.InsertTour(new TourDataModel(Guid.NewGuid().ToString(), "name","country", 10, TourType.Ski)), Throws.TypeOf<InsufficientException>());
         //Act&Assert
-        Assert.That(() => _tourBusinessLogicContract.InsertTour(new(Guid.NewGuid().ToString(), "name", "country", 10, TourType.Ski)), Throws.TypeOf<StorageException>());
-        _tourStorageContract.Verify(x => x.AddElement(It.IsAny<TourDataModel>()), Times.Once);
+        _tourStorageContract.Verify(x => x.UpdElement(It.IsAny<TourDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertFurniture_InsufficientError_ThrowException_Test()
+    {
+        //Arrange
+        Assert.That(() => _tourBusinessLogicContract.InsertTour(new TourDataModel(Guid.NewGuid().ToString(), "name", "country", 10, TourType.Ski)),Throws.TypeOf<InsufficientException>());
+        //Act&Assert
+        _tourStorageContract.Verify(x => x.UpdElement(It.IsAny<TourDataModel>()), Times.Never);
     }
 
     [Test]
@@ -304,7 +313,7 @@ internal class TourBusinessLogicContractTests
             .Callback((TourDataModel x) =>
             {
                 flag = x.Id == record.Id && x.TourName == record.TourName && x.TourCountry == record.TourCountry
-                    && x.Price == record.Price && x.Type == record.Type;
+                    && x.Price == record.Price && x.TourType == record.TourType;
             });
         //Act
         _tourBusinessLogicContract.UpdateTour(record);
@@ -329,7 +338,7 @@ internal class TourBusinessLogicContractTests
         //Arrange
         _tourStorageContract.Setup(x => x.UpdElement(It.IsAny<TourDataModel>())).Throws(new ElementExistsException("Data", "Data"));
         //Act&Assert
-        Assert.That(() => _tourBusinessLogicContract.UpdateTour(new(Guid.NewGuid().ToString(), "name", "country", 10, TourType.Ski)), Throws.TypeOf<ElementExistsException>());
+        Assert.That(() => _tourBusinessLogicContract.UpdateTour(new(Guid.NewGuid().ToString(), "name", "country", 10, TourType.Ski)), Throws.TypeOf <ElementExistsException>());
         _tourStorageContract.Verify(x => x.UpdElement(It.IsAny<TourDataModel>()), Times.Once);
     }
 

MagicCarpetProject/MagicCarpetTests/DataModelTests/AgencyDataModelTests.cs

@@ -0,0 +1,79 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.DataModelTests;
+
+[TestFixture]
+internal class AgencyDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, TourType.Beach, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(string.Empty, TourType.Beach, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", TourType.Beach, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TypeIsNoneTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, 0, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, -1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ToursIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), TourType.Beach, 1, null);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+
+        sale = CreateDataModel(Guid.NewGuid().ToString(), TourType.Beach, 1, []);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var type = TourType.Beach;
+        var count = 1;
+        var tours = CreateSubDataModel();
+        var model = CreateDataModel(id, type, count, tours);
+        Assert.DoesNotThrow(() => model.Validate());
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.Id, Is.EqualTo(id));
+            Assert.That(model.Type, Is.EqualTo(type));
+            Assert.That(model.Count, Is.EqualTo(count));
+            Assert.That(model.Tours, Is.EqualTo(tours));
+        });
+    }
+
+    private static AgencyDataModel CreateDataModel(string? id, TourType type, int count, List<TourAgencyDataModel> tours)
+        => new AgencyDataModel(id, type, count, tours);
+    private static List<TourAgencyDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

MagicCarpetProject/MagicCarpetTests/DataModelTests/SuppliesDataModelTests.cs

@@ -0,0 +1,80 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.DataModelTests;
+
+[TestFixture]
+internal class SuppliesDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, TourType.Beach, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(string.Empty, TourType.Beach, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", TourType.Beach, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TypeIsNoneTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, DateTime.Now, 1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, DateTime.Now, 0, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), TourType.None, DateTime.Now, -1, CreateSubDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void ToursIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, null);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), TourType.Beach, DateTime.Now, 1, []);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var type = TourType.Beach;
+        var date = DateTime.Now;
+        var count = 1;
+        var tours = CreateSubDataModel();
+        var model = CreateDataModel(id, type, date, count, tours);
+        Assert.DoesNotThrow(() => model.Validate());
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.Id, Is.EqualTo(id));
+            Assert.That(model.Type, Is.EqualTo(type));
+            Assert.That(model.ProductuionDate, Is.EqualTo(date));
+            Assert.That(model.Count, Is.EqualTo(count));
+            Assert.That(model.Tours, Is.EqualTo(tours));
+        });
+    }
+
+    private static SuppliesDataModel CreateDataModel(string? id, TourType type, DateTime date, int count, List<TourSuppliesDataModel> tours)
+            => new(id, type, date, count, tours);
+    private static List<TourSuppliesDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

MagicCarpetProject/MagicCarpetTests/DataModelTests/TourAgencyDataModelTests.cs

@@ -0,0 +1,75 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.DataModelTests;
+
+[TestFixture]
+internal class TourAgencyDataModelTests
+{
+    [Test]
+    public void AgencyIdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AgencyIdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TourIdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), null, 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TourIdIsNotGuidTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), "id", 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var agencyId = Guid.NewGuid().ToString();
+        var tourId = Guid.NewGuid().ToString();
+        var count = 1;
+        var model = CreateDataModel(agencyId, tourId, count);
+        Assert.That(() => model.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.AgencyId, Is.EqualTo(agencyId));
+            Assert.That(model.TourId, Is.EqualTo(tourId));
+            Assert.That(model.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static TourAgencyDataModel CreateDataModel(string? agencyId, string? tourId, int count)
+        => new(agencyId, tourId, count);
+}

MagicCarpetProject/MagicCarpetTests/DataModelTests/TourDataModelTests.cs

@@ -3,6 +3,7 @@ using MagicCarpetContracts.Enums;
 using MagicCarpetContracts.Exceptions;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -14,17 +15,17 @@ internal class TourDataModelTests
     [Test]
     public void IdIsNullOrEmptyTest()
     {
-        var cocktail = CreateDataModel(null, "name", "country", 10.5, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
-        cocktail = CreateDataModel(string.Empty, "name", "country", 10.5, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
+        var tour = CreateDataModel(null, "name", "country", 10.5, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
+        tour = CreateDataModel(string.Empty, "name", "country", 10.5, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void IdIsNotGuidTest()
     {
-        var cocktail = CreateDataModel("id", "name", "country", 10.5, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
+        var tour = CreateDataModel("id", "name", "country", 10.5, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
@@ -46,17 +47,17 @@ internal class TourDataModelTests
     [Test]
     public void PriceIsLessOrZeroTest()
     {
-        var cocktail = CreateDataModel(Guid.NewGuid().ToString(), null, null, 0, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
-        cocktail = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, string.Empty, -10.5, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
+        var tour = CreateDataModel(Guid.NewGuid().ToString(), null, null, 0, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
+        tour = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, string.Empty, -10.5, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void TourTypeIsNoneTest()
     {
-        var cocktail = CreateDataModel(Guid.NewGuid().ToString(), null, null, 0, TourType.Beach);
-        Assert.That(() => cocktail.Validate(), Throws.TypeOf<ValidationException>());
+        var tour = CreateDataModel(Guid.NewGuid().ToString(), null, null, 0, TourType.Beach);
+        Assert.That(() => tour.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
@@ -67,6 +68,8 @@ internal class TourDataModelTests
         var tourCountry = "country";
         var price = 10.5;
         var tourType = TourType.Ski;
+        var supplies = CreateSuppliesDataModel();
+        var agency = CreateAgencyDataModel();
         var tour = CreateDataModel(tourId, tourName, tourCountry, price, tourType);
         Assert.That(() => tour.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
@@ -75,10 +78,15 @@ internal class TourDataModelTests
             Assert.That(tour.TourName, Is.EqualTo(tourName));
             Assert.That(tour.TourCountry, Is.EqualTo(tourCountry));
             Assert.That(tour.Price, Is.EqualTo(price));
-            Assert.That(tour.Type, Is.EqualTo(tourType));
+            Assert.That(tour.TourType, Is.EqualTo(tourType));
         });
     }
 
-    private static TourDataModel CreateDataModel(string? id, string? tourName, string? countryName,double price, TourType tourType) =>
+    private static TourDataModel CreateDataModel(string? id, string? tourName, string? countryName, double price, TourType tourType) =>
         new(id, tourName, countryName,price, tourType);
+    private static List<TourSuppliesDataModel> CreateSuppliesDataModel()
+                => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+
+    private static List<TourAgencyDataModel> CreateAgencyDataModel()
+                => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
 }

MagicCarpetProject/MagicCarpetTests/DataModelTests/TourSuppliesDataModelTests.cs

@@ -0,0 +1,75 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.DataModelTests;
+
+[TestFixture]
+internal class TourSuppliesDataModelTests
+{
+    [Test]
+    public void SuppliesIdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SuppliesIdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TourIdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), null, 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TourIdIsNotGuidTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), "id", 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var suppliesId = Guid.NewGuid().ToString();
+        var tourId = Guid.NewGuid().ToString();
+        var count = 1;
+        var model = CreateDataModel(suppliesId, tourId, count);
+        Assert.That(() => model.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.SuppliesId, Is.EqualTo(suppliesId));
+            Assert.That(model.TourId, Is.EqualTo(tourId));
+            Assert.That(model.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static TourSuppliesDataModel CreateDataModel(string? suppliesId, string? tourId, int count)
+        => new(suppliesId, tourId, count);
+}

MagicCarpetProject/MagicCarpetTests/Infrastructure/ConfigurationDatabaseTest.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using MagicCarpetContracts.Infrastructure;
+
+namespace MagicCarpetTests.Infrastructure;
+
+internal class ConfigurationDatabaseTest : IConfigurationDatabase
+{
+    public string ConnectionString => "Host=127.0.0.1;Port=5432;Database=MagicCarpetTest;Username=postgres;Password=postgres;";
+}

MagicCarpetProject/MagicCarpetTests/MagicCarpetTests.csproj

@@ -11,6 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="NUnit" Version="3.14.0" />
@@ -21,6 +22,7 @@
   <ItemGroup>
     <ProjectReference Include="..\MagicCarpetBusinessLogic\MagicCarpetBusinessLogic.csproj" />
     <ProjectReference Include="..\MagicCarpetContracts\MagicCarpetContracts.csproj" />
+    <ProjectReference Include="..\MagicCarpetDatabase\MagicCarpetDatabase.csproj" />
   </ItemGroup>
 
   <ItemGroup>

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/AgencyStorageContractTests.cs

@@ -0,0 +1,215 @@
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using MagicCarpetDatabase.Models;
+using MagicCarpetContracts.Enums;
+using Microsoft.EntityFrameworkCore;
+using MagicCarpetContracts.DataModels;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class AgencyStorageContractTests : BaseStorageContractTest
+{
+    private AgencyStorageContract _agencyStorageContract;
+    private Tour _tour;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _agencyStorageContract = new AgencyStorageContract(MagicCarpetDbContext);
+        _tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name", TourType.Sightseeing);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Agencies\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Tours\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var agency = InsertAgencyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Sightseeing, 5);
+        InsertAgencyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Sightseeing, 5);
+        InsertAgencyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Sightseeing, 5);
+        var list = _agencyStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), agency);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _agencyStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var agency = InsertAgencyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Sightseeing, 5);
+        var result = _agencyStorageContract.GetElementById(agency.Id);
+        AssertElement(result, agency);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _agencyStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenValidData_Test()
+    {
+        var agency = CreateModel(Guid.NewGuid().ToString(), TourType.Sightseeing, 5, [_tour.Id]);
+        _agencyStorageContract.AddElement(agency);
+        var result = GetAgencyFromDatabaseById(agency.Id);
+        AssertElement(result, agency);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var agency = CreateModel(Guid.NewGuid().ToString(), TourType.Sightseeing, 5, [_tour.Id]);
+        InsertAgencyToDatabaseAndReturn(agency.Id, TourType.Sightseeing, 5, [(_tour.Id, 3)]);
+        Assert.That(() => _agencyStorageContract.AddElement(agency), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenNoHaveTour_Test()
+    {
+        var agency = CreateModel(Guid.NewGuid().ToString(), TourType.Sightseeing, 0, [_tour.Id]);
+        InsertAgencyToDatabaseAndReturn(agency.Id, TourType.Sightseeing, 5, [(_tour.Id, 3)]);
+        Assert.That(() => _agencyStorageContract.AddElement(agency), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenValidData_Test()
+    {
+        var agency = CreateModel(Guid.NewGuid().ToString(), TourType.Sightseeing, 5, [_tour.Id]);
+        InsertAgencyToDatabaseAndReturn(agency.Id, TourType.Ski, 10, null);
+        _agencyStorageContract.UpdElement(agency);
+        var result = GetAgencyFromDatabaseById(agency.Id);
+        AssertElement(result, agency);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        var agency = CreateModel(Guid.NewGuid().ToString(), TourType.Sightseeing, 5, [_tour.Id]);
+        Assert.That(() => _agencyStorageContract.UpdElement(agency), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordExists_Test()
+    {
+        var agency = InsertAgencyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Sightseeing, 5);
+        _agencyStorageContract.DelElement(agency.Id);
+        var result = GetAgencyFromDatabaseById(agency.Id);
+        Assert.That(result, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordDoesNotExist_ThrowsElementNotFoundException()
+    {
+        Assert.That(() => _agencyStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Tour InsertTourToDatabaseAndReturn(string id, string name, TourType type)
+    {
+        var tour = new Tour { Id = id, TourName = name, TourType = type };
+        MagicCarpetDbContext.Tours.Add(tour);
+        MagicCarpetDbContext.SaveChanges();
+        return tour;
+    }
+
+    private Agency InsertAgencyToDatabaseAndReturn(string id, TourType type, int count, List<(string, int)>? tours = null)
+    {
+        var agency = new Agency { Id = id, Type = type, Count = count, Tours = [] };
+        if (tours is not null)
+        {
+            foreach (var elem in tours)
+            {
+                agency.Tours.Add(new TourAgency { AgencyId = agency.Id, TourId = elem.Item1, Count = elem.Item2 });
+            }
+        }
+        MagicCarpetDbContext.Agencies.Add(agency);
+        MagicCarpetDbContext.SaveChanges();
+        return agency;
+    }
+
+    private static void AssertElement(AgencyDataModel? actual, Agency expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+        });
+        if (expected.Tours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static void AssertElement(Agency? actual, AgencyDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+        });
+        if (expected.Tours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static AgencyDataModel CreateModel(string id, TourType type, int count, List<string> toursIds)
+    {
+        var tours = toursIds.Select(x => new TourAgencyDataModel(id, x, 1)).ToList();
+        return new(id, type, count, tours);
+    }
+
+    private Agency? GetAgencyFromDatabaseById(string id)
+    {
+        return MagicCarpetDbContext.Agencies.FirstOrDefault(x => x.Id == id);
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/BaseStorageContractTest.cs

@@ -0,0 +1,30 @@
+using MagicCarpetTests.Infrastructure;
+using MagicCarpetDatabase;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+internal abstract class BaseStorageContractTest
+{
+    protected MagicCarpetDbContext MagicCarpetDbContext { get; private set; }
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        MagicCarpetDbContext = new MagicCarpetDbContext(new ConfigurationDatabaseTest());
+
+        MagicCarpetDbContext.Database.EnsureDeleted();
+        MagicCarpetDbContext.Database.EnsureCreated();
+    }
+
+    [OneTimeTearDown]
+    public void OneTimeTearDown()
+    {
+        MagicCarpetDbContext.Database.EnsureDeleted();
+        MagicCarpetDbContext.Dispose();
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/ClientStorageContractTests.cs

@@ -0,0 +1,217 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class ClientStorageContractTests : BaseStorageContractTest
+{
+    private ClientStorageContarct _clientStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _clientStorageContract = new ClientStorageContarct(MagicCarpetDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Clients\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+5-555-555-55-55");
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+6-666-666-66-66");
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: "+7-777-777-77-77");
+        var list = _clientStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == client.Id), client);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _clientStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementById(client.Id), client);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _clientStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementByFIO(client.FIO), client);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _clientStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenHaveRecord_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_clientStorageContract.GetElementByPhoneNumber(client.PhoneNumber), client);
+    }
+
+    [Test]
+    public void Try_GetElementByPhoneNumber_WhenNoRecord_Test()
+    {
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _clientStorageContract.GetElementByPhoneNumber("+8-888-888-88-88"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var client = CreateModel(Guid.NewGuid().ToString());
+        _clientStorageContract.AddElement(client);
+        AssertElement(GetClientFromDatabase(client.Id), client);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+        InsertClientToDatabaseAndReturn(client.Id);
+        Assert.That(() => _clientStorageContract.AddElement(client), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSamePhoneNumber_Test()
+    {
+        var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: client.PhoneNumber);
+        Assert.That(() => _clientStorageContract.AddElement(client), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+        InsertClientToDatabaseAndReturn(client.Id);
+        _clientStorageContract.UpdElement(client);
+        AssertElement(GetClientFromDatabase(client.Id), client);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _clientStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSamePhoneNumber_Test()
+    {
+        var client = CreateModel(Guid.NewGuid().ToString(), "New Fio", "+5-555-555-55-55", 500);
+        InsertClientToDatabaseAndReturn(client.Id, phoneNumber: "+7-777-777-77-77");
+        InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString(), phoneNumber: client.PhoneNumber);
+        Assert.That(() => _clientStorageContract.UpdElement(client), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _clientStorageContract.DelElement(client.Id);
+        var element = GetClientFromDatabase(client.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenHaveSalesByThisBuyer_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn(Guid.NewGuid().ToString());
+        var employeeId = Guid.NewGuid().ToString();
+        MagicCarpetDbContext.Employees.Add(new Employee() { Id = employeeId, FIO = "test", PostId = Guid.NewGuid().ToString(), Email = "abc@gmail.com" });
+        MagicCarpetDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+        MagicCarpetDbContext.Sales.Add(new Sale() { Id = Guid.NewGuid().ToString(), EmployeeId = employeeId, ClientId = client.Id, Sum = 10, DiscountType = DiscountType.None, Discount = 0 });
+        MagicCarpetDbContext.SaveChanges();
+        var salesBeforeDelete = MagicCarpetDbContext.Sales.Where(x => x.ClientId == client.Id).ToArray();
+        _clientStorageContract.DelElement(client.Id);
+        var element = GetClientFromDatabase(client.Id);
+        var salesAfterDelete = MagicCarpetDbContext.Sales.Where(x => x.ClientId == client.Id).ToArray();
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Null);
+            Assert.That(salesBeforeDelete, Has.Length.EqualTo(2));
+            Assert.That(salesAfterDelete, Is.Empty);
+            Assert.That(MagicCarpetDbContext.Sales.Count(), Is.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _clientStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Client InsertClientToDatabaseAndReturn(string id, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+    {
+        var client = new Client() { Id = id, FIO = fio, PhoneNumber = phoneNumber, DiscountSize = discountSize };
+        MagicCarpetDbContext.Clients.Add(client);
+        MagicCarpetDbContext.SaveChanges();
+        return client;
+    }
+
+    private static void AssertElement(ClientDataModel? actual, Client expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+            Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+        });
+    }
+
+    private static ClientDataModel CreateModel(string id, string fio = "test", string phoneNumber = "+7-777-777-77-77", double discountSize = 10)
+        => new(id, fio, phoneNumber, discountSize);
+
+    private Client? GetClientFromDatabase(string id) => MagicCarpetDbContext.Clients.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Client? actual, ClientDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.PhoneNumber, Is.EqualTo(expected.PhoneNumber));
+            Assert.That(actual.DiscountSize, Is.EqualTo(expected.DiscountSize));
+        });
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/EmployeeStorageContractTests.cs

@@ -0,0 +1,233 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+class EmployeeStorageContractTests : BaseStorageContractTest
+{
+    private EmployeeStorageContract _employeeStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _employeeStorageContract = new EmployeeStorageContract(MagicCarpetDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\"CASCADE; ");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com");
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com");
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com");
+        var list = _employeeStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), employee);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _employeeStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPostId_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", postId);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", postId);
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com");
+        var list = _employeeStorageContract.GetList(postId: postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.PostId == postId));
+    }
+
+    [Test]
+    public void Try_GetList_ByBirthDate_Test()
+    {
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-25));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-21));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-20));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-19));
+        var list = _employeeStorageContract.GetList(fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByEmploymentDate_Test()
+    {
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "abc@gmail.com", employmentDate: DateTime.UtcNow.AddDays(2));
+        var list = _employeeStorageContract.GetList(fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", "abc@gmail.com", postId, birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", "abc@gmail.com", postId, birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", "abc@gmail.com", postId, birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", "abc@gmail.com", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
+        var list = _employeeStorageContract.GetList(postId: postId, fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1), 
+            fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_employeeStorageContract.GetElementById(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _employeeStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_employeeStorageContract.GetElementByFIO(employee.FIO), employee);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        Assert.That(() => _employeeStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        _employeeStorageContract.AddElement(employee);
+        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id);
+        Assert.That(() => _employeeStorageContract.AddElement(employee), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString(), "New Fio");
+        InsertEmployeeToDatabaseAndReturn(employee.Id);
+        _employeeStorageContract.UpdElement(employee);
+        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _employeeStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _employeeStorageContract.UpdElement(employee), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _employeeStorageContract.DelElement(employee.Id);
+        var element = GetEmployeeFromDatabase(employee.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.IsDeleted);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _employeeStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
+    {
+        var employee = CreateModel(Guid.NewGuid().ToString());
+        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
+        Assert.That(() => _employeeStorageContract.DelElement(employee.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string id, string fio = "test", string email = "abc@mail.ru",string ? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false)
+    {
+        var employee = new Employee() { Id = id, FIO = fio, Email = email, PostId = postId ?? Guid.NewGuid().ToString(), BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20), EmploymentDate = employmentDate ?? DateTime.UtcNow, IsDeleted = isDeleted };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    private static void AssertElement(EmployeeDataModel? actual, Employee expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+
+    private static EmployeeDataModel CreateModel(string id, string fio = "fio", string email = "abc@mail.ru", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false) =>
+        new(id, fio, email, postId ?? Guid.NewGuid().ToString(), birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow,  isDeleted);
+
+    private Employee? GetEmployeeFromDatabase(string id) => MagicCarpetDbContext.Employees.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Employee? actual, EmployeeDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
+            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
+            Assert.That(actual.Email, Is.EqualTo(expected.Email));
+            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/SalaryStorageContractTests.cs

@@ -0,0 +1,153 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class SalaryStorageContractTests : BaseStorageContractTest
+{
+    private SalaryStorageContract _salaryStorageContract;
+    private Employee _employee;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract = new SalaryStorageContract(MagicCarpetDbContext);
+        _employee = InsertEmployeeToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Salaries\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var salary = InsertSalaryToDatabaseAndReturn(_employee.Id, employeeSalary: 100);
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), salary);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-10), DateTime.UtcNow.AddDays(10));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyInDatePeriod_Test()
+    {
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployee_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        InsertSalaryToDatabaseAndReturn(_employee.Id);
+        InsertSalaryToDatabaseAndReturn(employee.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployeeOnlyInDatePeriod_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(employee.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_employee.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-1), DateTime.UtcNow.AddDays(1), _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+        });
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var salary = CreateModel(_employee.Id);
+        _salaryStorageContract.AddElement(salary);
+        AssertElement(GetSalaryFromDatabaseByEmployeeId(_employee.Id), salary);
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string employeeFIO = "fio", string employeeEmail = "abc@mail.ru")
+    {
+        var employee = new Employee() { Id = Guid.NewGuid().ToString(), PostId = Guid.NewGuid().ToString(), FIO = employeeFIO, Email = employeeEmail, IsDeleted = false };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    private Salary InsertSalaryToDatabaseAndReturn(string employeeId, double employeeSalary = 1, DateTime? salaryDate = null)
+    {
+        var salary = new Salary() { EmployeeId = employeeId, EmployeeSalary = employeeSalary, SalaryDate = salaryDate ?? DateTime.UtcNow };
+        MagicCarpetDbContext.Salaries.Add(salary);
+        MagicCarpetDbContext.SaveChanges();
+        return salary;
+    }
+
+    private static void AssertElement(SalaryDataModel? actual, Salary expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.Salary, Is.EqualTo(expected.EmployeeSalary));
+        });
+    }
+
+    private static SalaryDataModel CreateModel(string employeeId, double employeeSalary = 1, DateTime? salaryDate = null)
+        => new(employeeId, salaryDate ?? DateTime.UtcNow, employeeSalary);
+
+    private Salary? GetSalaryFromDatabaseByEmployeeId(string id) => MagicCarpetDbContext.Salaries.FirstOrDefault(x => x.EmployeeId == id);
+
+    private static void AssertElement(Salary? actual, SalaryDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.EmployeeSalary, Is.EqualTo(expected.Salary));
+        });
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/SaleStorageContractTests.cs

@@ -0,0 +1,306 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class SaleStorageContractTests : BaseStorageContractTest
+{
+    private SaleStorageContract _saleStorageContract;
+    private Client _client;
+    private Employee _employee;
+    private Tour _tour;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _saleStorageContract = new SaleStorageContract(MagicCarpetDbContext);
+        _client = InsertClientToDatabaseAndReturn();
+        _employee = InsertEmployeeToDatabaseAndReturn();
+        _tour = InsertTourToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Sales\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Clients\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Tours\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 5)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(_tour.Id, 10)]);
+        var list = _saleStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _saleStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPeriod_Test()
+    {
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1));
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetList_ByEmployeeId_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn("Other employee");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(employeeId: _employee.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.EmployeeId == _employee.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByClientId_Test()
+    {
+        var client = InsertClientToDatabaseAndReturn("Other fio", "+8-888-888-88-88");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(clientId: _client.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.ClientId == _client.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByTourId_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn("Other name");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 5)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1), (tour.Id, 4)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, null, tours: [(tour.Id, 1), (_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(tourId: _tour.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        Assert.That(list.All(x => x.Tours.Any(y => y.TourId == _tour.Id)));
+    }
+
+    [Test]
+    public void Try_GetList_ByAllParameters_Test()
+    {
+        var employee = InsertEmployeeToDatabaseAndReturn("Other employee");
+        var client = InsertClientToDatabaseAndReturn("Other fio", "+8-888-888-88-88");
+        var tour = InsertTourToDatabaseAndReturn("Other name");
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(-1).AddMinutes(3), tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(tour.Id, 1)]);
+        InsertSaleToDatabaseAndReturn(employee.Id, null, saleDate: DateTime.UtcNow.AddDays(1).AddMinutes(-3), tours: [(_tour.Id, 1)]);
+        var list = _saleStorageContract.GetList(startDate: DateTime.UtcNow.AddDays(-1), endDate: DateTime.UtcNow.AddDays(1), employeeId: _employee.Id, clientId: _client.Id, tourId: tour.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(1));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        AssertElement(_saleStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)]);
+        Assert.That(() => _saleStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordHasCanceled_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: true);
+        AssertElement(_saleStorageContract.GetElementById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, false, [_tour.Id]);
+        _saleStorageContract.AddElement(sale);
+        AssertElement(GetSaleFromDatabaseById(sale.Id), sale);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenIsDeletedIsTrue_Test()
+    {
+        var sale = CreateModel(Guid.NewGuid().ToString(), _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, true, [_tour.Id]);
+        Assert.That(() => _saleStorageContract.AddElement(sale), Throws.Nothing);
+        AssertElement(GetSaleFromDatabaseById(sale.Id), CreateModel(sale.Id, _employee.Id, _client.Id, 1, DiscountType.RegularCustomer, 1, false, [_tour.Id]));
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: false);
+        _saleStorageContract.DelElement(sale.Id);
+        var element = GetSaleFromDatabaseById(sale.Id);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsCancel);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _saleStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasCanceled_Test()
+    {
+        var sale = InsertSaleToDatabaseAndReturn(_employee.Id, _client.Id, tours: [(_tour.Id, 1)], isCancel: true);
+        Assert.That(() => _saleStorageContract.DelElement(sale.Id), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    private Client InsertClientToDatabaseAndReturn(string fio = "test", string phoneNumber = "+7-777-777-77-77")
+    {
+        var client = new Client() { Id = Guid.NewGuid().ToString(), FIO = fio, PhoneNumber = phoneNumber, DiscountSize = 10 };
+        MagicCarpetDbContext.Clients.Add(client);
+        MagicCarpetDbContext.SaveChanges();
+        return client;
+    }
+
+    private Employee InsertEmployeeToDatabaseAndReturn(string fio = "test", string employeeEmail = "abc@gmail.com")
+    {
+        var employee = new Employee() { Id = Guid.NewGuid().ToString(), FIO = fio, Email = employeeEmail, PostId = Guid.NewGuid().ToString() };
+        MagicCarpetDbContext.Employees.Add(employee);
+        MagicCarpetDbContext.SaveChanges();
+        return employee;
+    }
+
+    private Tour InsertTourToDatabaseAndReturn(string tourName = "test", TourType tourType = TourType.Sightseeing, double price = 1)
+    {
+        var tour = new Tour() { Id = Guid.NewGuid().ToString(), TourName = tourName, TourType = tourType, Price = price };
+        MagicCarpetDbContext.Tours.Add(tour);
+        MagicCarpetDbContext.SaveChanges();
+        return tour;
+    }
+
+    private Sale InsertSaleToDatabaseAndReturn(string employeeId, string? clientId, DateTime? saleDate = null, double sum = 1, DiscountType discountType = DiscountType.OnSale, double discount = 0, bool isCancel = false, List<(string, int)>? tours = null)
+    {
+        var sale = new Sale() { EmployeeId = employeeId, ClientId = clientId, SaleDate = saleDate ?? DateTime.UtcNow, Sum = sum, DiscountType = discountType, Discount = discount, IsCancel = isCancel, SaleTours = [] };
+        if (tours is not null)
+        {
+            foreach (var elem in tours)
+            {
+                sale.SaleTours.Add(new SaleTour { TourId = elem.Item1, SaleId = sale.Id, Count = elem.Item2 });
+            }
+        }
+        MagicCarpetDbContext.Sales.Add(sale);
+        MagicCarpetDbContext.SaveChanges();
+        return sale;
+    }
+
+    private static void AssertElement(SaleDataModel? actual, Sale expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.ClientId, Is.EqualTo(expected.ClientId));
+            Assert.That(actual.DiscountType, Is.EqualTo(expected.DiscountType));
+            Assert.That(actual.Discount, Is.EqualTo(expected.Discount));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.SaleTours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.SaleTours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.SaleTours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.SaleTours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static SaleDataModel CreateModel(string id, string employeeId, string? clientId, double sum, DiscountType discountType, double discount, bool isCancel, List<string> tourIds)
+    {
+        var tours = tourIds.Select(x => new SaleTourDataModel(id, x, 1)).ToList();
+        return new(id, employeeId, clientId, sum, discountType, discount, isCancel, tours);
+    }
+
+    private Sale? GetSaleFromDatabaseById(string id) => MagicCarpetDbContext.Sales.Include(x => x.SaleTours).FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Sale? actual, SaleDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.EmployeeId, Is.EqualTo(expected.EmployeeId));
+            Assert.That(actual.ClientId, Is.EqualTo(expected.ClientId));
+            Assert.That(actual.DiscountType, Is.EqualTo(expected.DiscountType));
+            Assert.That(actual.Discount, Is.EqualTo(expected.Discount));
+            Assert.That(actual.IsCancel, Is.EqualTo(expected.IsCancel));
+        });
+
+        if (expected.Tours is not null)
+        {
+            Assert.That(actual.SaleTours, Is.Not.Null);
+            Assert.That(actual.SaleTours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.SaleTours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.SaleTours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.SaleTours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.SaleTours, Is.Null);
+        }
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/SuppliesStorageContractTests.cs

@@ -0,0 +1,191 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class SuppliesStorageContractTests : BaseStorageContractTest
+{
+    private SuppliesStorageContract _suppliesStorageContract;
+    private Tour _tour;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _suppliesStorageContract = new SuppliesStorageContract(MagicCarpetDbContext);
+        _tour = InsertTourToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Supplieses\" CASCADE;");
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Tours\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var supply = InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Ski, 5);
+        InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Ski, 5);
+        InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Ski, 5);
+        var list = _suppliesStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), supply);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _suppliesStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var supply = InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), TourType.Ski, 5);
+        AssertElement(_suppliesStorageContract.GetElementById(supply.Id), supply);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _suppliesStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var supply = CreateModel(Guid.NewGuid().ToString(), TourType.Ski, 5, [_tour.Id]);
+        _suppliesStorageContract.AddElement(supply);
+        AssertElement(GetSupplyFromDatabaseById(supply.Id), supply);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var supply = CreateModel(Guid.NewGuid().ToString(), TourType.Ski, 5, [_tour.Id]);
+        InsertSupplyToDatabaseAndReturn(supply.Id, TourType.Ski, 5, [(_tour.Id, 3)]);
+        Assert.That(() => _suppliesStorageContract.AddElement(supply), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var supply = CreateModel(Guid.NewGuid().ToString(), TourType.Ski, 5, [_tour.Id]);
+        InsertSupplyToDatabaseAndReturn(supply.Id, TourType.Ski, 5, null);
+        _suppliesStorageContract.UpdElement(supply);
+        AssertElement(GetSupplyFromDatabaseById(supply.Id), supply);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _suppliesStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString(), TourType.Ski, 5, [_tour.Id])), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Tour InsertTourToDatabaseAndReturn()
+    {
+        var tour = new Tour { Id = Guid.NewGuid().ToString(), TourName = "Test Tour", TourType = TourType.Ski };
+        MagicCarpetDbContext.Tours.Add(tour);
+        MagicCarpetDbContext.SaveChanges();
+        return tour;
+    }
+
+    private Supplies InsertSupplyToDatabaseAndReturn(string id, TourType type, int count, List<(string, int)>? tours = null)
+    {
+        var supply = new Supplies { Id = id, Type = type, ProductuionDate = DateTime.UtcNow, Count = count, Tours = [] };
+        if (tours is not null)
+        {
+            foreach (var elem in tours)
+            {
+                supply.Tours.Add(new TourSupplies { SuppliesId = supply.Id, TourId = elem.Item1, Count = elem.Item2 });
+            }
+        }
+        MagicCarpetDbContext.Supplieses.Add(supply);
+        MagicCarpetDbContext.SaveChanges();
+        return supply;
+    }
+
+    private static void AssertElement(SuppliesDataModel? actual, Supplies expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+            Assert.That(actual.ProductuionDate, Is.EqualTo(expected.ProductuionDate));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+        });
+        if (expected.Tours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static void AssertElement(Supplies? actual, SuppliesDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+            Assert.That(actual.ProductuionDate, Is.EqualTo(expected.ProductuionDate));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+        });
+        if (expected.Tours is not null)
+        {
+            Assert.That(actual.Tours, Is.Not.Null);
+            Assert.That(actual.Tours, Has.Count.EqualTo(expected.Tours.Count));
+            for (int i = 0; i < actual.Tours.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Tours[i].TourId, Is.EqualTo(expected.Tours[i].TourId));
+                    Assert.That(actual.Tours[i].Count, Is.EqualTo(expected.Tours[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Tours, Is.Null);
+        }
+    }
+
+    private static SuppliesDataModel CreateModel(string id, TourType type, int count, List<string> toursIds)
+    {
+        var tours = toursIds.Select(x => new TourSuppliesDataModel(id, x, 1)).ToList();
+        return new(id, type, DateTime.UtcNow, count, tours);
+    }
+
+
+    private Supplies? GetSupplyFromDatabaseById(string id)
+    {
+        return MagicCarpetDbContext.Supplieses.FirstOrDefault(x => x.Id == id);
+    }
+}

MagicCarpetProject/MagicCarpetTests/StoragesContractsTests/TourStorageContractTests.cs

@@ -0,0 +1,215 @@
+using MagicCarpetContracts.DataModels;
+using MagicCarpetContracts.Enums;
+using MagicCarpetContracts.Exceptions;
+using MagicCarpetDatabase.Implementations;
+using MagicCarpetDatabase.Models;
+using Microsoft.EntityFrameworkCore;
+using Moq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace MagicCarpetTests.StoragesContractsTests;
+
+[TestFixture]
+internal class TourStorageContractTests : BaseStorageContractTest
+{
+    private TourStorageContract _tourStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _tourStorageContract = new TourStorageContract(MagicCarpetDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Tours\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 2");
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 3");
+        var list = _tourStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == tour.Id), tour);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _tourStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetHistoryByTourId_WhenHaveRecords_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 20, DateTime.UtcNow.AddDays(-1));
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _tourStorageContract.GetHistoryByTourId(tour.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+    }
+
+    [Test]
+    public void Try_GetHistoryByTourId_WhenNoRecords_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1");
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 20, DateTime.UtcNow.AddDays(-1));
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 30, DateTime.UtcNow.AddMinutes(-10));
+        InsertTourHistoryToDatabaseAndReturn(tour.Id, 40, DateTime.UtcNow.AddDays(1));
+        var list = _tourStorageContract.GetHistoryByTourId(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_tourStorageContract.GetElementById(tour.Id), tour);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _tourStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_tourStorageContract.GetElementByName(tour.TourName), tour);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _tourStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var tour = CreateModel(Guid.NewGuid().ToString());
+        _tourStorageContract.AddElement(tour);
+        AssertElement(GetTourFromDatabaseById(tour.Id), tour);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var tour = CreateModel(Guid.NewGuid().ToString());
+        InsertTourToDatabaseAndReturn(tour.Id, tourName: "name unique");
+        Assert.That(() => _tourStorageContract.AddElement(tour), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var tour = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), tourName: tour.TourName);
+        Assert.That(() => _tourStorageContract.AddElement(tour), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var tour = CreateModel(Guid.NewGuid().ToString(), "new name", "country");
+        InsertTourToDatabaseAndReturn(tour.Id);
+        _tourStorageContract.UpdElement(tour);
+        AssertElement(GetTourFromDatabaseById(tour.Id), tour);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _tourStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var tour = CreateModel(Guid.NewGuid().ToString(), "name unique");
+        InsertTourToDatabaseAndReturn(tour.Id, tourName: "name");
+        InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString(), tourName: tour.TourName);
+        Assert.That(() => _tourStorageContract.UpdElement(tour), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var tour = InsertTourToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _tourStorageContract.DelElement(tour.Id);
+        var element = GetTourFromDatabaseById(tour.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _tourStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Tour InsertTourToDatabaseAndReturn(string id, string tourName = "test", string tourCountry = "country", TourType tourType = TourType.Beach, double price = 1)
+    {
+        var tour = new Tour() { Id = id, TourName = tourName, TourCountry = tourCountry, TourType = tourType, Price = price };
+        MagicCarpetDbContext.Tours.Add(tour);
+        MagicCarpetDbContext.SaveChanges();
+        return tour;
+    }
+
+    private TourHistory InsertTourHistoryToDatabaseAndReturn(string tourId, double price, DateTime changeDate)
+    {
+        var tourHistory = new TourHistory() { Id = Guid.NewGuid().ToString(), TourId = tourId, OldPrice = price, ChangeDate = changeDate };
+        MagicCarpetDbContext.TourHistories.Add(tourHistory);
+        MagicCarpetDbContext.SaveChanges();
+        return tourHistory;
+    }
+
+    private static void AssertElement(TourDataModel? actual, Tour expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.TourName, Is.EqualTo(expected.TourName));
+            Assert.That(actual.TourCountry, Is.EqualTo(expected.TourCountry));
+            Assert.That(actual.TourType, Is.EqualTo(expected.TourType));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+
+    private static TourDataModel CreateModel(string id, string tourName = "test", string tourCountry = "country", TourType type = TourType.Beach, double price = 1)
+        => new(id, tourName, tourCountry, price, type);
+
+    private Tour? GetTourFromDatabaseById(string id) => MagicCarpetDbContext.Tours.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Tour? actual, TourDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.TourName, Is.EqualTo(expected.TourName));
+            Assert.That(actual.TourCountry, Is.EqualTo(expected.TourCountry));
+            Assert.That(actual.TourType, Is.EqualTo(expected.TourType));
+            Assert.That(actual.Price, Is.EqualTo(expected.Price));
+        });
+    }
+}