правка проверки и списания компонент

FurnitureAssembly/FurnitureAssembly.sln

@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FurnitureAssemblyTests", "F
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FurnitureAssemblyBusinessLogic", "FurnitureAssemblyBusinessLogic\FurnitureAssemblyBusinessLogic.csproj", "{698BF48B-C9AC-4684-8150-52E8148F15A0}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FurnitureAssemblyDatebase", "FurnitureAssemblyDatebase\FurnitureAssemblyDatebase.csproj", "{BDE6EBBB-E735-408D-B34B-490C2AE9201B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{698BF48B-C9AC-4684-8150-52E8148F15A0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{698BF48B-C9AC-4684-8150-52E8148F15A0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{698BF48B-C9AC-4684-8150-52E8148F15A0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BDE6EBBB-E735-408D-B34B-490C2AE9201B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BDE6EBBB-E735-408D-B34B-490C2AE9201B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BDE6EBBB-E735-408D-B34B-490C2AE9201B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BDE6EBBB-E735-408D-B34B-490C2AE9201B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

FurnitureAssembly/FurnitureAssemblyBusinessLogic/Implementations/FurnitureBusinessLogicContract.cs

@@ -8,9 +8,10 @@ using System.Text.Json;
 
 namespace FurnitureAssemblyBusinessLogic.Implementations;
 
-internal class FurnitureBusinessLogicContract(IFurnitureStorageContract furnitureStorageContract, ILogger logger) : IFurnitureBusinessLogicContract
+internal class FurnitureBusinessLogicContract(IFurnitureStorageContract furnitureStorageContract, IWarehouseStorageContract warehouseStorageContract, ILogger logger) : IFurnitureBusinessLogicContract
 {
     IFurnitureStorageContract _furnitureStorageContract = furnitureStorageContract;
+    IWarehouseStorageContract _warehouseStorageContract = warehouseStorageContract;
     private readonly ILogger _logger = logger;
 
     public List<FurnitureDataModel> GetAllFurnitures()
@@ -38,6 +39,10 @@ internal class FurnitureBusinessLogicContract(IFurnitureStorageContract furnitur
         _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(furnitureDataModel));
         ArgumentNullException.ThrowIfNull(furnitureDataModel);
         furnitureDataModel.Validate();
+        if (!_warehouseStorageContract.CheckComponents(furnitureDataModel))
+        {
+            throw new InsufficientException("Dont have component in warehouse");
+        }
         _furnitureStorageContract.AddElement(furnitureDataModel);
     }
 
@@ -46,6 +51,10 @@ internal class FurnitureBusinessLogicContract(IFurnitureStorageContract furnitur
         _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(furnitureDataModel));
         ArgumentNullException.ThrowIfNull(furnitureDataModel);
         furnitureDataModel.Validate();
+        if (!_warehouseStorageContract.CheckComponents(furnitureDataModel))
+        {
+            throw new InsufficientException("Dont have component in warehouse");
+        }
         _furnitureStorageContract.UpdElement(furnitureDataModel);
     }
 

FurnitureAssembly/FurnitureAssemblyBusinessLogic/Implementations/SuppliesBusinessLogicContract.cs

@@ -0,0 +1,52 @@
+using FurnitureAssemblyContracts.BusinessLogicsContracts;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace FurnitureAssemblyBusinessLogic.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();      
+    }
+
+    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);      
+    }
+
+    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);
+    }
+}

FurnitureAssembly/FurnitureAssemblyBusinessLogic/Implementations/WarehouseBusinessLogicContract.cs

@@ -0,0 +1,65 @@
+using FurnitureAssemblyContracts.BusinessLogicsContracts;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using System.Text.Json;
+
+namespace FurnitureAssemblyBusinessLogic.Implementations;
+
+public class WarehouseBusinessLogicContract(IWarehouseStorageContract warehouseStorageContract, ILogger logger) : IWarehouseBusinessLogicContract
+{
+    private readonly IWarehouseStorageContract _warehouseStorageContract = warehouseStorageContract;
+    private readonly ILogger _logger = logger;
+    public List<WarehouseDataModel> GetAllComponents()
+    {
+        _logger.LogInformation("GetAllComponents");
+        return _warehouseStorageContract.GetList() ?? throw new NullListException();
+    }
+
+    public WarehouseDataModel 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 _warehouseStorageContract.GetElementById(data) ?? throw new ElementNotFoundException(data);
+    }
+
+    public void InsertComponent(WarehouseDataModel warehouseDataModel)
+    {
+        _logger.LogInformation("New data: {json}", JsonSerializer.Serialize(warehouseDataModel));
+        ArgumentNullException.ThrowIfNull(warehouseDataModel);
+        warehouseDataModel.Validate();
+        _warehouseStorageContract.AddElement(warehouseDataModel);
+    }
+
+    public void UpdateComponent(WarehouseDataModel warehouseDataModel)
+    {
+        _logger.LogInformation("Update data: {json}", JsonSerializer.Serialize(warehouseDataModel));
+        ArgumentNullException.ThrowIfNull(warehouseDataModel);
+        warehouseDataModel.Validate();
+        _warehouseStorageContract.UpdElement(warehouseDataModel);
+    }
+
+    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");
+        }
+        _warehouseStorageContract.DelElement(id);
+    }
+}

FurnitureAssembly/FurnitureAssemblyContracts/BusinessLogicsContracts/ISuppliesBusinessLogicContract.cs

@@ -0,0 +1,11 @@
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyContracts.BusinessLogicsContracts;
+
+public interface ISuppliesBusinessLogicContract
+{
+    List<SuppliesDataModel> GetAllComponents();
+    SuppliesDataModel GetComponentByData(string data);
+    void InsertComponent(SuppliesDataModel componentDataModel);
+    void UpdateComponent(SuppliesDataModel componentDataModel);
+}

FurnitureAssembly/FurnitureAssemblyContracts/BusinessLogicsContracts/IWarehouseBusinessLogicContract.cs

@@ -0,0 +1,12 @@
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyContracts.BusinessLogicsContracts;
+
+public interface IWarehouseBusinessLogicContract
+{
+    List<WarehouseDataModel> GetAllComponents();
+    WarehouseDataModel GetComponentByData(string data);
+    void InsertComponent(WarehouseDataModel warehouseDataModel);
+    void UpdateComponent(WarehouseDataModel warehouseDataModel);
+    void DeleteComponent(string id);
+}

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/ComponentDataModel.cs

@@ -5,13 +5,13 @@ using FurnitureAssemblyContracts.Infrastructure;
 
 namespace FurnitureAssemblyContracts.DataModels;
 
-public class ComponentDataModel(string id, string name, ComponentType componentType, string? prevName = null, string? prevPrevName = null) : IValidation
+public class ComponentDataModel(string id, string name, ComponentType type, string? prevName = null, string? prevPrevName = null) : IValidation
 {
     public string Id { get; private set; } = id;
     public string Name { get; private set; } = name;
     public string? PrevName { get; private set; } = prevName;
     public string? PrevPrevName { get; private set; } = prevPrevName;
-    public ComponentType Type { get; private set; } = componentType;
+    public ComponentType Type { get; private set; } = type;
 
     public void Validate()
     {

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/ComponentSuppliesDataModel.cs

@@ -0,0 +1,26 @@
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.Infrastructure;
+
+namespace FurnitureAssemblyContracts.DataModels;
+
+public class ComponentSuppliesDataModel(string suppliesId, string componentId, int count) : IValidation
+{
+    public string SuppliesId { get; private set; } = suppliesId;
+    public string ComponentId { get; private set; } = componentId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (SuppliesId.IsEmpty())
+            throw new ValidationException("Field FurnitureId is empty");
+        if (!SuppliesId.IsGuid())
+            throw new ValidationException("The value in the field FurnitureId is not a unique identifier");
+        if (ComponentId.IsEmpty())
+            throw new ValidationException("Field ComponentId is empty");
+        if (!ComponentId.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");
+    }
+}

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/ComponentWarehouseDataModel.cs

@@ -0,0 +1,26 @@
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.Infrastructure;
+
+namespace FurnitureAssemblyContracts.DataModels;
+
+public class ComponentWarehouseDataModel(string warehouseId, string componentId, int count) : IValidation
+{
+    public string WarehouseId { get; private set; } = warehouseId;
+    public string ComponentId { get; private set; } = componentId;
+    public int Count { get; private set; } = count;
+
+    public void Validate()
+    {
+        if (WarehouseId.IsEmpty())
+            throw new ValidationException("Field WarehouseId is empty");
+        if (!WarehouseId.IsGuid())
+            throw new ValidationException("The value in the field WarehouseId is not a unique identifier");
+        if (ComponentId.IsEmpty())
+            throw new ValidationException("Field ComponentId is empty");
+        if (!ComponentId.IsGuid())
+            throw new ValidationException("The value in the field ComponentId is not a unique identifier");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+    }
+}

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/PostDataModel.cs

@@ -5,9 +5,9 @@ using FurnitureAssemblyContracts.Infrastructure;
 
 namespace FurnitureAssemblyContracts.DataModels;
 
-public class PostDataModel(string id, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+public class PostDataModel(string postid, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
 {
-    public string Id { get; private set; } = id;
+    public string Id { get; private set; } = postid;
     public string PostName { get; private set; } = postName;
     public PostType PostType { get; private set; } = postType;
     public double Salary { get; private set; } = salary;

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/SuppliesDataModel.cs

@@ -0,0 +1,29 @@
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.Infrastructure;
+
+namespace FurnitureAssemblyContracts.DataModels;
+
+public class SuppliesDataModel(string id, ComponentType type, DateTime productuionDate, int count, List<ComponentSuppliesDataModel> components) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public ComponentType Type { get; private set; } = type;
+    public DateTime ProductuionDate { get; private set; } = productuionDate;
+    public int Count { get; private set; } = count;
+    public List<ComponentSuppliesDataModel> Components { get; private set; } = components;
+
+    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 == ComponentType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Components?.Count ?? 0) == 0)
+            throw new ValidationException("The component must include supplies");
+    }
+}

FurnitureAssembly/FurnitureAssemblyContracts/DataModels/WarehouseDataModel.cs

@@ -0,0 +1,28 @@
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.Extentions;
+using FurnitureAssemblyContracts.Infrastructure;
+
+namespace FurnitureAssemblyContracts.DataModels;
+
+public class WarehouseDataModel(string id, ComponentType type, int count, List<ComponentWarehouseDataModel> components) : IValidation
+{
+    public string Id { get; private set; } = id;
+    public ComponentType Type { get; private set; } = type;
+    public int Count { get; private set; } = count;
+    public List<ComponentWarehouseDataModel> Components { get; private set; } = components;
+
+    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 == ComponentType.None)
+            throw new ValidationException("Field Type is empty");
+        if (Count <= 0)
+            throw new ValidationException("Field Count is less than or equal to 0");
+        if ((Components?.Count ?? 0) == 0)
+            throw new ValidationException("The component must include supplies");
+    }
+}

FurnitureAssembly/FurnitureAssemblyContracts/Exceptions/ElementDeletedException.cs

@@ -0,0 +1,6 @@
+namespace FurnitureAssemblyContracts.Exceptions;
+
+public class ElementDeletedException : Exception
+{
+    public ElementDeletedException(string id) : base($"Cannot modify a deleted item(id: { id})") { }
+}

FurnitureAssembly/FurnitureAssemblyContracts/Exceptions/InsufficientException.cs

@@ -0,0 +1,5 @@
+namespace FurnitureAssemblyContracts.Exceptions;
+
+public class InsufficientException(string message) : Exception(message)
+{
+}

FurnitureAssembly/FurnitureAssemblyContracts/Infrastructure/IConfigurationDatabase.cs

@@ -0,0 +1,7 @@
+namespace FurnitureAssemblyContracts.Infrastructure;
+
+public interface IConfigurationDatabase
+{
+    string ConnectionString { get; }
+}
+

FurnitureAssembly/FurnitureAssemblyContracts/StoragesContracts/ISuppliesStorageContract.cs

@@ -0,0 +1,11 @@
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyContracts.StoragesContracts;
+
+public interface ISuppliesStorageContract
+{
+    List<SuppliesDataModel> GetList(DateTime? startDate = null);
+    SuppliesDataModel GetElementById(string id);
+    void AddElement(SuppliesDataModel suppliesDataModel);
+    void UpdElement(SuppliesDataModel suppliesDataModel);
+}

FurnitureAssembly/FurnitureAssemblyContracts/StoragesContracts/IWarehouseStorageContract.cs

@@ -0,0 +1,13 @@
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyContracts.StoragesContracts;
+
+public interface IWarehouseStorageContract
+{
+    List<WarehouseDataModel> GetList();
+    WarehouseDataModel GetElementById(string id);
+    void AddElement(WarehouseDataModel warehouseDataModel);
+    void UpdElement(WarehouseDataModel warehouseDataModel);
+    void DelElement(string id);
+    bool CheckComponents(FurnitureDataModel furnitureDataModel);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/FurnitureAssemblyDatebase.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</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="9.0.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\FurnitureAssemblyContracts\FurnitureAssemblyContracts.csproj" />
+  </ItemGroup>
+
+</Project>

FurnitureAssembly/FurnitureAssemblyDatebase/FurnitureAssemblyDbContext.cs

@@ -0,0 +1,60 @@
+using FurnitureAssemblyContracts.Infrastructure;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyDatebase;
+
+public class FurnitureAssemblyDbContext(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<Component>().HasIndex(x => x.Name).IsUnique();
+
+        modelBuilder.Entity<Furniture>().HasIndex(x => x.Name).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<ComponentSupplies>().HasKey(x => new { x.SuppliesId, x.ComponentId });
+
+        modelBuilder.Entity<ComponentWarehouse>().HasKey(x => new { x.WarehouseId, x.ComponentId });
+
+        modelBuilder.Entity<FurnitureComponent>().HasKey(x => new { x.FurnitureId, x.ComponentId });
+
+        modelBuilder.Entity<FurnitureComponent>()
+           .HasOne(fc => fc.Furniture)
+           .WithMany(f => f.Components)
+           .HasForeignKey(fc => fc.FurnitureId)
+           .OnDelete(DeleteBehavior.Restrict);
+    }
+
+    public DbSet<ManifacturingFurniture> Manufacturing { get; set; }
+    public DbSet<Post> Posts { get; set; }
+    public DbSet<Component> Components { get; set; }
+    public DbSet<Salary> Salaries { get; set; }
+    public DbSet<Furniture> Furnitures { get; set; }
+    public DbSet<FurnitureComponent> FurnitureComponents { get; set; }
+    public DbSet<Worker> Workers { get; set; }
+    public DbSet<Supplies> Supplieses { get; set; }
+    public DbSet<Warehouse> Warehouses { get; set; }
+    public DbSet<ComponentSupplies> ComponentSupplieses { get; set; }
+    public DbSet<ComponentWarehouse> ComponentWarehouses { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/ComponentStorageContract.cs

@@ -0,0 +1,159 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class ComponentStorageContract : IComponentStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public ComponentStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(Component));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<ComponentDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Components.Select(x => _mapper.Map<ComponentDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ComponentDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ComponentDataModel>(GetComponentById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ComponentDataModel? GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<ComponentDataModel>(_dbContext.Components.FirstOrDefault(x => x.Name == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ComponentDataModel? GetElementByOldName(string name)
+    {
+        try
+        {
+            return _mapper.Map<ComponentDataModel>(_dbContext.Components.FirstOrDefault(x =>
+                x.PrevName == name || x.PrevPrevName == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(ComponentDataModel manufacturerDataModel)
+    {
+        try
+        {
+            _dbContext.Components.Add(_mapper.Map<Component>(manufacturerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", manufacturerDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Components_Name" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Name", manufacturerDataModel.Name);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(ComponentDataModel manufacturerDataModel)
+    {
+        try
+        {
+            var element = GetComponentById(manufacturerDataModel.Id) ?? throw new ElementNotFoundException(manufacturerDataModel.Id);
+            if (element.Name != manufacturerDataModel.Name)
+            {
+                element.PrevPrevName = element.PrevName;
+                element.PrevName = element.Name;
+                element.Name = manufacturerDataModel.Name;
+            }
+            if (element.Type != manufacturerDataModel.Type)
+            {
+                element.Type = manufacturerDataModel.Type;
+            }
+            _dbContext.Components.Update(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Components_Name" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Name", manufacturerDataModel.Name);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetComponentById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Components.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Component? GetComponentById(string id) => _dbContext.Components.FirstOrDefault(x => x.Id == id);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/FurnitureStorageContract.cs

@@ -0,0 +1,136 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+
+namespace FurnitureAssemblyDatebase;
+
+public class FurnitureStorageContract : IFurnitureStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public FurnitureStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Furniture, FurnitureDataModel>();
+            cfg.CreateMap<FurnitureDataModel, Furniture>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<FurnitureDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Furnitures.Select(x => _mapper.Map<FurnitureDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public FurnitureDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<FurnitureDataModel>(GetFurnitureById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public FurnitureDataModel GetElementByName(string name)
+    {
+        try
+        {
+            return _mapper.Map<FurnitureDataModel>(_dbContext.Furnitures.FirstOrDefault(x => x.Name == name));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(FurnitureDataModel furnitureDataModel)
+    {
+        try
+        {
+            _dbContext.Furnitures.Add(_mapper.Map<Furniture>(furnitureDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", furnitureDataModel.Id);
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Furnitures_Name" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Name", furnitureDataModel.Name);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(FurnitureDataModel furnitureDataModel)
+    {
+        try
+        {
+            var element = GetFurnitureById(furnitureDataModel.Id) ?? throw new ElementNotFoundException(furnitureDataModel.Id);
+            _dbContext.Furnitures.Update(_mapper.Map(furnitureDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Furnitures_Name" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Name", furnitureDataModel.Name);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void DelElement(string id)
+    {
+        try
+        {
+            var element = GetFurnitureById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Furnitures.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private Furniture? GetFurnitureById(string id) => _dbContext.Furnitures.FirstOrDefault(x => x.Id == id);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/ManifacturingStorageContract.cs

@@ -0,0 +1,106 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class ManifacturingStorageContract : IManifacturingStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public ManifacturingStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<ManifacturingFurniture, ManifacturingFurnitureDataModel>();
+            cfg.CreateMap<ManifacturingFurnitureDataModel, ManifacturingFurniture>();
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<ManifacturingFurnitureDataModel> GetList(DateTime? startDate = null, DateTime? endDate = null, string? workerId = null, string? furnitureId = null)
+    {
+        try
+        {
+            var query = _dbContext.Manufacturing.AsQueryable();
+            if (startDate is not null && endDate is not null)
+            {
+                query = query.Where(x => x.ProductuionDate >= startDate && x.ProductuionDate < endDate);
+            }
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            if (furnitureId is not null)
+            {
+                query = query.Where(x => x.FurnitureId == furnitureId);
+            }
+            return [.. query.Select(x => _mapper.Map<ManifacturingFurnitureDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public ManifacturingFurnitureDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<ManifacturingFurnitureDataModel>(GetManifacturingById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(ManifacturingFurnitureDataModel manifacturingFurnitureDataModel)
+    {
+        try
+        {
+            _dbContext.Manufacturing.Add(_mapper.Map<ManifacturingFurniture>(manifacturingFurnitureDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(ManifacturingFurnitureDataModel manifacturingFurnitureDataModel)
+    {
+        try
+        {
+            var element = GetManifacturingById(manifacturingFurnitureDataModel.Id) ?? throw new ElementNotFoundException(manifacturingFurnitureDataModel.Id);
+            _dbContext.Manufacturing.Update(_mapper.Map(manifacturingFurnitureDataModel, element));
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Manifacturing_Id" })
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("PostId", manifacturingFurnitureDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    private ManifacturingFurniture? GetManifacturingById(string id) => _dbContext.Manufacturing.FirstOrDefault(x => x.Id == id);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/PostStorageContract.cs

@@ -0,0 +1,192 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+using Npgsql;
+using System.Xml.Linq;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class PostStorageContract : IPostStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public PostStorageContract(FurnitureAssemblyDbContext 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 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 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 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();
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/SalaryStorageContract.cs

@@ -0,0 +1,56 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class SalaryStorageContract : ISalaryStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SalaryStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Salary, SalaryDataModel>();
+            cfg.CreateMap<SalaryDataModel, Salary>()
+                .ForMember(dest => dest.WorkerSalary, opt => opt.MapFrom(src => src.Salary));
+        });
+        _mapper = new Mapper(config);
+    }
+    public List<SalaryDataModel> GetList(DateTime startDate, DateTime endDate, string? workerId = null)
+    {
+        try
+        {
+            var query = _dbContext.Salaries.Where(x => x.SalaryDate >= startDate && x.SalaryDate <= endDate);
+            if (workerId is not null)
+            {
+                query = query.Where(x => x.WorkerId == workerId);
+            }
+            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);
+        }
+    }   
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/SuppliesStorageContract.cs

@@ -0,0 +1,84 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class SuppliesStorageContract : ISuppliesStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public SuppliesStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(Supplies));
+        });
+        _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);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/WarehouseStorageContract.cs

@@ -0,0 +1,134 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class WarehouseStorageContract : IWarehouseStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public WarehouseStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.AddMaps(typeof(Warehouse));
+        });
+        _mapper = new Mapper(config);
+    }
+
+    public List<WarehouseDataModel> GetList()
+    {
+        try
+        {
+            return [.. _dbContext.Warehouses.Select(x => _mapper.Map<WarehouseDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public WarehouseDataModel GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<WarehouseDataModel>(GetWarehouseById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(WarehouseDataModel warehouseDataModel)
+    {
+        try
+        {
+            _dbContext.Warehouses.Add(_mapper.Map<Warehouse>(warehouseDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(WarehouseDataModel warehouseDataModel)
+    {
+        try
+        {
+            var element = GetWarehouseById(warehouseDataModel.Id) ?? throw new ElementNotFoundException(warehouseDataModel.Id);
+            _dbContext.Warehouses.Update(_mapper.Map(warehouseDataModel, 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 = GetWarehouseById(id) ?? throw new ElementNotFoundException(id);
+            _dbContext.Warehouses.Remove(element);
+            _dbContext.SaveChanges();
+        }
+        catch (ElementNotFoundException)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw;
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public bool CheckComponents(FurnitureDataModel furnitureDataModel)
+    {
+        using (var transaction = _dbContext.Database.BeginTransaction())
+        {
+            foreach (FurnitureComponentDataModel furniture_component in furnitureDataModel.Components)
+            {
+                var component = _dbContext.Components.FirstOrDefault(x => x.Id == furniture_component.ComponentId);
+                var warehouse = _dbContext.Warehouses.FirstOrDefault(x => x.Type == component.Type && x.Count >= furniture_component.Count);
+
+                if (warehouse == null)
+                {
+                    transaction.Rollback();
+                    return false;
+                }
+                if (warehouse.Count - furniture_component.Count == 0)
+                {
+                    DelElement(warehouse.Id);
+                }
+                else
+                {
+                    warehouse.Count -= furniture_component.Count;
+                }
+            }
+            transaction.Commit();
+            _dbContext.SaveChanges();
+            return true;
+        }
+    }
+
+    private Warehouse? GetWarehouseById(string id) => _dbContext.Warehouses.FirstOrDefault(x => x.Id == id);  
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Implementations/WorkerStorageContract.cs

@@ -0,0 +1,143 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using FurnitureAssemblyDatebase.Models;
+
+namespace FurnitureAssemblyDatebase.Implementations;
+
+public class WorkerStorageContract : IWorkerStorageContract
+{
+    private readonly FurnitureAssemblyDbContext _dbContext;
+    private readonly Mapper _mapper;
+
+    public WorkerStorageContract(FurnitureAssemblyDbContext dbContext)
+    {
+        _dbContext = dbContext;
+        var config = new MapperConfiguration(cfg =>
+        {
+            cfg.CreateMap<Worker, WorkerDataModel>();
+            cfg.CreateMap<WorkerDataModel, Worker>();
+        }); 
+        _mapper = new Mapper(config);
+    }
+
+    public List<WorkerDataModel> GetList(bool onlyActive = true, string? postId = null, DateTime? fromBirthDate = null, DateTime? toBirthDate = null, DateTime? fromEmploymentDate = null, DateTime? toEmploymentDate = null)
+    {
+        try
+        {
+            var query = _dbContext.Workers.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<WorkerDataModel>(x))];
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public WorkerDataModel? GetElementById(string id)
+    {
+        try
+        {
+            return _mapper.Map<WorkerDataModel>(GetWorkerById(id));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public WorkerDataModel? GetElementByFIO(string fio)
+    {
+        try
+        {
+            return
+            _mapper.Map<WorkerDataModel>(_dbContext.Workers.FirstOrDefault(x => x.FIO == fio));
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void AddElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            _dbContext.Workers.Add(_mapper.Map<Worker>(workerDataModel));
+            _dbContext.SaveChanges();
+        }
+        catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new ElementExistsException("Id", workerDataModel.Id);
+        }
+        catch (Exception ex)
+        {
+            _dbContext.ChangeTracker.Clear();
+            throw new StorageException(ex);
+        }
+    }
+
+    public void UpdElement(WorkerDataModel workerDataModel)
+    {
+        try
+        {
+            var element = GetWorkerById(workerDataModel.Id) ?? throw new ElementNotFoundException(workerDataModel.Id);
+            _dbContext.Workers.Update(_mapper.Map(workerDataModel, 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 = GetWorkerById(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 Worker? GetWorkerById(string id) => _dbContext.Workers.FirstOrDefault(x => x.Id == id && !x.IsDeleted);
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Component.cs

@@ -0,0 +1,22 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+[AutoMap(typeof(ComponentDataModel), ReverseMap = true)]
+public class Component
+{
+    public required string Id { get; set; }
+    public required string Name { get; set; }
+    public string? PrevName { get; set; }    
+    public string? PrevPrevName { get; set; }
+    public required ComponentType Type { get; set; }
+    [ForeignKey("ComponentId")]
+    public List<FurnitureComponent>? FurnitureComponents { get; set; }
+    [ForeignKey("SuppliesesId")]
+    public List<ComponentSupplies>? ComponentSupplies { get; set; }
+    [ForeignKey("WarehousesId")]
+    public List<ComponentWarehouse>? ComponentWarehouse { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/ComponentSupplies.cs

@@ -0,0 +1,14 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+[AutoMap(typeof(ComponentSuppliesDataModel), ReverseMap = true)]
+public class ComponentSupplies
+{
+    public required string SuppliesId { get; set; }
+    public required string ComponentId { get; set; }
+    public int Count { get; set; }
+    public Supplies? Supplies { get; set; }
+    public Component? Components { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/ComponentWarehouse.cs

@@ -0,0 +1,14 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+[AutoMap(typeof(ComponentWarehouseDataModel), ReverseMap = true)]
+public class ComponentWarehouse
+{
+    public required string WarehouseId { get; set; }
+    public required string ComponentId { get; set; }
+    public int Count { get; set; }
+    public Warehouse? Warehouses { get; set; }
+    public Component? Components { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Furniture.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+public class Furniture
+{
+    public required string Id { get; set; }
+    public required string Name { get; set; }
+    public int Weight { get; set; }
+    [ForeignKey("FurnitureId")]
+    public List<FurnitureComponent>? Components { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/FurnitureComponent.cs

@@ -0,0 +1,10 @@
+namespace FurnitureAssemblyDatebase.Models;
+
+public class FurnitureComponent
+{
+    public required string FurnitureId { get; set; }
+    public required string ComponentId { get; set; }
+    public int Count { get; set; }
+    public Furniture? Furniture { get; set; }
+    public Component? Component { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/ManifacturingFurniture.cs

@@ -0,0 +1,12 @@
+namespace FurnitureAssemblyDatebase.Models;
+
+public class ManifacturingFurniture
+{
+    public required string Id { get; set; }
+    public required string FurnitureId { get; set; }
+    public int Count { get; set; }
+    public DateTime ProductuionDate { get; set; }
+    public required string WorkerId { get; set ; }
+    public Furniture? Furniture { get; set; }
+    public Worker? Worker { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Post.cs

@@ -0,0 +1,14 @@
+using FurnitureAssemblyContracts.Enums;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+public class Post
+{
+    public 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; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Salary.cs

@@ -0,0 +1,10 @@
+namespace FurnitureAssemblyDatebase.Models;
+
+public class Salary
+{
+    public string Id { get; set; } = Guid.NewGuid().ToString();
+    public required string WorkerId { get; set; }
+    public double WorkerSalary { get; set; }
+    public DateTime SalaryDate { get; set; }
+    public Worker? Worker { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Supplies.cs

@@ -0,0 +1,18 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+[AutoMap(typeof(SuppliesDataModel), ReverseMap = true)]
+public class Supplies
+{
+    public required string Id { get; set; }
+    public required ComponentType Type { get; set; }
+    public DateTime ProductuionDate { get; set; }
+    public required int Count { get; set; }
+
+    [ForeignKey("SuppliesId")]
+    public List<ComponentSupplies>? Components { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Warehouse.cs

@@ -0,0 +1,17 @@
+using AutoMapper;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+[AutoMap(typeof(WarehouseDataModel), ReverseMap = true)]
+public class Warehouse
+{
+    public required string Id { get; set; }
+    public required ComponentType Type { get; set; }
+    public required int Count { get; set; }
+
+    [ForeignKey("WarehouseId")]
+    public List<ComponentWarehouse>? Components { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyDatebase/Models/Worker.cs

@@ -0,0 +1,19 @@
+using FurnitureAssemblyContracts.Enums;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FurnitureAssemblyDatebase.Models;
+
+public class Worker
+{
+    public required string Id { get; set; }
+    public required string FIO { get; set; }
+    public required string PostId { get; set; }
+    public DateTime BirthDate { get; set; }
+    public DateTime EmploymentDate { get; set; }
+    public bool IsDeleted { get; set; }
+    public DateTime ChangeDate { get; set; }
+    [ForeignKey("WorkerId")]
+    public List<Salary>? Salaries { get; set; }
+    [ForeignKey("WorkerId")]
+    public List<ManifacturingFurniture>? ManifacturingFurniture { get; set; }
+}

FurnitureAssembly/FurnitureAssemblyTests/BusinessLogicContractsTests/FurnitureBusinessLogicContractTests.cs

@@ -11,18 +11,21 @@ namespace FurnitureAssemblyTests.BusinessLogicContractsTests;
 public class FurnitureBusinessLogicContractTests
 {
     private IFurnitureBusinessLogicContract _furnitureBusinessLogicContract;
+    private Mock<IWarehouseStorageContract> _warehouseStorageContract;
     private Mock<IFurnitureStorageContract> _furnitureStorageContract;
 
     [OneTimeSetUp]
     public void OneTimeSetUp()
     {
         _furnitureStorageContract = new Mock<IFurnitureStorageContract>();
-        _furnitureBusinessLogicContract = new FurnitureBusinessLogicContract(_furnitureStorageContract.Object, new Mock<ILogger>().Object);
+        _warehouseStorageContract = new Mock<IWarehouseStorageContract>();
+        _furnitureBusinessLogicContract = new FurnitureBusinessLogicContract(_furnitureStorageContract.Object, _warehouseStorageContract.Object, new Mock<ILogger>().Object);
     }
 
     [TearDown]
     public void TearDown()
     {
+        _warehouseStorageContract.Reset();
         _furnitureStorageContract.Reset();
     }
 
@@ -154,6 +157,7 @@ public class FurnitureBusinessLogicContractTests
         //Arrange
         var flag = false;
         var record = new FurnitureDataModel(Guid.NewGuid().ToString(), "name", 10, [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.AddElement(It.IsAny<FurnitureDataModel>())).Callback((FurnitureDataModel x) =>
         {
             flag = x.Id == record.Id && x.Name == record.Name;
@@ -161,6 +165,7 @@ public class FurnitureBusinessLogicContractTests
         //Act
         _furnitureBusinessLogicContract.InsertFurniture(record);
         //Assert
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.AddElement(It.IsAny<FurnitureDataModel>()), Times.Once); 
         Assert.That(flag);
     }
@@ -169,10 +174,12 @@ public class FurnitureBusinessLogicContractTests
     public void InsertFurnitures_RecordWithExistsData_ThrowException_Test()
     {
         //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.AddElement(It.IsAny<FurnitureDataModel>())).Throws(new ElementExistsException("Data", "Data"));
         //Act&Assert
         Assert.That(() => _furnitureBusinessLogicContract.InsertFurniture(new(Guid.NewGuid().ToString(), "name", 10, 
             [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.AddElement(It.IsAny<FurnitureDataModel>()), Times.Once);
     }
 
@@ -197,19 +204,34 @@ public class FurnitureBusinessLogicContractTests
     public void InsertFurnitures_StorageThrowError_ThrowException_Test()
     {
         //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.AddElement(It.IsAny<FurnitureDataModel>())).Throws(new StorageException(new InvalidOperationException()));
         //Act&Assert
         Assert.That(() => _furnitureBusinessLogicContract.InsertFurniture(new(Guid.NewGuid().ToString(), "name", 10, 
             [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.AddElement(It.IsAny<FurnitureDataModel>()), Times.Once);
     }
 
+    [Test]
+    public void InsertFurniture_InsufficientError_ThrowException_Test()
+    {
+        //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(false);
+        Assert.That(() => _furnitureBusinessLogicContract.InsertFurniture(new FurnitureDataModel(Guid.NewGuid().ToString(), "name", 10,
+            [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<InsufficientException>());
+        //Act&Assert
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
+        _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Never);
+    }
+
     [Test]
     public void UpdateFurnitures_CorrectRecord_Test()
     {
         //Arrange
         var flag = false;
         var record = new FurnitureDataModel(Guid.NewGuid().ToString(), "name", 10, [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.UpdElement(It.IsAny<FurnitureDataModel>())).Callback((FurnitureDataModel x) =>
         {
             flag = x.Id == record.Id && x.Name == record.Name;
@@ -217,6 +239,7 @@ public class FurnitureBusinessLogicContractTests
         //Act
         _furnitureBusinessLogicContract.UpdateFurniture(record);
         //Assert
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Once);
         Assert.That(flag);
     }
@@ -225,10 +248,12 @@ public class FurnitureBusinessLogicContractTests
     public void UpdateFurnitures_RecordWithIncorrectData_ThrowException_Test()
     {
         //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.UpdElement(It.IsAny<FurnitureDataModel>())).Throws(new ElementNotFoundException(""));
         //Act&Assert
         Assert.That(() => _furnitureBusinessLogicContract.UpdateFurniture(new(Guid.NewGuid().ToString(), "name", 10, 
             [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementNotFoundException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Once);
     }
 
@@ -236,10 +261,12 @@ public class FurnitureBusinessLogicContractTests
     public void UpdateFurnitures_RecordWithExistsData_ThrowException_Test()
     {
         //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.UpdElement(It.IsAny<FurnitureDataModel>())).Throws(new ElementExistsException("Data", "Data"));
         //Act&Assert
         Assert.That(() => _furnitureBusinessLogicContract.UpdateFurniture(new(Guid.NewGuid().ToString(), "name", 10, 
             [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Once);
     }
 
@@ -264,13 +291,27 @@ public class FurnitureBusinessLogicContractTests
     public void UpdateFurnitures_StorageThrowError_ThrowException_Test()
     {
         //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(true);
         _furnitureStorageContract.Setup(x => x.UpdElement(It.IsAny<FurnitureDataModel>())).Throws(new StorageException(new InvalidOperationException()));
         //Act&Assert
         Assert.That(() => _furnitureBusinessLogicContract.UpdateFurniture(new(Guid.NewGuid().ToString(), "name", 10, 
             [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(),5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
         _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Once);
     }
 
+    [Test]
+    public void UpdateFurniture_InsufficientError_ThrowException_Test()
+    {
+        //Arrange
+        _warehouseStorageContract.Setup(x => x.CheckComponents(It.IsAny<FurnitureDataModel>())).Returns(false);
+        //Act&Assert
+        Assert.That(() => _furnitureBusinessLogicContract.UpdateFurniture(new(Guid.NewGuid().ToString(), "name", 10,
+            [new FurnitureComponentDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<InsufficientException>());
+        _warehouseStorageContract.Verify(x => x.CheckComponents(It.IsAny<FurnitureDataModel>()), Times.Once);
+        _furnitureStorageContract.Verify(x => x.UpdElement(It.IsAny<FurnitureDataModel>()), Times.Never);
+    }
+
     [Test]
     public void DeleteFurnitures_CorrectRecord_Test()
     {

FurnitureAssembly/FurnitureAssemblyTests/BusinessLogicContractsTests/SuppliesBusinessLogicContractTests.cs

@@ -0,0 +1,238 @@
+using FurnitureAssemblyBusinessLogic.Implementations;
+using FurnitureAssemblyContracts.BusinessLogicsContracts;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace FurnitureAssemblyTests.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(), ComponentType.Panel, DateTime.Now, 1, []),
+            new(Guid.NewGuid().ToString(), ComponentType.Panel, DateTime.Now, 1, []),
+            new(Guid.NewGuid().ToString(), ComponentType.Panel, 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, ComponentType.Panel, 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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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", ComponentType.Panel, 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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(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(), ComponentType.Panel, 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(), ComponentType.Panel, DateTime.Now, 1,
+            [new ComponentSuppliesDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _suppliesStorageContract.Verify(x => x.UpdElement(It.IsAny<SuppliesDataModel>()), Times.Once);
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/BusinessLogicContractsTests/WarehouseBusinessLogicContractTests.cs

@@ -0,0 +1,291 @@
+using FurnitureAssemblyBusinessLogic.Implementations;
+using FurnitureAssemblyContracts.BusinessLogicsContracts;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyContracts.StoragesContracts;
+using Microsoft.Extensions.Logging;
+using Moq;
+
+namespace FurnitureAssemblyTests.BusinessLogicContractsTests;
+
+[TestFixture]
+internal class WarehouseBusinessLogicContractTests
+{
+    private IWarehouseBusinessLogicContract _warehouseBusinessLogicContract;
+    private Mock<IWarehouseStorageContract> _warehouseStorageContract;
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _warehouseStorageContract = new Mock<IWarehouseStorageContract>();
+        _warehouseBusinessLogicContract = new WarehouseBusinessLogicContract(_warehouseStorageContract.Object, new Mock<ILogger>().Object);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        _warehouseStorageContract.Reset();
+    }
+
+    public void GetAllSupplies_ReturnListOfRecords_Test()
+    {
+        // Arrange
+        var listOriginal = new List<WarehouseDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), ComponentType.Panel, 1, []),
+            new(Guid.NewGuid().ToString(), ComponentType.Panel, 1, []),
+            new(Guid.NewGuid().ToString(), ComponentType.Panel, 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<WarehouseDataModel>)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 WarehouseDataModel(id, ComponentType.Panel, 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 WarehouseDataModel(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<WarehouseDataModel>()));
+        // Act
+        _warehouseBusinessLogicContract.InsertComponent(record);
+        // Assert
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<WarehouseDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void InsertSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<WarehouseDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<WarehouseDataModel>()), 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<WarehouseDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new WarehouseDataModel("id", ComponentType.Panel, 1, [])), Throws.TypeOf<ValidationException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<WarehouseDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void InsertSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.AddElement(It.IsAny<WarehouseDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.InsertComponent(new(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.AddElement(It.IsAny<WarehouseDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_CorrectRecord_Test()
+    {
+        // Arrange
+        var record = new WarehouseDataModel(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<WarehouseDataModel>()));
+        // Act
+        _warehouseBusinessLogicContract.UpdateComponent(record);
+        // Assert
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<WarehouseDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithIncorrectData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<WarehouseDataModel>())).Throws(new ElementNotFoundException(""));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementNotFoundException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<WarehouseDataModel>()), Times.Once);
+    }
+
+    [Test]
+    public void UpdateSupplies_RecordWithExistsData_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<WarehouseDataModel>())).Throws(new ElementExistsException("Data", "Data"));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<WarehouseDataModel>()), 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<WarehouseDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateComponents_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new WarehouseDataModel(Guid.NewGuid().ToString(), ComponentType.Panel, 1, [])), Throws.TypeOf<ValidationException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<WarehouseDataModel>()), Times.Never);
+    }
+
+    [Test]
+    public void UpdateSupplies_StorageThrowError_ThrowException_Test()
+    {
+        // Arrange
+        _warehouseStorageContract.Setup(x => x.UpdElement(It.IsAny<WarehouseDataModel>())).Throws(new StorageException(new InvalidOperationException()));
+        // Act & Assert
+        Assert.That(() => _warehouseBusinessLogicContract.UpdateComponent(new(Guid.NewGuid().ToString(), ComponentType.Panel, 1,
+            [new ComponentWarehouseDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _warehouseStorageContract.Verify(x => x.UpdElement(It.IsAny<WarehouseDataModel>()), 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);
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/DataModelsTests/ComponentDataModelTests.cs

@@ -29,7 +29,7 @@ internal class ComponentDataModelTests
     {
         var component = CreateDataModel(Guid.NewGuid().ToString(), null, ComponentType.Box);
         Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
-        component = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,  ComponentType.Box);
+        component = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ComponentType.Box);
         Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
     }
 
@@ -40,6 +40,7 @@ internal class ComponentDataModelTests
         Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
     }
 
+
     [Test]
     public void AllFieldsIsCorrectTest()
     {

FurnitureAssembly/FurnitureAssemblyTests/DataModelsTests/ComponentSuppliesDataModelTests.cs

@@ -0,0 +1,70 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+
+namespace FurnitureAssemblyTests.DataModelsTests;
+
+[TestFixture]
+internal class ComponentSuppliesDataModelTests
+{
+    [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 ComponentIdIsNullOrEmptyTest()
+    {
+        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 ComponentIdIsNotGuidTest()
+    {
+        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 componentId = Guid.NewGuid().ToString();
+        var count = 1;
+        var model = CreateDataModel(suppliesId, componentId, count);
+        Assert.That(() => model.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.SuppliesId, Is.EqualTo(suppliesId));
+            Assert.That(model.ComponentId, Is.EqualTo(componentId));
+            Assert.That(model.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static ComponentSuppliesDataModel CreateDataModel(string? suppliesId, string? componentId, int count) 
+        => new(suppliesId, componentId, count);
+}

FurnitureAssembly/FurnitureAssemblyTests/DataModelsTests/ComponentWarehouseDataModelTests.cs

@@ -0,0 +1,70 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+
+namespace FurnitureAssemblyTests.DataModelsTests;
+
+[TestFixture]
+internal class ComponentWarehouseDataModelTests
+{
+    [Test]
+    public void WarehouseIdIsNullOrEmptyTest()
+    {
+        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 WarehouseIdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", Guid.NewGuid().ToString(), 1);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNullOrEmptyTest()
+    {
+        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 ComponentIdIsNotGuidTest()
+    {
+        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 warehouseId = Guid.NewGuid().ToString();
+        var componentId = Guid.NewGuid().ToString();
+        var count = 1;
+        var model = CreateDataModel(componentId, componentId, count);
+        Assert.That(() => model.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(model.WarehouseId, Is.EqualTo(componentId));
+            Assert.That(model.ComponentId, Is.EqualTo(componentId));
+            Assert.That(model.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static ComponentWarehouseDataModel CreateDataModel(string? warehouseId, string? componentId, int count)
+        => new(warehouseId, componentId, count);
+}

FurnitureAssembly/FurnitureAssemblyTests/DataModelsTests/SuppliesDataModelTest.cs

@@ -0,0 +1,77 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+
+namespace FurnitureAssemblyTests.DataModelsTests;
+
+[TestFixture]
+public class SuppliesDataModelTest
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, ComponentType.Handle, DateTime.Now, 1, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(string.Empty, ComponentType.Handle, DateTime.Now, 1, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", ComponentType.Handle, DateTime.Now, 1, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TypeIsNoneTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, DateTime.Now, 1, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, DateTime.Now, 0, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, DateTime.Now, -1, CreateSuppliesDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SuppliesIsEmptyOrNullTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, DateTime.Now, 0, []);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, DateTime.Now, 0, null);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var type = ComponentType.Handle;
+        var date = DateTime.Now;
+        var count = 1;
+        var supplies = CreateSuppliesDataModel();
+        var model = CreateDataModel(id, type, date, count, supplies);
+        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.Components, Is.EqualTo(supplies));
+        });
+    }
+
+    private static SuppliesDataModel CreateDataModel(string? id, ComponentType type, DateTime date, int count, List<ComponentSuppliesDataModel> supplies)
+            => new(id, type, date, count, supplies);
+    private static List<ComponentSuppliesDataModel> CreateSuppliesDataModel()
+                => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

FurnitureAssembly/FurnitureAssemblyTests/DataModelsTests/WorkhouseDataModelTests.cs

@@ -0,0 +1,75 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+
+namespace FurnitureAssemblyTests.DataModelsTests;
+
+[TestFixture]
+internal class WorkhouseDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var model = CreateDataModel(null, ComponentType.Handle, 1, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+        model = CreateDataModel(string.Empty, ComponentType.Handle, 1, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var model = CreateDataModel("id", ComponentType.Handle, 1, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void TypeIsNoneTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, 1, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, 0, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, -1, CreateWarehouseDataModel());
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkhouseIsEmptyOrNullTest()
+    {
+        var model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, 0, []);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+
+        model = CreateDataModel(Guid.NewGuid().ToString(), ComponentType.None, 0, null);
+        Assert.That(() => model.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var id = Guid.NewGuid().ToString();
+        var type = ComponentType.Handle;
+        var count = 1;
+        var warehouse = CreateWarehouseDataModel();
+        var model = CreateDataModel(id, type, count, warehouse);
+        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.Components, Is.EqualTo(warehouse));
+        });
+    }
+
+    private static WarehouseDataModel CreateDataModel(string? id, ComponentType type, int count, List<ComponentWarehouseDataModel> warehouse)
+        => new WarehouseDataModel(id, type, count, warehouse);
+    private static List<ComponentWarehouseDataModel> CreateWarehouseDataModel()
+                => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

FurnitureAssembly/FurnitureAssemblyTests/FurnitureAssemblyTests.csproj

@@ -20,6 +20,7 @@
   <ItemGroup>
     <ProjectReference Include="..\FurnitureAssemblyBusinessLogic\FurnitureAssemblyBusinessLogic.csproj" />
     <ProjectReference Include="..\FurnitureAssemblyContracts\FurnitureAssemblyContracts.csproj" />
+    <ProjectReference Include="..\FurnitureAssemblyDatebase\FurnitureAssemblyDatebase.csproj" />
   </ItemGroup>
 
   <ItemGroup>

FurnitureAssembly/FurnitureAssemblyTests/Infrastructure/ConfigurationDateBaseTest.cs

@@ -0,0 +1,8 @@
+using FurnitureAssemblyContracts.Infrastructure;
+
+namespace FurnitureAssemblyTests.Infrastructure;
+
+public class ConfigurationDateBaseTest : IConfigurationDatabase
+{
+    public string ConnectionString => "Host=127.0.0.1;Port=5432;Database=furnitureassemblytest;";
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/BaseStorageContractTest.cs

@@ -0,0 +1,24 @@
+using FurnitureAssemblyDatebase;
+using FurnitureAssemblyTests.Infrastructure;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+internal abstract class BaseStorageContractTest
+{
+    protected FurnitureAssemblyDbContext FurnitureAssemblyDbContext { get; private set; }
+
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        FurnitureAssemblyDbContext = new FurnitureAssemblyDbContext(new ConfigurationDateBaseTest());
+        FurnitureAssemblyDbContext.Database.EnsureDeleted();
+        FurnitureAssemblyDbContext.Database.EnsureCreated();
+    }
+
+    [OneTimeTearDown]
+    public void OneTimeTearDown()
+    {
+        FurnitureAssemblyDbContext.Database.EnsureDeleted();
+        FurnitureAssemblyDbContext.Dispose();
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/ComponentStorageContractTests.cs

@@ -0,0 +1,202 @@
+using Castle.Components.DictionaryAdapter.Xml;
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class ComponentStorageContractTests : BaseStorageContractTest
+{
+    private ComponentStorageContract _componentStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _componentStorageContract = new ComponentStorageContract(FurnitureAssemblyDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Components\" CASCADE; ");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "Component 1");
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "Component 2");
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "Component 3");
+        var list = _componentStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), component);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _componentStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_componentStorageContract.GetElementById(component.Id), component);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _componentStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "Unique Name");
+        AssertElement(_componentStorageContract.GetElementByName(component.Name), component);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _componentStorageContract.GetElementByName("Non-existent Name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByOldName_WhenHaveRecord_Test()
+    {
+        var component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "Current Name", ComponentType.Panel, "Previous Name", "Old Name");
+        AssertElement(_componentStorageContract.GetElementByOldName(component.PrevName!), component);
+        AssertElement(_componentStorageContract.GetElementByOldName(component.PrevPrevName!), component);
+    }
+
+    [Test]
+    public void Try_GetElementByOldName_WhenNoRecord_Test()
+    {
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _componentStorageContract.GetElementByOldName("Non-existent Old Name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "New Component");
+        _componentStorageContract.AddElement(component);
+        AssertElement(GetComponentFromDatabase(component.Id), component);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "Unique Name");
+        InsertComponentToDatabaseAndReturn(component.Id);
+        Assert.That(() => _componentStorageContract.AddElement(component), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "Duplicate Name");
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), component.Name);
+        Assert.That(() => _componentStorageContract.AddElement(component), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "Old Name", ComponentType.Panel, "Previous Name", "Old Name");
+        InsertComponentToDatabaseAndReturn(component.Id, name: component.Name!, type: component.Type!, prevName: component.PrevName!, prevPrevName: component.PrevPrevName!);
+        _componentStorageContract.UpdElement(component);
+        AssertElement(GetComponentFromDatabase(component.Id), component);
+ 
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoChangeName_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "Same Name", ComponentType.Panel, "Previous Name", "Old Name");
+        InsertComponentToDatabaseAndReturn(component.Id, component.Name, component.Type, component.PrevName, component.PrevPrevName);
+        _componentStorageContract.UpdElement(component);
+        AssertElement(GetComponentFromDatabase(component.Id), component);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _componentStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var component = CreateModel(Guid.NewGuid().ToString(), "Duplicate Name");
+        InsertComponentToDatabaseAndReturn(component.Id, "Old Name");
+        InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), component.Name);
+        Assert.That(() => _componentStorageContract.UpdElement(component), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _componentStorageContract.DelElement(component.Id);
+        var element = GetComponentFromDatabase(component.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _componentStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Component InsertComponentToDatabaseAndReturn(string id, string name = "test", ComponentType type = ComponentType.Panel, string prevName = "prevname", string prevPrevName = "prevprevname")
+    {
+        var component = new Component { Id = id, Name = name, Type = type, PrevName = prevName, PrevPrevName = prevPrevName };
+        FurnitureAssemblyDbContext.Components.Add(component);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return component;
+    }
+
+    private static void AssertElement(ComponentDataModel? actual, Component expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Name, Is.EqualTo(expected.Name));
+            Assert.That(actual.PrevName, Is.EqualTo(expected.PrevName));
+            Assert.That(actual.PrevPrevName, Is.EqualTo(expected.PrevPrevName));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+        });
+    }
+
+    private static ComponentDataModel CreateModel(string id, string name = "test", ComponentType type = ComponentType.Panel, string prevName = "prevname", string prevPrevName = "prevprevname")
+        => new(id, name, type, prevName, prevPrevName);
+
+    private Component? GetComponentFromDatabase(string id) => FurnitureAssemblyDbContext.Components.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Component? actual, ComponentDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Name, Is.EqualTo(expected.Name));
+            Assert.That(actual.PrevName, Is.EqualTo(expected.PrevName));
+            Assert.That(actual.PrevPrevName, Is.EqualTo(expected.PrevPrevName));
+            Assert.That(actual.Type, Is.EqualTo(expected.Type));
+        });
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/FurnitureStorageContractTests.cs

@@ -0,0 +1,178 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class FurnitureStorageContractTests : BaseStorageContractTest
+{
+    private FurnitureStorageContract _furnitureStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _furnitureStorageContract = new FurnitureStorageContract(FurnitureAssemblyDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Furnitures\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var furniture = InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), "Furniture 1");
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), "Furniture 2");
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), "Furniture 3");
+        var list = _furnitureStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), furniture);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _furnitureStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var furniture = InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_furnitureStorageContract.GetElementById(furniture.Id), furniture);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _furnitureStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var furniture = InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), "Unique Name");
+        AssertElement(_furnitureStorageContract.GetElementByName(furniture.Name), furniture);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _furnitureStorageContract.GetElementByName("Non-existent Name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "New Furniture");
+        _furnitureStorageContract.AddElement(furniture);
+        AssertElement(GetFurnitureFromDatabase(furniture.Id), furniture);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "Unique Name");
+        InsertFurnitureToDatabaseAndReturn(furniture.Id);
+        Assert.That(() => _furnitureStorageContract.AddElement(furniture), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "Duplicate Name");
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), furniture.Name);
+        Assert.That(() => _furnitureStorageContract.AddElement(furniture), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "Old Name");
+        InsertFurnitureToDatabaseAndReturn(furniture.Id, name: furniture.Name!);
+        _furnitureStorageContract.UpdElement(furniture);
+        AssertElement(GetFurnitureFromDatabase(furniture.Id), furniture);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoChangeName_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "Same Name");
+        InsertFurnitureToDatabaseAndReturn(furniture.Id, furniture.Name);
+        _furnitureStorageContract.UpdElement(furniture);
+        AssertElement(GetFurnitureFromDatabase(furniture.Id), furniture);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _furnitureStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var furniture = CreateModel(Guid.NewGuid().ToString(), "Duplicate Name");
+        InsertFurnitureToDatabaseAndReturn(furniture.Id, "Old Name");
+        InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString(), furniture.Name);
+        Assert.That(() => _furnitureStorageContract.UpdElement(furniture), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var furniture = InsertFurnitureToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _furnitureStorageContract.DelElement(furniture.Id);
+        var element = GetFurnitureFromDatabase(furniture.Id);
+        Assert.That(element, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _furnitureStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Furniture InsertFurnitureToDatabaseAndReturn(string id, string name = "test")
+    {
+        var furniture = new Furniture { Id = id, Name = name };
+        FurnitureAssemblyDbContext.Furnitures.Add(furniture);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return furniture;
+    }
+
+    private static void AssertElement(FurnitureDataModel? actual, Furniture expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Name, Is.EqualTo(expected.Name));
+        });
+    }
+
+    private static FurnitureDataModel CreateModel(string id, string name = "test", int weight = 0)
+        => new(id, name, weight, []);
+
+    private Furniture? GetFurnitureFromDatabase(string id) => FurnitureAssemblyDbContext.Furnitures.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Furniture? actual, FurnitureDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.Name, Is.EqualTo(expected.Name));
+        });
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/ManifacturingStorageContractTests.cs

@@ -0,0 +1,178 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class ManifacturingStorageContractTests : BaseStorageContractTest
+{
+    private ManifacturingStorageContract _manifacturingStorageContract;
+    private Worker _worker;
+    private Furniture _furniture;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _manifacturingStorageContract = new ManifacturingStorageContract(FurnitureAssemblyDbContext);
+        _worker = InsertWorkerToDatabaseAndReturn();
+        _furniture = InsertFurnitureToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Furnitures\" CASCADE;");
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Manufacturing\" CASCADE;");
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Workers\" CASCADE;");    
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var manufacturing = InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        var list = _manifacturingStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), manufacturing);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _manifacturingStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByWorker_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn("Other worker");
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, worker.Id);
+        var list = _manifacturingStorageContract.GetList(workerId: _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.WorkerId == _worker.Id));
+    }
+
+    [Test]
+    public void Try_GetList_ByFurniture_Test()
+    {
+        var furniture = InsertFurnitureToDatabaseAndReturn("Other furniture");
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), furniture.Id, 5, _worker.Id);
+        var list = _manifacturingStorageContract.GetList(furnitureId: _furniture.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+        Assert.That(list.All(x => x.FurnitureId == _furniture.Id));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var manufacturing = InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        AssertElement(_manifacturingStorageContract.GetElementById(manufacturing.Id), manufacturing);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertManufacturingToDatabaseAndReturn(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        Assert.That(() => _manifacturingStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var manufacturing = CreateModel(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        _manifacturingStorageContract.AddElement(manufacturing);
+        AssertElement(GetManufacturingFromDatabaseById(manufacturing.Id), manufacturing);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var manufacturing = CreateModel(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(manufacturing.Id, _furniture.Id, 5, _worker.Id);
+        Assert.That(() => _manifacturingStorageContract.AddElement(manufacturing), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var manufacturing = CreateModel(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id);
+        InsertManufacturingToDatabaseAndReturn(manufacturing.Id, _furniture.Id, 5, _worker.Id);
+        _manifacturingStorageContract.UpdElement(manufacturing);
+        AssertElement(GetManufacturingFromDatabaseById(manufacturing.Id), manufacturing);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _manifacturingStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString(), _furniture.Id, 5, _worker.Id)), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Worker InsertWorkerToDatabaseAndReturn(string workerFIO = "fio")
+    {
+        var worker = new Worker() { Id = Guid.NewGuid().ToString(), PostId = Guid.NewGuid().ToString(), FIO = workerFIO, IsDeleted = false };
+        FurnitureAssemblyDbContext.Workers.Add(worker);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return worker;
+    }
+
+    private Furniture InsertFurnitureToDatabaseAndReturn(string furnitureName = "furniture", int weight = 5)
+    {
+        var furniture = new Furniture() { Id = Guid.NewGuid().ToString(), Name = furnitureName, Weight = weight };
+        FurnitureAssemblyDbContext.Furnitures.Add(furniture);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return furniture;
+    }
+
+    private ManifacturingFurniture InsertManufacturingToDatabaseAndReturn(string id, string furnitureId, int count, string workerId)
+    {
+        var manufacturing = new ManifacturingFurniture() { Id = id, FurnitureId = furnitureId, Count = count, WorkerId = workerId };
+        FurnitureAssemblyDbContext.Manufacturing.Add(manufacturing);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return manufacturing;
+    }
+
+    private static void AssertElement(ManifacturingFurnitureDataModel? actual, ManifacturingFurniture expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+            Assert.That(actual.FurnitureId, Is.EqualTo(expected.FurnitureId));
+        });
+    }
+
+    private static ManifacturingFurnitureDataModel CreateModel(string id, string furnitureId, int count, string workerId)
+    {
+        return new(id, furnitureId, count, workerId);
+    }
+
+    private ManifacturingFurniture? GetManufacturingFromDatabaseById(string id) =>
+        FurnitureAssemblyDbContext.Manufacturing.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(ManifacturingFurniture? actual, ManifacturingFurnitureDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.Id));
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.Count, Is.EqualTo(expected.Count));
+            Assert.That(actual.FurnitureId, Is.EqualTo(expected.FurnitureId));
+        });
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/PostStorageContractTests.cs

@@ -0,0 +1,337 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class PostStorageContractTests : BaseStorageContractTest
+{
+    private PostStorageContract _postStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _postStorageContract = new PostStorageContract(FurnitureAssemblyDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Posts\"CASCADE; ");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(),
+        "name 1");
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 2");
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 3");
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(x => x.Id == post.PostId), post);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _postStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_OnlyActual_Test()
+    {
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1", isActual: true);
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 2", isActual: true);
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 3", isActual: false);
+        var list = _postStorageContract.GetList(onlyActual: true);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(!list.Any(x => !x.IsActual));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_IncludeNoActual_Test()
+    {
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1", isActual: true);
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 2", isActual: true);
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 3", isActual: false);
+        var list = _postStorageContract.GetList(onlyActual: false);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(3));
+            Assert.That(list.Count(x => x.IsActual), Is.EqualTo(2));
+            Assert.That(list.Count(x => !x.IsActual), Is.EqualTo(1));
+        });
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenHaveRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1", isActual: true);
+        InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(postId);
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2));
+    }
+
+    [Test]
+    public void Try_GetPostWithHistory_WhenNoRecords_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), "name 1", isActual: true);
+        InsertPostToDatabaseAndReturn(postId, "name 2", isActual: true);
+        InsertPostToDatabaseAndReturn(postId, "name 2", isActual: false);
+        var list = _postStorageContract.GetPostWithHistory(Guid.NewGuid().ToString());
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_postStorageContract.GetElementById(post.PostId), post);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _postStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenRecordHasDeleted_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostId), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenTrySearchById_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _postStorageContract.GetElementById(post.Id), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenHaveRecord_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_postStorageContract.GetElementByName(post.PostName),
+        post);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenNoRecord_Test()
+    {
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString());
+        Assert.That(() => _postStorageContract.GetElementByName("name"), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByName_WhenRecordHasDeleted_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: false);
+        Assert.That(() => _postStorageContract.GetElementById(post.PostName), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), isActual: true);
+        _postStorageContract.AddElement(post);
+        AssertElement(GetPostFromDatabaseByPostId(post.Id), post);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenActualIsFalse_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), isActual: false);
+        Assert.That(() => _postStorageContract.AddElement(post),
+        Throws.Nothing);
+        AssertElement(GetPostFromDatabaseByPostId(post.Id),
+        CreateModel(post.Id, isActual: true));
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "name unique", isActual: true);
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), postName: post.PostName, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post),
+        Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void
+    Try_AddElement_WhenHaveRecordWithSamePostIdAndActualIsTrue_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), isActual: true);
+        InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        Assert.That(() => _postStorageContract.AddElement(post),
+        Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        _postStorageContract.UpdElement(post);
+        var posts = FurnitureAssemblyDbContext.Posts.Where(x => x.PostId == post.Id).OrderByDescending(x => x.ChangeDate);
+        Assert.That(posts.Count(), Is.EqualTo(2));
+        AssertElement(posts.First(), CreateModel(post.Id, isActual: true));
+        AssertElement(posts.Last(), CreateModel(post.Id, isActual: false));
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenActualIsFalse_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), isActual: false);
+        InsertPostToDatabaseAndReturn(post.Id, isActual: true);
+        _postStorageContract.UpdElement(post);
+        AssertElement(GetPostFromDatabaseByPostId(post.Id),
+        CreateModel(post.Id, isActual: true));
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())),
+        Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenHaveRecordWithSameName_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString(), "New Name");
+        InsertPostToDatabaseAndReturn(post.Id, postName: "name");
+        InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), postName: post.PostName);
+        Assert.That(() => _postStorageContract.UpdElement(post),
+        Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenRecordWasDeleted_Test()
+    {
+        var post = CreateModel(Guid.NewGuid().ToString());
+        InsertPostToDatabaseAndReturn(post.Id, isActual: false);
+        Assert.That(() => _postStorageContract.UpdElement(post), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: true);
+        _postStorageContract.DelElement(post.PostId);
+        var element = GetPostFromDatabaseByPostId(post.PostId);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(!element!.IsActual);
+        });
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordWasDeleted_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: false);
+        Assert.That(() => _postStorageContract.DelElement(post.PostId), Throws.TypeOf<ElementDeletedException>());
+    }
+
+    [Test]
+    public void Try_ResElement_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: false);
+        _postStorageContract.ResElement(post.PostId);
+        var element = GetPostFromDatabaseByPostId(post.PostId);
+        Assert.Multiple(() =>
+        {
+            Assert.That(element, Is.Not.Null);
+            Assert.That(element!.IsActual);
+        });
+    }
+
+    [Test]
+    public void Try_ResElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _postStorageContract.ResElement(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_ResElement_WhenRecordNotWasDeleted_Test()
+    {
+        var post = InsertPostToDatabaseAndReturn(Guid.NewGuid().ToString(), isActual: true);
+        Assert.That(() => _postStorageContract.ResElement(post.PostId), Throws.Nothing);
+    }
+
+    private Post InsertPostToDatabaseAndReturn(string id, string postName = "test", PostType postType = PostType.Builder, double salary = 10, bool isActual = true, DateTime? changeDate = null)
+    {
+        var post = new Post()
+        {
+            Id = Guid.NewGuid().ToString(),
+            PostId = id,
+            PostName = postName,
+            PostType = postType,
+            Salary = salary,
+            IsActual = isActual,
+            ChangeDate = changeDate ?? DateTime.UtcNow
+        };
+        FurnitureAssemblyDbContext.Posts.Add(post);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return post;
+    }
+
+    private static void AssertElement(PostDataModel? actual, Post expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.Id, Is.EqualTo(expected.PostId));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName)); Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+            Assert.That(actual.IsActual, Is.EqualTo(expected.IsActual));
+        });
+    }
+
+    private static PostDataModel CreateModel(string postId, string postName = "test", PostType postType = PostType.Builder, double salary = 10, bool isActual = false, DateTime? changeDate = null)
+        => new(postId, postName, postType, salary, isActual, changeDate ?? DateTime.UtcNow);
+
+    private Post? GetPostFromDatabaseByPostId(string id) => FurnitureAssemblyDbContext.Posts
+        .Where(x => x.PostId == id).OrderByDescending(x => x.ChangeDate).FirstOrDefault();
+
+    private static void AssertElement(Post? actual, PostDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.PostId, Is.EqualTo(expected.Id));
+            Assert.That(actual.PostName, Is.EqualTo(expected.PostName));
+            Assert.That(actual.PostType, Is.EqualTo(expected.PostType));
+            Assert.That(actual.Salary, Is.EqualTo(expected.Salary));
+            Assert.That(actual.IsActual, Is.EqualTo(expected.IsActual));
+        });
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/SalaryStorageContractTests.cs

@@ -0,0 +1,168 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyDatebase;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class SalaryStorageContractTests : BaseStorageContractTest
+{
+    private SalaryStorageContract _salaryStorageContract;
+    private Worker _worker;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract = new SalaryStorageContract(FurnitureAssemblyDbContext);
+        _worker = InsertWorkerToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Salaries\"CASCADE; ");
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Workers\"CASCADE; ");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var salary = InsertSalaryToDatabaseAndReturn(_worker.Id, workerSalary: 100);
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(_worker.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(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate: DateTime.UtcNow.AddDays(1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.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_ByWorker_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(_worker.Id);
+        InsertSalaryToDatabaseAndReturn(worker.Id);
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-
+        1), DateTime.UtcNow.AddDays(1), _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.WorkerId == _worker.Id));
+        });
+    }
+
+    [Test]
+    public void Try_GetList_ByWorkerOnlyInDatePeriod_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn("name 2");
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(-2));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(-1).AddMinutes(5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(1).AddMinutes(-5));
+        InsertSalaryToDatabaseAndReturn(_worker.Id, salaryDate:
+        DateTime.UtcNow.AddDays(-2));
+        var list = _salaryStorageContract.GetList(DateTime.UtcNow.AddDays(-
+        1), DateTime.UtcNow.AddDays(1), _worker.Id);
+        Assert.That(list, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(list, Has.Count.EqualTo(2));
+            Assert.That(list.All(x => x.WorkerId == _worker.Id));
+        });
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var salary = CreateModel(_worker.Id);
+        _salaryStorageContract.AddElement(salary);
+        AssertElement(GetSalaryFromDatabaseByWorkerId(_worker.Id), salary);
+    }
+
+    private Worker InsertWorkerToDatabaseAndReturn(string workerFIO = "fio")
+    {
+        var worker = new Worker()
+        {
+            Id = Guid.NewGuid().ToString(),
+            PostId = Guid.NewGuid().ToString(),
+            FIO = workerFIO,
+            IsDeleted = false
+        };
+        FurnitureAssemblyDbContext.Workers.Add(worker);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return worker;
+    }
+
+    private Salary InsertSalaryToDatabaseAndReturn(string workerId, double
+    workerSalary = 1, DateTime? salaryDate = null)
+    {
+        var salary = new Salary()
+        {
+            WorkerId = workerId,
+            WorkerSalary = workerSalary,
+            SalaryDate = salaryDate ?? DateTime.UtcNow
+        };
+        FurnitureAssemblyDbContext.Salaries.Add(salary);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return salary;
+    }
+
+    private static void AssertElement(SalaryDataModel? actual, Salary expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.Salary, Is.EqualTo(expected.WorkerSalary));
+        });
+    }
+    private static SalaryDataModel CreateModel(string workerId, double workerSalary = 1, DateTime? salaryDate = null)
+                    => new(workerId, salaryDate ?? DateTime.UtcNow, workerSalary);
+
+    private Salary? GetSalaryFromDatabaseByWorkerId(string id) => FurnitureAssemblyDbContext.Salaries.FirstOrDefault(x => x.WorkerId == id);
+
+    private static void AssertElement(Salary? actual, SalaryDataModel expected)
+    {
+        Assert.That(actual, Is.Not.Null);
+        Assert.Multiple(() =>
+        {
+            Assert.That(actual.WorkerId, Is.EqualTo(expected.WorkerId));
+            Assert.That(actual.WorkerSalary, Is.EqualTo(expected.Salary));
+        });
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/SuppliesStorageContractTests.cs

@@ -0,0 +1,187 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using FurnitureAssemblyDatebase;
+using Microsoft.EntityFrameworkCore;
+using FurnitureAssemblyContracts.Enums;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class SuppliesStorageContractTests : BaseStorageContractTest
+{
+    private SuppliesStorageContract _suppliesStorageContract;
+    private Component _component;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _suppliesStorageContract = new SuppliesStorageContract(FurnitureAssemblyDbContext);
+        _component = InsertComponentToDatabaseAndReturn();
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Supplieses\" CASCADE;");
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Components\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var supply = InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        InsertSupplyToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 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(), ComponentType.Handle, 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(), ComponentType.Handle, 5, [_component.Id]);
+        _suppliesStorageContract.AddElement(supply);
+        AssertElement(GetSupplyFromDatabaseById(supply.Id), supply);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var supply = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        InsertSupplyToDatabaseAndReturn(supply.Id, ComponentType.Handle, 5, [(_component.Id, 3)]);
+        Assert.That(() => _suppliesStorageContract.AddElement(supply), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var supply = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        InsertSupplyToDatabaseAndReturn(supply.Id, ComponentType.Legs, 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(), ComponentType.Handle, 5, [_component.Id])), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Component InsertComponentToDatabaseAndReturn()
+    {
+        var component = new Component { Id = Guid.NewGuid().ToString(), Name = "Test Component", Type = ComponentType.Panel };
+        FurnitureAssemblyDbContext.Components.Add(component);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return component;
+    }
+
+    private Supplies InsertSupplyToDatabaseAndReturn(string id, ComponentType type, int count, List<(string, int)>? components = null)
+    {
+        var supply = new Supplies { Id = id, Type = type, ProductuionDate = DateTime.UtcNow, Count = count, Components = [] };
+        if (components is not null)
+        {
+            foreach (var elem in components)
+            {
+                supply.Components.Add(new ComponentSupplies { SuppliesId = supply.Id, ComponentId = elem.Item1, Count = elem.Item2 });
+            }
+        }
+        FurnitureAssemblyDbContext.Supplieses.Add(supply);
+        FurnitureAssemblyDbContext.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.Components is not null)
+        {
+            Assert.That(actual.Components, Is.Not.Null);
+            Assert.That(actual.Components, Has.Count.EqualTo(expected.Components.Count));
+            for (int i = 0; i < actual.Components.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Components[i].ComponentId, Is.EqualTo(expected.Components[i].ComponentId));
+                    Assert.That(actual.Components[i].Count, Is.EqualTo(expected.Components[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Components, 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.Components is not null)
+        {
+            Assert.That(actual.Components, Is.Not.Null);
+            Assert.That(actual.Components, Has.Count.EqualTo(expected.Components.Count));
+            for (int i = 0; i < actual.Components.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Components[i].ComponentId, Is.EqualTo(expected.Components[i].ComponentId));
+                    Assert.That(actual.Components[i].Count, Is.EqualTo(expected.Components[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Components, Is.Null);
+        }
+    }
+
+    private static SuppliesDataModel CreateModel(string id, ComponentType type, int count, List<string> componentsIds)
+    {
+        var components = componentsIds.Select(x => new ComponentSuppliesDataModel(id, x, 1)).ToList();
+        return new(id, type, DateTime.UtcNow, count, components);
+    }
+    
+
+    private Supplies? GetSupplyFromDatabaseById(string id)
+    {
+        return FurnitureAssemblyDbContext.Supplieses.FirstOrDefault(x => x.Id == id);
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/WarehouseStorageContractTests.cs

@@ -0,0 +1,209 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Enums;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+internal class WarehouseStorageContractTests : BaseStorageContractTest
+{
+    private WarehouseStorageContract _warehouseStorageContract;
+    private Component _component;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _warehouseStorageContract = new WarehouseStorageContract(FurnitureAssemblyDbContext);
+        _component = InsertComponentToDatabaseAndReturn(Guid.NewGuid().ToString(), "name", ComponentType.Panel);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Warehouses\" CASCADE;");
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Components\" CASCADE;");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var warehouse = InsertWarehouseToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        InsertWarehouseToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        InsertWarehouseToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        var list = _warehouseStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), warehouse);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _warehouseStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenHaveRecord_Test()
+    {
+        var warehouse = InsertWarehouseToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        var result = _warehouseStorageContract.GetElementById(warehouse.Id);
+        AssertElement(result, warehouse);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _warehouseStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenValidData_Test()
+    {
+        var warehouse = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        _warehouseStorageContract.AddElement(warehouse);
+        var result = GetWarehouseFromDatabaseById(warehouse.Id);
+        AssertElement(result, warehouse);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var warehouse = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        InsertWarehouseToDatabaseAndReturn(warehouse.Id, ComponentType.Handle, 5, [(_component.Id, 3)]);
+        Assert.That(() => _warehouseStorageContract.AddElement(warehouse), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_AddElement_WhenNoHaveComponent_Test()
+    {
+        var warehouse = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 0, [_component.Id]);
+        InsertWarehouseToDatabaseAndReturn(warehouse.Id, ComponentType.Handle, 5, [(_component.Id, 3)]);
+        Assert.That(() => _warehouseStorageContract.AddElement(warehouse), Throws.TypeOf<StorageException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenValidData_Test()
+    {
+        var warehouse = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        InsertWarehouseToDatabaseAndReturn(warehouse.Id, ComponentType.Legs, 10, null);
+        _warehouseStorageContract.UpdElement(warehouse);
+        var result = GetWarehouseFromDatabaseById(warehouse.Id);
+        AssertElement(result, warehouse);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        var warehouse = CreateModel(Guid.NewGuid().ToString(), ComponentType.Handle, 5, [_component.Id]);
+        Assert.That(() => _warehouseStorageContract.UpdElement(warehouse), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordExists_Test()
+    {
+        var warehouse = InsertWarehouseToDatabaseAndReturn(Guid.NewGuid().ToString(), ComponentType.Handle, 5);
+        _warehouseStorageContract.DelElement(warehouse.Id);
+        var result = GetWarehouseFromDatabaseById(warehouse.Id);
+        Assert.That(result, Is.Null);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenRecordDoesNotExist_ThrowsElementNotFoundException()
+    {
+        Assert.That(() => _warehouseStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Component InsertComponentToDatabaseAndReturn(string id, string name, ComponentType type)
+    {
+        var component = new Component { Id = id, Name = name, Type = type };
+        FurnitureAssemblyDbContext.Components.Add(component);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return component;
+    }
+
+    private Warehouse InsertWarehouseToDatabaseAndReturn(string id, ComponentType type, int count, List<(string, int)>? components = null)
+    {
+        var warehouse = new Warehouse { Id = id, Type = type, Count = count, Components = [] };
+        if (components is not null)
+        {
+            foreach (var elem in components)
+            {
+                warehouse.Components.Add(new ComponentWarehouse { WarehouseId = warehouse.Id, ComponentId = elem.Item1, Count = elem.Item2 });
+            }
+        }
+        FurnitureAssemblyDbContext.Warehouses.Add(warehouse);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return warehouse;
+    }
+
+    private static void AssertElement(WarehouseDataModel? actual, Warehouse 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.Components is not null)
+        {
+            Assert.That(actual.Components, Is.Not.Null);
+            Assert.That(actual.Components, Has.Count.EqualTo(expected.Components.Count));
+            for (int i = 0; i < actual.Components.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Components[i].ComponentId, Is.EqualTo(expected.Components[i].ComponentId));
+                    Assert.That(actual.Components[i].Count, Is.EqualTo(expected.Components[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Components, Is.Null);
+        }
+    }
+
+    private static void AssertElement(Warehouse? actual, WarehouseDataModel 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.Components is not null)
+        {
+            Assert.That(actual.Components, Is.Not.Null);
+            Assert.That(actual.Components, Has.Count.EqualTo(expected.Components.Count));
+            for (int i = 0; i < actual.Components.Count; ++i)
+            {
+                Assert.Multiple(() =>
+                {
+                    Assert.That(actual.Components[i].ComponentId, Is.EqualTo(expected.Components[i].ComponentId));
+                    Assert.That(actual.Components[i].Count, Is.EqualTo(expected.Components[i].Count));
+                });
+            }
+        }
+        else
+        {
+            Assert.That(actual.Components, Is.Null);
+        }
+    }
+
+    private static WarehouseDataModel CreateModel(string id, ComponentType type, int count, List<string> componentsIds)
+    {
+        var components = componentsIds.Select(x => new ComponentWarehouseDataModel(id, x, 1)).ToList();
+        return new(id, type, count, components);
+    }
+
+    private Warehouse? GetWarehouseFromDatabaseById(string id)
+    {
+        return FurnitureAssemblyDbContext.Warehouses.FirstOrDefault(x => x.Id == id);
+    }
+}

FurnitureAssembly/FurnitureAssemblyTests/StorageContractTests/WorkerStorageContractTests.cs

@@ -0,0 +1,247 @@
+using FurnitureAssemblyContracts.DataModels;
+using FurnitureAssemblyContracts.Exceptions;
+using FurnitureAssemblyDatebase.Implementations;
+using FurnitureAssemblyDatebase.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace FurnitureAssemblyTests.StorageContractTests;
+
+[TestFixture]
+internal class WorkerStorageContractTests : BaseStorageContractTest
+{
+    private WorkerStorageContract _workerStorageContract;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _workerStorageContract = new WorkerStorageContract(FurnitureAssemblyDbContext);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        FurnitureAssemblyDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Workers\"CASCADE; ");
+    }
+
+    [Test]
+    public void Try_GetList_WhenHaveRecords_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1");
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2");
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(3));
+        AssertElement(list.First(), worker);
+    }
+
+    [Test]
+    public void Try_GetList_WhenNoRecords_Test()
+    {
+        var list = _workerStorageContract.GetList();
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.Empty);
+    }
+
+    [Test]
+    public void Try_GetList_ByPostId_Test()
+    {
+        var postId = Guid.NewGuid().ToString();
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1",
+        postId);
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2",
+        postId);
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
+        var list = _workerStorageContract.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()
+    {
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1",
+        birthDate: DateTime.UtcNow.AddYears(-25));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2",
+        birthDate: DateTime.UtcNow.AddYears(-21));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3",
+        birthDate: DateTime.UtcNow.AddYears(-20));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4",
+        birthDate: DateTime.UtcNow.AddYears(-19));
+        var list = _workerStorageContract.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()
+    {
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1",
+        employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2",
+        employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3",
+        employmentDate: DateTime.UtcNow.AddDays(1));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4",
+        employmentDate: DateTime.UtcNow.AddDays(2));
+        var list = _workerStorageContract.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();
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", postId, birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", postId, birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", postId, birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
+        InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
+        var list = _workerStorageContract.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 worker = InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_workerStorageContract.GetElementById(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_GetElementById_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenHaveRecord_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString());
+        AssertElement(_workerStorageContract.GetElementByFIO(worker.FIO), worker);
+    }
+
+    [Test]
+    public void Try_GetElementByFIO_WhenNoRecord_Test()
+    {
+        Assert.That(() => _workerStorageContract.GetElementByFIO("New Fio"), Is.Null);
+    }
+
+    [Test]
+    public void Try_AddElement_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        _workerStorageContract.AddElement(worker);
+        AssertElement(GetWorkerFromDatabase(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        InsertWorkerToDatabaseAndReturn(worker.Id);
+        Assert.That(() => _workerStorageContract.AddElement(worker), Throws.TypeOf<ElementExistsException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString(), "New Fio");
+        InsertWorkerToDatabaseAndReturn(worker.Id);
+        _workerStorageContract.UpdElement(worker);
+        AssertElement(GetWorkerFromDatabase(worker.Id), worker);
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())),
+        Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        InsertWorkerToDatabaseAndReturn(worker.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.UpdElement(worker),
+        Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_Test()
+    {
+        var worker = InsertWorkerToDatabaseAndReturn(Guid.NewGuid().ToString());
+        _workerStorageContract.DelElement(worker.Id);
+        var element = GetWorkerFromDatabase(worker.Id);
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.IsDeleted);
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWithThisId_Test()
+    {
+        Assert.That(() => _workerStorageContract.DelElement(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    [Test]
+    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
+    {
+        var worker = CreateModel(Guid.NewGuid().ToString());
+        InsertWorkerToDatabaseAndReturn(worker.Id, isDeleted: true);
+        Assert.That(() => _workerStorageContract.DelElement(worker.Id), Throws.TypeOf<ElementNotFoundException>());
+    }
+
+    private Worker InsertWorkerToDatabaseAndReturn(string id, string fio = "test", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false)
+    {
+        var worker = new Worker()
+        {
+            Id = id,
+            FIO = fio,
+            PostId = postId ?? Guid.NewGuid().ToString(),
+            BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20),
+            EmploymentDate = employmentDate ?? DateTime.UtcNow,
+            IsDeleted = isDeleted
+        };
+        FurnitureAssemblyDbContext.Workers.Add(worker);
+        FurnitureAssemblyDbContext.SaveChanges();
+        return worker;
+    }
+    private static void AssertElement(WorkerDataModel? actual, Worker 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.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate,
+            Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+    private static WorkerDataModel CreateModel(string id, string fio = "fio", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false) =>
+        new(id, fio, postId ?? Guid.NewGuid().ToString(), birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow, isDeleted);
+
+    private Worker? GetWorkerFromDatabase(string id) => FurnitureAssemblyDbContext.Workers.FirstOrDefault(x => x.Id == id);
+
+    private static void AssertElement(Worker? actual, WorkerDataModel 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.BirthDate, Is.EqualTo(expected.BirthDate));
+            Assert.That(actual.EmploymentDate,Is.EqualTo(expected.EmploymentDate));
+            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
+        });
+    }
+}