Тесты красной зоны

SmallSoftwareProject/SmallSoftwareBusinessLogic/Implementations/RequestBusinessLogicContract.cs

@@ -15,26 +15,20 @@ internal class RequestBusinessLogicContract(IRequestStorageContract requestStora
     private readonly ILogger _logger = logger;
     private readonly IRequestStorageContract _requestStorageContract =
     requestStorageContract;
-    public List<RequestDataModel> GetAllRequestsByPeriod(DateTime fromDate, DateTime
-    toDate)
+    public List<RequestDataModel> GetAllRequestsByPeriod(DateTime fromDate, DateTime toDate)
     {
         return [];
     }
-    public List<RequestDataModel> GetAllRequestsByWorkerByPeriod(string workerId,
-    DateTime fromDate, DateTime toDate)
+    public List<RequestDataModel> GetAllRequestsByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate)
     {
         return [];
     }
-    public List<RequestDataModel> GetAllRequestsByBuyerByPeriod(string? buyerId,
-    DateTime fromDate, DateTime toDate)
-    {
-        return [];
-    }
-    public List<RequestDataModel> GetAllRequestsByProductByPeriod(string productId,
-    DateTime fromDate, DateTime toDate)
+
+    public List<RequestDataModel> GetAllRequestsBySoftwareByPeriod(string softwareId, DateTime fromDate, DateTime toDate)
     {
         return [];
     }
+
     public RequestDataModel GetRequestByData(string data)
     {
         return new("", "", "", 0, false, []);
@@ -43,7 +37,8 @@ internal class RequestBusinessLogicContract(IRequestStorageContract requestStora
     {
     }
     public void CancelRequest(string id)
-        {
-        }
+    {
+    }
 
+    
 }

SmallSoftwareProject/SmallSoftwareBusinessLogic/SmallSoftwareBusinessLogic.csproj

@@ -10,6 +10,11 @@
     <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.2" />
   </ItemGroup>
 
+    <ItemGroup>
+	    <InternalsVisibleTo Include="SmallSoftwareTests" />
+	    <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+    </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\SmallSoftwareContracts\SmallSoftwareContracts.csproj" />
   </ItemGroup>

SmallSoftwareProject/SmallSoftwareContracts/BusinessLogicsContracts/IRequestBusinessLogicContract.cs

@@ -9,9 +9,13 @@ namespace SmallSoftwareContracts.BusinessLogicsContracts;
 
 public interface IRequestBusinessLogicContract
 {
+
     List<RequestDataModel> GetAllRequestsByPeriod(DateTime fromDate, DateTime toDate);
     List<RequestDataModel> GetAllRequestsByWorkerByPeriod(string workerId, DateTime fromDate, DateTime toDate);
-    List<RequestDataModel> GetAllRequestsByProductByPeriod(string productId, DateTime fromDate, DateTime toDate);
+
+    List<RequestDataModel> GetAllRequestsBySoftwareByPeriod(string softwareId, DateTime fromDate, DateTime toDate);
+
+
     RequestDataModel GetRequestByData(string data);
     void InsertRequest(RequestDataModel requestDataModel);
     void CancelRequest(string id);

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/ElementExistsException.cs

@@ -0,0 +1,13 @@
+
+namespace SmallSoftwareContracts.Exceptions;
+public class ElementExistsException : Exception
+{
+    public string ParamName { get; private set; }
+    public string ParamValue { get; private set; }
+    public ElementExistsException(string paramName, string paramValue) :
+    base($"There is already an element with value{paramValue} of parameter { paramName}")
+    {
+        ParamName = paramName;
+        ParamValue = paramValue;
+    }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/ElementNotFoundException.cs

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

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/IncorrectDatesException.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace SmallSoftwareContracts.Exceptions;
+
+public class IncorrectDatesException : Exception
+{ 
+public IncorrectDatesException(DateTime start, DateTime end) : 
+        base($"The end date must be later than the start date..StartDate: { start: dd.MM.YYYY}.EndDate: {end:dd.MM.YYYY}") { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/NullListException.cs

@@ -0,0 +1,7 @@
+
+namespace SmallSoftwareContracts.Exceptions;
+
+public class NullListException : Exception
+{
+    public NullListException() : base("The returned list is null") { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Exceptions/StorageException.cs

@@ -0,0 +1,8 @@
+
+
+namespace SmallSoftwareContracts.Exceptions;
+
+public class StorageException : Exception
+{
+    public StorageException(Exception ex) : base($"Error while working in storage: { ex.Message}", ex) { }
+}

SmallSoftwareProject/SmallSoftwareContracts/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareContracts.Extensions;
+
+public static class DateTimeExtensions
+{
+    public static bool IsDateNotOlder(this DateTime date, DateTime olderDate)
+    {
+        return date >= olderDate;
+    }
+}
+

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/ManufacturerBusinessLogicContractTests.cs

@@ -0,0 +1,446 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.BusinessLogicsContracts;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class ManufacturerBusinessLogicContractTests
+{
+    private IManufacturerBusinessLogicContract _manufacturerBusinessLogicContract;
+    private Mock<IManufacturerStorageContract> _manufacturerStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _manufacturerStorageContract = new
+        Mock<IManufacturerStorageContract>();
+        _manufacturerBusinessLogicContract = new ManufacturerBusinessLogicContract(_manufacturerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _manufacturerStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllManufacturers_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<ManufacturerDataModel>()
+    {
+    new(Guid.NewGuid().ToString(), "name 1", null, null),
+    new(Guid.NewGuid().ToString(), "name 2", null, null),
+    new(Guid.NewGuid().ToString(), "name 3", null, null),
+    };
+        _manufacturerStorageContract.Setup(x =>
+        x.GetList()).Returns(listOriginal);
+        //Act
+        var list = _manufacturerBusinessLogicContract.GetAllManufacturers();
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+    }
+    [Test]
+    public void GetAllManufacturers_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x => x.GetList()).Returns([]);
+        //Act
+        var list = _manufacturerBusinessLogicContract.GetAllManufacturers();
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _manufacturerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+    [Test]
+    public void GetAllManufacturers_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetAllManufacturers(),
+        Throws.TypeOf<NullListException>());
+        _manufacturerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+    [Test]
+    public void GetAllManufacturers_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x => x.GetList()).Throws(new
+        StorageException(new InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetAllManufacturers(),
+        Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x => x.GetList(), Times.Once);
+    }
+    [Test]
+    public void GetManufacturerByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new ManufacturerDataModel(id, "name", null, null);
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record);
+        
+    //Act
+        var element =
+        _manufacturerBusinessLogicContract.GetManufacturerByData(id);
+                //Assert
+                Assert.That(element, Is.Not.Null);
+                Assert.That(element.Id, Is.EqualTo(id));
+                _manufacturerStorageContract.Verify(x =>
+                x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetManufacturerByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var manufacturerName = "name";
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(),
+        manufacturerName, null, null);
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementByName(manufacturerName)).Returns(record);
+        //Act
+        var element =
+        _manufacturerBusinessLogicContract.GetManufacturerByData(manufacturerName);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.ManufacturerName, Is.EqualTo(manufacturerName));
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetManufacturerByData_GetByOldName_ReturnRecord_Test()
+    {
+        //Arrange
+        var manufacturerOldName = "name before";
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(),
+        "name", manufacturerOldName, null);
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementByOldName(manufacturerOldName)).Returns(record);
+        //Act
+        var element =
+        _manufacturerBusinessLogicContract.GetManufacturerByData(manufacturerOldName);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PrevManufacturerName,
+        Is.EqualTo(manufacturerOldName));
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetManufacturerByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never); 
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+            _manufacturerStorageContract.Verify(x =>
+            x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetManufacturerByData__GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<ElementNotFoundException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetManufacturerByData_GetByNameOrOldName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData("name"),
+        Throws.TypeOf<ElementNotFoundException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetManufacturerByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<StorageException>());
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData("name"),
+        Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByOldName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+ 
+    public void
+    GetManufacturerByData_GetByOldName_StorageThrowError_ThrowException_Test()
+        {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.GetElementByOldName(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.GetManufacturerByData("name"),
+        Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+        _manufacturerStorageContract.Verify(x =>
+        x.GetElementByOldName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertManufacturer_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(),
+        "name", null, null);
+        _manufacturerStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()))
+        .Callback((ManufacturerDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.ManufacturerName ==
+    record.ManufacturerName;
+        });
+        //Act
+        _manufacturerBusinessLogicContract.InsertManufacturer(record);
+        //Assert
+        _manufacturerStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertManufacturer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.InsertManufacturer(new(Guid.NewGuid().ToString
+        (), "name", null, null)), Throws.TypeOf<ElementExistsException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertManufacturer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.InsertManufacturer(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    } 
+    [Test]
+    public void InsertManufacturer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.InsertManufacturer(new
+        ManufacturerDataModel("id", "name", null, null)),
+        Throws.TypeOf<ValidationException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.InsertManufacturer(new(Guid.NewGuid().ToString
+        (), "name", null, null)), Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateManufacturer_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new ManufacturerDataModel(Guid.NewGuid().ToString(),
+        "name", null, null);
+        _manufacturerStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()))
+        .Callback((ManufacturerDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.ManufacturerName ==
+    record.ManufacturerName;
+        });
+        //Act
+        _manufacturerBusinessLogicContract.UpdateManufacturer(record);
+        //Assert
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void
+    UpdateManufacturer_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new
+        ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.UpdateManufacturer(new(Guid.NewGuid().ToString
+        (), "name", null, null)), Throws.TypeOf<ElementNotFoundException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once); 
+    }
+    [Test]
+    public void UpdateManufacturer_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.UpdateManufacturer(new(Guid.NewGuid().ToString
+        (), "name", null, null)), Throws.TypeOf<ElementExistsException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateManufacturer_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.UpdateManufacturer(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateManufacturer_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.UpdateManufacturer(new
+        ManufacturerDataModel("id", "name", null, null)),
+        Throws.TypeOf<ValidationException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.UpdateManufacturer(new(Guid.NewGuid().ToString
+        (), "name", null, null)), Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<ManufacturerDataModel>()), Times.Once);
+    }
+    [Test]
+    public void DeleteManufacturer_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _manufacturerStorageContract.Setup(x => x.DelElement(It.Is((string x)
+        => x == id))).Callback(() => { flag = true; });
+        //Act 
+        _manufacturerBusinessLogicContract.DeleteManufacturer(id);
+        //Assert
+        _manufacturerStorageContract.Verify(x =>
+        x.DelElement(It.IsAny<string>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void DeleteManufacturer_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _manufacturerStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.DeleteManufacturer(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void DeleteManufacturer_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.DeleteManufacturer(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.DeleteManufacturer(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void DeleteManufacturer_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.DeleteManufacturer("id"),
+        Throws.TypeOf<ValidationException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.DelElement(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void DeleteManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _manufacturerStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _manufacturerBusinessLogicContract.DeleteManufacturer(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _manufacturerStorageContract.Verify(x =>
+        x.DelElement(It.IsAny<string>()), Times.Once);
+    }
+}

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/PostBusinessLogicContractTests.cs

@@ -0,0 +1,567 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Enums;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class PostBusinessLogicContractTests
+{
+    private PostBusinessLogicContract _postBusinessLogicContract;
+    private Mock<IPostStorageContract> _postStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _postStorageContract = new Mock<IPostStorageContract>();
+        _postBusinessLogicContract = new
+        PostBusinessLogicContract(_postStorageContract.Object, new
+        Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _postStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllPosts_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<PostDataModel>()
+        {
+        new(Guid.NewGuid().ToString(),"name 1", PostType.SoftInstaller,
+        10, true, DateTime.UtcNow),
+        new(Guid.NewGuid().ToString(), "name 2", PostType.SoftInstaller,
+        10, false, DateTime.UtcNow),
+        new(Guid.NewGuid().ToString(), "name 3", PostType.SoftInstaller,
+        10, true, DateTime.UtcNow),
+        };
+        _postStorageContract.Setup(x =>
+        x.GetList(It.IsAny<bool>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive = _postBusinessLogicContract.GetAllPosts(true);
+        var listAll = _postBusinessLogicContract.GetAllPosts(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(listAll, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(listAll, Is.EquivalentTo(listOriginal));
+        });
+        _postStorageContract.Verify(x => x.GetList(true), Times.Once);
+        _postStorageContract.Verify(x => x.GetList(false), Times.Once);
+    }
+    [Test]
+    public void GetAllPosts_ReturnEmptyList_Test()
+    { 
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.GetList(It.IsAny<bool>())).Returns([]);
+        //Act
+        var listOnlyActive = _postBusinessLogicContract.GetAllPosts(true);
+        var listAll = _postBusinessLogicContract.GetAllPosts(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(listAll, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(listAll, Has.Count.EqualTo(0));
+        });
+        _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()),
+        Times.Exactly(2));
+    }
+    [Test]
+    public void GetAllPosts_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.GetAllPosts(It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>());
+        _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()),
+        Times.Once);
+    }
+    [Test]
+    public void GetAllPosts_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.GetList(It.IsAny<bool>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.GetAllPosts(It.IsAny<bool>()),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.GetList(It.IsAny<bool>()),
+        Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        var listOriginal = new List<PostDataModel>()
+        {
+        new(postId, "name 1", PostType.SoftInstaller, 10, true,
+        DateTime.UtcNow),
+        new(postId, "name 2", PostType.SoftInstaller, 10, false,
+        DateTime.UtcNow)
+        };
+        _postStorageContract.Setup(x =>
+        x.GetPostWithHistory(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _postBusinessLogicContract.GetAllDataOfPost(postId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(2)); 
+        _postStorageContract.Verify(x => x.GetPostWithHistory(postId),
+        Times.Once);
+        }
+    [Test]
+    public void GetAllDataOfPost_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.GetPostWithHistory(It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString());
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _postBusinessLogicContract.GetAllDataOfPost(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllDataOfPost_PostIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetAllDataOfPost("id"),
+        Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllDataOfPost_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<NullListException>());
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllDataOfPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.GetPostWithHistory(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert 
+        Assert.That(() =>
+        _postBusinessLogicContract.GetAllDataOfPost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x =>
+        x.GetPostWithHistory(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new PostDataModel(id, "name", PostType.SoftInstaller, 10,
+        true, DateTime.UtcNow);
+        _postStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _postBusinessLogicContract.GetPostByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _postStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var postName = "name";
+        var record = new PostDataModel(Guid.NewGuid().ToString(), postName,
+        PostType.SoftInstaller, 10, true, DateTime.UtcNow);
+        _postStorageContract.Setup(x =>
+        x.GetElementByName(postName)).Returns(record);
+        //Act
+        var element = _postBusinessLogicContract.GetPostByData(postName);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.PostName, Is.EqualTo(postName));
+        _postStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _postBusinessLogicContract.GetPostByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+        _postStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetPostByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+    Assert.That(() =>
+    _postBusinessLogicContract.GetPostByData(Guid.NewGuid().ToString()),
+    Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _postStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetPostByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.GetPostByData("name"),
+        Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+        _postStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetPostByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        _postStorageContract.Setup(x =>
+        x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.GetPostByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        Assert.That(() => _postBusinessLogicContract.GetPostByData("name"),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _postStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertPost_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow.AddDays(-1));
+        _postStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<PostDataModel>()))
+        .Callback((PostDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.PostName ==
+    record.PostName && x.PostType == record.PostType && x.Salary == record.Salary &&
+    x.ChangeDate == record.ChangeDate;
+        });
+        //Act
+        _postBusinessLogicContract.InsertPost(record);
+        //Assert
+        _postStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertPost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<PostDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<ElementExistsException>());
+        _postStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertPost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertPost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.InsertPost(new
+        PostDataModel("id", "name", PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertPost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.InsertPost(new(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow.AddDays(-1));
+        _postStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()))
+    .Callback((PostDataModel x) =>
+    {
+        flag = x.Id == record.Id && x.PostName ==
+    record.PostName && x.PostType == record.PostType && x.Salary == record.Salary &&
+    x.ChangeDate == record.ChangeDate;
+    });
+        //Act
+        _postBusinessLogicContract.UpdatePost(record);
+        //Assert
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void UpdatePost_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<PostDataModel>())).Throws(new
+        ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<PostDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "anme",
+        PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<ElementExistsException>());
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdatePost_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdatePost_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.UpdatePost(new
+        PostDataModel("id", "name", PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<ValidationException>());
+    _postStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<PostDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdatePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<PostDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.UpdatePost(new(Guid.NewGuid().ToString(), "name",
+        PostType.Supervisor, 10, true, DateTime.UtcNow)),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<PostDataModel>()), Times.Once);
+    }
+    [Test]
+    public void DeletePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _postStorageContract.Setup(x => x.DelElement(It.Is((string x) => x ==
+        id))).Callback(() => { flag = true; });
+        //Act
+        _postBusinessLogicContract.DeletePost(id);
+        //Assert
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void DeletePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.DeletePost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void DeletePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _postBusinessLogicContract.DeletePost(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+[Test]
+    public void DeletePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.DeletePost("id"),
+        Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void DeletePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.DeletePost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void RestorePost_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _postStorageContract.Setup(x => x.ResElement(It.Is((string x) => x ==
+        id))).Callback(() => { flag = true; });
+        //Act
+        _postBusinessLogicContract.RestorePost(id);
+        //Assert
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()),
+        Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void RestorePost_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x =>
+        x.ResElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.RestorePost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void RestorePost_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost(null),
+        Throws.TypeOf<ArgumentNullException>());
+    Assert.That(() =>
+    _postBusinessLogicContract.RestorePost(string.Empty),
+    Throws.TypeOf<ArgumentNullException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void RestorePost_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _postBusinessLogicContract.RestorePost("id"),
+        Throws.TypeOf<ValidationException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void RestorePost_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _postStorageContract.Setup(x =>
+        x.ResElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _postBusinessLogicContract.RestorePost(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _postStorageContract.Verify(x => x.ResElement(It.IsAny<string>()),
+        Times.Once);
+    }
+}
+

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/RequestBusinessLogicContractTests.cs

@@ -0,0 +1,536 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class RequestBusinessLogicContractTests
+{
+    private RequestBusinessLogicContract _requestBusinessLogicContract;
+    private Mock<IRequestStorageContract> _requestStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+
+    {
+    _requestStorageContract = new Mock<IRequestStorageContract>();
+    _requestBusinessLogicContract = new
+    RequestBusinessLogicContract(_requestStorageContract.Object, new
+    Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _requestStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllRequestsByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<RequestDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [new InstallationRequestDataModel(Guid.NewGuid().ToString(),Guid.NewGuid().ToString(), 5)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []), new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []),
+        };
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list = _requestBusinessLogicContract.GetAllRequestsByPeriod(date,
+        date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _requestStorageContract.Verify(x => x.GetList(date, date.AddDays(1), null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(),
+        It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _requestBusinessLogicContract.GetAllRequestsByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsByPeriod_IncorrectDates_ThrowException_Test()
+    { 
+    //Arrange
+    var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByPeriod(date, date),
+        Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByPeriod(date, date.AddSeconds(-1)),
+        Throws.TypeOf<IncorrectDatesException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllRequestsByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsByWorkerByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var workerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<RequestDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [new InstallationRequestDataModel(Guid.NewGuid().ToString(),Guid.NewGuid().ToString(), 5)]),
+            new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []), new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []),
+        };
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Returns(listOriginal);
+        //Act 
+        var list =
+       _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(workerId, date,
+        date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _requestStorageContract.Verify(x => x.GetList(date, date.AddDays(1),
+        workerId, null), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsByWorkerByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(Guid.NewGuid().ToString(),
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllRequestsByWorkerByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(Guid.NewGuid().ToString(),
+        date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(Guid.NewGuid().ToString(),
+        date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetAllRequestsByWorkerByPeriod_WorkerIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(null, DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(string.Empty,
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<ArgumentNullException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllRequestsByWorkerByPeriod_WorkerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod("workerId",
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<ValidationException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllRequestsByWorkerByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(Guid.NewGuid().ToString(),
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<NullListException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllRequestsByWorkerByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsByWorkerByPeriod(Guid.NewGuid().ToString(),
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    
+    [Test]
+    public void GetAllRequestsBySoftwareByPeriod_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var softwareId = Guid.NewGuid().ToString();
+        var listOriginal = new List<RequestDataModel>()
+        {
+        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [new InstallationRequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]),
+        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []),
+        new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, []),
+        };
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list =
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(softwareId, date,
+        date.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _requestStorageContract.Verify(x => x.GetList(date, date.AddDays(1),
+        null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllRequestsBySoftwareByPeriod_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString()
+        , DateTime.UtcNow, DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllRequestsBySoftwareByPeriod_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString()
+        , date, date), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString()
+        , date, date.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetAllRequestsBySoftwareByPeriod_SoftwareIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString(), DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(string.Empty, DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<ArgumentNullException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetAllRequestsBySoftwareByPeriod_SoftwareIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod("softwareId",
+        DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<ValidationException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllRequestsBySoftwareByPeriod_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString()
+        , DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<NullListException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllRequestsBySoftwareByPeriod_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetAllRequestsBySoftwareByPeriod(Guid.NewGuid().ToString()
+        , DateTime.UtcNow, DateTime.UtcNow.AddDays(1)),
+        Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x => x.GetList(It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<string>(), 
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetRequestByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new RequestDataModel(id, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [new InstallationRequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _requestStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record); 
+    //Act
+    var element = _requestBusinessLogicContract.GetRequestByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _requestStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetRequestByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.GetRequestByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetRequestByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _requestStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetRequestByData_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.GetRequestByData("requestId"),
+        Throws.TypeOf<ValidationException>());
+        _requestStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetRequestByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetRequestByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _requestStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetRequestByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x =>
+        x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.GetRequestByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertRequest_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false; 
+        var record = new RequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, 
+            [new InstallationRequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)]);
+        _requestStorageContract.Setup(x => x.AddElement(It.IsAny<RequestDataModel>()))
+        .Callback((RequestDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.WorkerId == record.WorkerId && x.IsCancel ==
+            record.IsCancel && x.Softwares.Count == record.Softwares.Count &&
+            x.Softwares.First().SoftwareId ==
+            record.Softwares.First().SoftwareId &&
+            x.Softwares.First().RequestId ==
+            record.Softwares.First().RequestId &&
+            x.Softwares.First().Count ==
+            record.Softwares.First().Count;
+        });
+        //Act
+        _requestBusinessLogicContract.InsertRequest(record);
+        //Assert
+        _requestStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<RequestDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertRequest_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<RequestDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.InsertRequest(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10,false, 
+        [new InstallationRequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<ElementExistsException>());
+        _requestStorageContract.Verify(x => x.AddElement(It.IsAny<RequestDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertRequest_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.InsertRequest(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _requestStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<RequestDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertRequest_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.InsertRequest(new RequestDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [])), Throws.TypeOf<ValidationException>());
+    _requestStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<RequestDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertRequest_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<RequestDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.InsertRequest(new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, false, [new InstallationRequestDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 5)])), Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<RequestDataModel>()), Times.Once);
+    }
+    [Test]
+    public void CancelRequest_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _requestStorageContract.Setup(x => x.DelElement(It.Is((string x) => x ==
+        id))).Callback(() => { flag = true; });
+        //Act
+        _requestBusinessLogicContract.CancelRequest(id);
+        //Assert
+        _requestStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void CancelRequest_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.CancelRequest(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _requestStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void CancelRequest_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.CancelRequest(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _requestBusinessLogicContract.CancelRequest(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _requestStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never); 
+    }
+    [Test]
+    public void CancelRequest_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _requestBusinessLogicContract.CancelRequest("id"),
+        Throws.TypeOf<ValidationException>());
+        _requestStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void CancelRequest_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _requestStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _requestBusinessLogicContract.CancelRequest(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _requestStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+}

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/SalaryBusinessLogicContractTests.cs

@@ -0,0 +1,460 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Enums;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class SalaryBusinessLogicContractTests
+{
+    private SalaryBusinessLogicContract _salaryBusinessLogicContract;
+    private Mock<ISalaryStorageContract> _salaryStorageContract;
+    private Mock<IRequestStorageContract> _requestStorageContract;
+    private Mock<IPostStorageContract> _postStorageContract;
+    private Mock<IWorkerStorageContract> _workerStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _salaryStorageContract = new Mock<ISalaryStorageContract>();
+        _requestStorageContract = new Mock<IRequestStorageContract>();
+        _postStorageContract = new Mock<IPostStorageContract>();
+        _workerStorageContract = new Mock<IWorkerStorageContract>();
+        _salaryBusinessLogicContract = new
+        SalaryBusinessLogicContract(_salaryStorageContract.Object,
+        _requestStorageContract.Object, _postStorageContract.Object,
+        _workerStorageContract.Object, new Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _salaryStorageContract.Reset();
+        _requestStorageContract.Reset();
+        _postStorageContract.Reset();
+        _workerStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllSalaries_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1);
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 10),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1),
+            14),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(-1),
+            30),
+        };
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list =
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(startDate, endDate);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate,
+        null), Times.Once);
+    }
+    [Test] 
+    public void GetAllSalaries_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSalaries_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var dateTime = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime, dateTime),
+        Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(dateTime,
+        dateTime.AddSeconds(-1)), Throws.TypeOf<IncorrectDatesException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllSalaries_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<NullListException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSalaries_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriod(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1)), Throws.TypeOf<StorageException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var startDate = DateTime.UtcNow;
+        var endDate = DateTime.UtcNow.AddDays(1); 
+        var workerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SalaryDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow, 10),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(1),
+            14),
+            new(Guid.NewGuid().ToString(), DateTime.UtcNow.AddDays(-1),
+            30),
+        };
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list =
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(startDate, endDate,
+        workerId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _salaryStorageContract.Verify(x => x.GetList(startDate, endDate,
+        workerId), Times.Once);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString());
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var dateTime = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(dateTime, dateTime,
+        Guid.NewGuid().ToString()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(dateTime,
+        dateTime.AddSeconds(-1), Guid.NewGuid().ToString()),
+        Throws.TypeOf<IncorrectDatesException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetAllSalariesByWorker_WorkerIdIsNUllOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), null), Throws.TypeOf<ArgumentNullException>()); 
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_WorkerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), "workerId"), Throws.TypeOf<ValidationException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()),
+        Throws.TypeOf<NullListException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSalariesByWorker_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _salaryStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.GetAllSalariesByPeriodByWorker(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _salaryStorageContract.Verify(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void CalculateSalaryByMounth_CalculateSalary_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        var requestSum = 200.0;
+        var postSalary = 2000.0;
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(), workerId, Guid.NewGuid().ToString(), requestSum,  false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, postSalary, true, DateTime.UtcNow)); 
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+        Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        var sum = 0.0;
+        var expectedSum = postSalary + requestSum * 0.1;
+        _salaryStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<SalaryDataModel>()))
+        .Callback((SalaryDataModel x) =>
+        {
+            sum = x.Salary;
+        });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
+    [Test]
+    public void CalculateSalaryByMounth_WithSeveralWorkers_Test()
+    {
+        //Arrange
+        var worker1Id = Guid.NewGuid().ToString();
+        var worker2Id = Guid.NewGuid().ToString();
+        var worker3Id = Guid.NewGuid().ToString();
+        var list = new List<WorkerDataModel>() {
+            new(worker1Id, "Test", Guid.NewGuid().ToString(),
+            DateTime.UtcNow, DateTime.UtcNow, false),
+            new(worker2Id, "Test", Guid.NewGuid().ToString(),
+            DateTime.UtcNow, DateTime.UtcNow, false),
+            new(worker3Id, "Test", Guid.NewGuid().ToString(),
+            DateTime.UtcNow, DateTime.UtcNow, false)
+        };  
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(),
+            worker1Id, Guid.NewGuid().ToString(), 1, false, []),
+            new RequestDataModel(Guid.NewGuid().ToString(), worker1Id, Guid.NewGuid().ToString(),
+            1, false, []),
+            new RequestDataModel(Guid.NewGuid().ToString(), worker2Id, Guid.NewGuid().ToString(),
+            1, false, []),
+            new RequestDataModel(Guid.NewGuid().ToString(), worker3Id, Guid.NewGuid().ToString(),
+            1, false, []),
+            new RequestDataModel(Guid.NewGuid().ToString(), worker3Id, Guid.NewGuid().ToString(),
+            1, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns(list);
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow);
+        //Assert
+        _salaryStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SalaryDataModel>()), Times.Exactly(list.Count));
+    }
+    [Test] 
+    public void CalculateSalaryByMounth_WithoitRequestsByWorker_Test()
+    {
+        //Arrange
+        var postSalary = 2000.0;
+        var workerId = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, postSalary, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        var sum = 0.0;
+        var expectedSum = postSalary;
+        _salaryStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<SalaryDataModel>()))
+        .Callback((SalaryDataModel x) =>
+        {
+            sum = x.Salary;
+        });
+        //Act
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow);
+        //Assert
+        Assert.That(sum, Is.EqualTo(expectedSum));
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_RequestStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<NullListException>());
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_PostStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(), workerId, Guid.NewGuid().ToString(), 200, false, [])]); 
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+        Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<NullListException>());
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_WorkerStorageReturnNull_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(),
+        workerId, Guid.NewGuid().ToString(), 200,  false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, 2000, true, DateTime.UtcNow));
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<NullListException>());
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_RequestStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Throws(new StorageException(new
+        InvalidOperationException()));
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<StorageException>());
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_PostStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString(); 
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(),
+        workerId, Guid.NewGuid().ToString(), 200, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Throws(new StorageException(new
+        InvalidOperationException()));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Returns([new WorkerDataModel(workerId, "Test",
+Guid.NewGuid().ToString(), DateTime.UtcNow, DateTime.UtcNow, false)]);
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<StorageException>());
+    }
+    [Test]
+    public void
+    CalculateSalaryByMounth_WorkerStorageThrowException_ThrowException_Test()
+    {
+        //Arrange
+        var workerId = Guid.NewGuid().ToString();
+        _requestStorageContract.Setup(x => x.GetList(It.IsAny<DateTime>(),
+        It.IsAny<DateTime>(), It.IsAny<string>(), It.IsAny<string>()))
+        .Returns([new RequestDataModel(Guid.NewGuid().ToString(), workerId, Guid.NewGuid().ToString(), 200, false, [])]);
+        _postStorageContract.Setup(x => x.GetElementById(It.IsAny<string>()))
+        .Returns(new PostDataModel(Guid.NewGuid().ToString(), "name",
+        PostType.SoftInstaller, 2000, true, DateTime.UtcNow));
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()))
+        .Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _salaryBusinessLogicContract.CalculateSalaryByMonth(DateTime.UtcNow),
+        Throws.TypeOf<StorageException>());
+    }
+}
+

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/SoftwareBusinessLogicContractTests.cs

@@ -0,0 +1,620 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Enums;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static NUnit.Framework.Internal.OSPlatform;
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class SoftwareBusinessLogicContractTests
+{
+    private SoftwareBusinessLogicContract _softwareBusinessLogicContract;
+    private Mock<ISoftwareStorageContract> _softwareStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _softwareStorageContract = new Mock<ISoftwareStorageContract>();
+        _softwareBusinessLogicContract = new
+        SoftwareBusinessLogicContract(_softwareStorageContract.Object, new
+        Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _softwareStorageContract.Reset();
+    } 
+    [Test]
+    public void GetAllSoftwares_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<SoftwareDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "name 1", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false),
+            new(Guid.NewGuid().ToString(), "name 2", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, true),
+            new(Guid.NewGuid().ToString(), "name 3", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false),
+        };
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _softwareBusinessLogicContract.GetAllSoftwares(true);
+        var list = _softwareBusinessLogicContract.GetAllSoftwares(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _softwareStorageContract.Verify(x => x.GetList(true, null),
+        Times.Once);
+        _softwareStorageContract.Verify(x => x.GetList(false, null),
+        Times.Once);
+    }
+    [Test]
+    public void GetAllSoftwares_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Returns([]);
+        //Act
+        var listOnlyActive =
+        _softwareBusinessLogicContract.GetAllSoftwares(true);
+        var list = _softwareBusinessLogicContract.GetAllSoftwares(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        null), Times.Exactly(2));
+    }
+    [Test]
+    public void GetAllSoftwares_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwares(It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>()); 
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSoftwares_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwares(It.IsAny<bool>()),
+        Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetAllSoftwaresByManufacturer_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var manufacturerId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SoftwareDataModel>()
+        {
+        new(Guid.NewGuid().ToString(), "name 1",SoftwareType.Windows,
+        Guid.NewGuid().ToString(), 10, false),
+        new(Guid.NewGuid().ToString(), "name 2",
+        SoftwareType.Windows, Guid.NewGuid().ToString(), 10, true),
+        new(Guid.NewGuid().ToString(), "name 3",
+        SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false),
+        };
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(manufacturerId, true);
+        var list =
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(manufacturerId,
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _softwareStorageContract.Verify(x => x.GetList(true, manufacturerId),
+        Times.Once);
+        _softwareStorageContract.Verify(x => x.GetList(false, manufacturerId),
+        Times.Once);
+    }
+    [Test]
+    public void GetAllSoftwaresByManufacturer_ReturnEmptyList_Test()
+    {
+        //Arrange
+        var manufacturerId = Guid.NewGuid().ToString();
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Returns([]);
+        //Act 
+        var listOnlyActive =
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(manufacturerId, true);
+        var list =
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(manufacturerId,
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        manufacturerId), Times.Exactly(2));
+    }
+    [Test]
+    public void
+    GetAllSoftwaresByManufacturer_ManufacturerIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(null,
+        It.IsAny<bool>()), Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(string.Empty,
+        It.IsAny<bool>()), Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void
+    GetAllSoftwaresByManufacturer_ManufacturerIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer("manufacturerId",
+        It.IsAny<bool>()), Throws.TypeOf<ValidationException>());
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetAllSoftwaresByManufacturer_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(Guid.NewGuid().ToString(), It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllSoftwaresByManufacturer_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert 
+    Assert.That(() =>
+    _softwareBusinessLogicContract.GetAllSoftwaresByManufacturer(Guid.NewGuid().ToString(), It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareHistoryBySoftware_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var softwareId = Guid.NewGuid().ToString();
+        var listOriginal = new List<SoftwareHistoryDataModel>()
+{
+new(Guid.NewGuid().ToString(), 10),
+new(Guid.NewGuid().ToString(), 15),
+new(Guid.NewGuid().ToString(), 10),
+};
+        _softwareStorageContract.Setup(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>())).Returns(listOriginal);
+        //Act
+        var list =
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(softwareId);
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Is.EquivalentTo(listOriginal));
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(softwareId), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareHistoryBySoftware_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>())).Returns([]);
+        //Act
+        var list =
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(Guid.NewGuid().ToString(
+        ));
+        //Assert
+        Assert.That(list, Is.Not.Null);
+        Assert.That(list, Has.Count.EqualTo(0));
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetSoftwareHistoryBySoftware_SoftwareIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>()), Times.Never);
+    }
+    [Test] 
+    public void
+    GetSoftwareHistoryBySoftware_SoftwareIdIsNotGuid_ThrowException_Test()
+        {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware("softwareId"),
+        Throws.TypeOf<ValidationException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetSoftwareHistoryBySoftware_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<NullListException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetSoftwareHistoryBySoftware_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareHistoryBySoftware(Guid.NewGuid().ToString(
+        )), Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetHistoryBySoftwareId(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareByData_GetById_ReturnRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new SoftwareDataModel(id, "name", SoftwareType.Windows,
+        Guid.NewGuid().ToString(), 10, false);
+        _softwareStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _softwareBusinessLogicContract.GetSoftwareByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _softwareStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareByData_GetByName_ReturnRecord_Test()
+    {
+        //Arrange
+        var name = "name";
+        var record = new SoftwareDataModel(Guid.NewGuid().ToString(), name,
+        SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false); 
+        _softwareStorageContract.Setup(x =>
+        x.GetElementByName(name)).Returns(record);
+        //Act
+        var element = _softwareBusinessLogicContract.GetSoftwareByData(name);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.SoftwareName, Is.EqualTo(name));
+        _softwareStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+        _softwareStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetSoftwareByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareByData_GetByName_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData("name"),
+        Throws.TypeOf<ElementNotFoundException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetSoftwareByData_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        _softwareStorageContract.Setup(x =>
+        x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>()); 
+        Assert.That(() =>
+        _softwareBusinessLogicContract.GetSoftwareByData("name"),
+        Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _softwareStorageContract.Verify(x =>
+        x.GetElementByName(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void InsertSoftware_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new SoftwareDataModel(Guid.NewGuid().ToString(), "name",
+        SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false);
+        _softwareStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()))
+        .Callback((SoftwareDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.SoftwareName ==
+    record.SoftwareName && x.SoftwareType == record.SoftwareType &&
+    x.ManufacturerId == record.ManufacturerId && x.Price ==
+    record.Price && x.IsDeleted == record.IsDeleted;
+        });
+        //Act
+        _softwareBusinessLogicContract.InsertSoftware(record);
+        //Assert
+        _softwareStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void InsertSoftware_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.InsertSoftware(new(Guid.NewGuid().ToString(),
+        "name", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false)),
+        Throws.TypeOf<ElementExistsException>());
+        _softwareStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+    }
+    [Test]
+    public void InsertSoftware_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _softwareBusinessLogicContract.InsertSoftware(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertSoftware_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert 
+        Assert.That(() => _softwareBusinessLogicContract.InsertSoftware(new
+        SoftwareDataModel("id", "name", SoftwareType.Windows, Guid.NewGuid().ToString(),
+        10, false)), Throws.TypeOf<ValidationException>());
+        _softwareStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()), Times.Never);
+    }
+    [Test]
+    public void InsertSoftware_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.InsertSoftware(new(Guid.NewGuid().ToString(),
+        "name", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false)),
+        Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x =>
+        x.AddElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateSoftware_CorrectRecord_Test()
+    {
+        //Arrange
+        var flag = false;
+        var record = new SoftwareDataModel(Guid.NewGuid().ToString(), "name",
+        SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false);
+        _softwareStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()))
+        .Callback((SoftwareDataModel x) =>
+        {
+            flag = x.Id == record.Id && x.SoftwareName ==
+    record.SoftwareName && x.SoftwareType == record.SoftwareType &&
+    x.ManufacturerId == record.ManufacturerId && x.Price ==
+    record.Price && x.IsDeleted == record.IsDeleted;
+        });
+        //Act
+        _softwareBusinessLogicContract.UpdateSoftware(record);
+        //Assert
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void UpdateSoftware_RecordWithIncorrectData_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>())).Throws(new
+        ElementNotFoundException(""));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.UpdateSoftware(new(Guid.NewGuid().ToString(),
+        "name", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false)),
+        Throws.TypeOf<ElementNotFoundException>());
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+    }
+    [Test]
+ 
+    public void UpdateSoftware_RecordWithExistsData_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>())).Throws(new
+        ElementExistsException("Data", "Data"));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.UpdateSoftware(new(Guid.NewGuid().ToString(),
+        "anme", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false)),
+        Throws.TypeOf<ElementExistsException>());
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+    }
+    [Test]
+    public void UpdateSoftware_NullRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _softwareBusinessLogicContract.UpdateSoftware(null),
+        Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateSoftware_InvalidRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _softwareBusinessLogicContract.UpdateSoftware(new
+        SoftwareDataModel("id", "name", SoftwareType.Windows, Guid.NewGuid().ToString(),
+        10, false)), Throws.TypeOf<ValidationException>());
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Never);
+    }
+    [Test]
+    public void UpdateSoftware_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.UpdateSoftware(new(Guid.NewGuid().ToString(),
+        "name", SoftwareType.Windows, Guid.NewGuid().ToString(), 10, false)),
+        Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x =>
+        x.UpdElement(It.IsAny<SoftwareDataModel>()), Times.Once);
+    }
+    [Test]
+    public void DeleteSoftware_CorrectRecord_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        var flag = false;
+        _softwareStorageContract.Setup(x => x.DelElement(It.Is((string x) => x
+        == id))).Callback(() => { flag = true; });
+        //Act
+        _softwareBusinessLogicContract.DeleteSoftware(id);
+        //Assert 
+        _softwareStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+        Assert.That(flag);
+    }
+    [Test]
+    public void DeleteSoftware_RecordWithIncorrectId_ThrowException_Test()
+    {
+        //Arrange
+        var id = Guid.NewGuid().ToString();
+        _softwareStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(id));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.DeleteSoftware(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _softwareStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+    [Test]
+    public void DeleteSoftware_IdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _softwareBusinessLogicContract.DeleteSoftware(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _softwareBusinessLogicContract.DeleteSoftware(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _softwareStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void DeleteSoftware_IdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _softwareBusinessLogicContract.DeleteSoftware("id"),
+        Throws.TypeOf<ValidationException>());
+        _softwareStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Never);
+    }
+    [Test]
+    public void DeleteSoftware_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _softwareStorageContract.Setup(x =>
+        x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _softwareBusinessLogicContract.DeleteSoftware(Guid.NewGuid().ToString()),
+        Throws.TypeOf<StorageException>());
+        _softwareStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+        Times.Once);
+    }
+}
+

SmallSoftwareProject/SmallSoftwareTests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs

@@ -0,0 +1,766 @@
+using Microsoft.Extensions.Logging;
+using Moq;
+using SmallSoftwareBusinessLogic.Implementations;
+using SmallSoftwareContracts.DataModels;
+using SmallSoftwareContracts.Exceptions;
+using SmallSoftwareContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareTests.BusinessLogicsContractsTests;
+
+[TestFixture]
+internal class WorkerBusinessLogicContractTests
+{
+    private WorkerBusinessLogicContract _workerBusinessLogicContract;
+    private Mock<IWorkerStorageContract> _workerStorageContract;
+    [OneTimeSetUp]
+    public void OneTimeSetUp()
+    {
+        _workerStorageContract = new Mock<IWorkerStorageContract>();
+        _workerBusinessLogicContract = new
+        WorkerBusinessLogicContract(_workerStorageContract.Object, new
+        Mock<ILogger>().Object);
+    }
+    [SetUp]
+    public void SetUp()
+    {
+        _workerStorageContract.Reset();
+    }
+    [Test]
+    public void GetAllWorkers_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var listOriginal = new List<WorkerDataModel>() 
+    {
+            new(Guid.NewGuid().ToString(), "fio 1",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            false),
+            new(Guid.NewGuid().ToString(), "fio 2",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            true),
+            new(Guid.NewGuid().ToString(), "fio 3",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            false),
+    };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkers(true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null,
+        null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null,
+        null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkers_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkers(true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), null,
+        null, null, null, null), Times.Exactly(2));
+    }
+    [Test]
+    public void GetAllWorkers_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkers(It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>()); 
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkers_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkers(It.IsAny<bool>()),
+        Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(), null,
+        null, null, null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByPost_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var postId = Guid.NewGuid().ToString();
+        var listOriginal = new List<WorkerDataModel>()
+{
+new(Guid.NewGuid().ToString(), "fio 1",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+false),
+new(Guid.NewGuid().ToString(), "fio 2",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+true),
+new(Guid.NewGuid().ToString(), "fio 3",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+false),
+};
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByPost(postId, true);
+        var list = _workerBusinessLogicContract.GetAllWorkersByPost(postId,
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, postId, null,
+        null, null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, postId, null,
+        null, null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByPost_ReturnEmptyList_Test()
+    {
+        //Arrange 
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(),
+        true);
+        var list =
+        _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(),
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Exactly(2));
+    }
+    [Test]
+    public void GetAllWorkersByPost_PostIdIsNullOrEmpty_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByPost(null, It.IsAny<bool>()),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByPost(string.Empty, It.IsAny<bool>()),
+        Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+    [Test]
+    public void GetAllWorkersByPost_PostIdIsNotGuid_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByPost("postId", It.IsAny<bool>()),
+        Throws.TypeOf<ValidationException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+    [Test]
+    public void GetAllWorkersByPost_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(),
+        It.IsAny<bool>()), Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByPost_StorageThrowError_ThrowException_Test() 
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByPost(Guid.NewGuid().ToString(),
+        It.IsAny<bool>()), Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<WorkerDataModel>()
+        {
+            new(Guid.NewGuid().ToString(), "fio 1",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            false),
+            new(Guid.NewGuid().ToString(), "fio 2",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            true),
+            new(Guid.NewGuid().ToString(), "fio 3",
+            Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+            false),
+        };
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddDays(1),
+        true);
+        var list =
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddDays(1),
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, date,
+        date.AddDays(1), null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, date,
+        date.AddDays(1), null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act 
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), true);
+        var list = _workerBusinessLogicContract.GetAllWorkers(false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null,
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), null, null), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null,
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>(), null, null), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByBirthDate_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date,
+        It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(date, date.AddSeconds(-1),
+        It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+    [Test]
+    public void GetAllWorkersByBirthDate_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllWorkersByBirthDate_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByBirthDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), It.IsAny<bool>()),
+            Throws.TypeOf<StorageException>()); 
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnListOfRecords_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        var listOriginal = new List<WorkerDataModel>()
+{
+new(Guid.NewGuid().ToString(), "fio 1",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+false),
+new(Guid.NewGuid().ToString(), "fio 2",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+true),
+new(Guid.NewGuid().ToString(), "fio 3",
+Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+false),
+};
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns(listOriginal);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date.AddDays(1),
+        true);
+        var list =
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date.AddDays(1),
+        false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null);
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Is.EquivalentTo(listOriginal));
+            Assert.That(list, Is.EquivalentTo(listOriginal));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null,
+        date, date.AddDays(1)), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null,
+        date, date.AddDays(1)), Times.Once);
+    }
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnEmptyList_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Returns([]);
+        //Act
+        var listOnlyActive =
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), true);
+        var list =
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), false);
+        //Assert
+        Assert.Multiple(() =>
+        {
+            Assert.That(listOnlyActive, Is.Not.Null); 
+            Assert.That(list, Is.Not.Null);
+            Assert.That(listOnlyActive, Has.Count.EqualTo(0));
+            Assert.That(list, Has.Count.EqualTo(0));
+        });
+        _workerStorageContract.Verify(x => x.GetList(true, null, null, null,
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+        _workerStorageContract.Verify(x => x.GetList(false, null, null, null,
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllWorkersByEmploymentDate_IncorrectDates_ThrowException_Test()
+    {
+        //Arrange
+        var date = DateTime.UtcNow;
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date, date,
+        It.IsAny<bool>()), Throws.TypeOf<IncorrectDatesException>());
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(date,
+        date.AddSeconds(-1), It.IsAny<bool>()),
+        Throws.TypeOf<IncorrectDatesException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Never);
+    }
+    [Test]
+    public void GetAllWorkersByEmploymentDate_ReturnNull_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), It.IsAny<bool>()),
+        Throws.TypeOf<NullListException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void
+    GetAllWorkersByEmploymentDate_StorageThrowError_ThrowException_Test()
+    {
+        //Arrange
+        _workerStorageContract.Setup(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>())).Throws(new StorageException(new
+        InvalidOperationException()));
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetAllWorkersByEmploymentDate(DateTime.UtcNow,
+        DateTime.UtcNow.AddDays(1), It.IsAny<bool>()),
+        Throws.TypeOf<StorageException>());
+        _workerStorageContract.Verify(x => x.GetList(It.IsAny<bool>(),
+        It.IsAny<string?>(), It.IsAny<DateTime?>(), It.IsAny<DateTime?>(),
+        It.IsAny<DateTime?>(), It.IsAny<DateTime?>()), Times.Once);
+    }
+    [Test]
+    public void GetWorkerByData_GetById_ReturnRecord_Test()
+    { 
+    //Arrange
+        var id = Guid.NewGuid().ToString();
+        var record = new WorkerDataModel(id, "fio",
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        false);
+        _workerStorageContract.Setup(x =>
+        x.GetElementById(id)).Returns(record);
+        //Act
+        var element = _workerBusinessLogicContract.GetWorkerByData(id);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.Id, Is.EqualTo(id));
+        _workerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetWorkerByData_GetByFio_ReturnRecord_Test()
+    {
+        //Arrange
+        var fio = "fio";
+        var record = new WorkerDataModel(Guid.NewGuid().ToString(), fio,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        false);
+        _workerStorageContract.Setup(x =>
+        x.GetElementByFIO(fio)).Returns(record);
+        //Act
+        var element = _workerBusinessLogicContract.GetWorkerByData(fio);
+        //Assert
+        Assert.That(element, Is.Not.Null);
+        Assert.That(element.FIO, Is.EqualTo(fio));
+        _workerStorageContract.Verify(x =>
+        x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+    }
+    [Test]
+    public void GetWorkerByData_EmptyData_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() => _workerBusinessLogicContract.GetWorkerByData(null),
+        Throws.TypeOf<ArgumentNullException>());
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetWorkerByData(string.Empty),
+        Throws.TypeOf<ArgumentNullException>());
+        _workerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Never);
+        _workerStorageContract.Verify(x =>
+        x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+    [Test]
+    public void GetWorkerByData_GetById_NotFoundRecord_ThrowException_Test()
+    {
+        //Act&Assert
+        Assert.That(() =>
+        _workerBusinessLogicContract.GetWorkerByData(Guid.NewGuid().ToString()),
+        Throws.TypeOf<ElementNotFoundException>());
+        _workerStorageContract.Verify(x =>
+        x.GetElementById(It.IsAny<string>()), Times.Once);
+        _workerStorageContract.Verify(x =>
+        x.GetElementByFIO(It.IsAny<string>()), Times.Never);
+    }
+[Test] 
+public void GetWorkerByData_GetByFio_NotFoundRecord_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.GetWorkerByData("fio"),
+    Throws.TypeOf<ElementNotFoundException>());
+    _workerStorageContract.Verify(x =>
+    x.GetElementById(It.IsAny<string>()), Times.Never);
+    _workerStorageContract.Verify(x =>
+    x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+}
+[Test]
+public void GetWorkerByData_StorageThrowError_ThrowException_Test()
+{
+    //Arrange
+    _workerStorageContract.Setup(x =>
+    x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new
+    InvalidOperationException()));
+    _workerStorageContract.Setup(x =>
+    x.GetElementByFIO(It.IsAny<string>())).Throws(new StorageException(new
+    InvalidOperationException()));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.GetWorkerByData(Guid.NewGuid().ToString()),
+    Throws.TypeOf<StorageException>());
+    Assert.That(() =>
+    _workerBusinessLogicContract.GetWorkerByData("fio"),
+    Throws.TypeOf<StorageException>());
+    _workerStorageContract.Verify(x =>
+    x.GetElementById(It.IsAny<string>()), Times.Once);
+    _workerStorageContract.Verify(x =>
+    x.GetElementByFIO(It.IsAny<string>()), Times.Once);
+}
+[Test]
+public void InsertWorker_CorrectRecord_Test()
+{
+    //Arrange
+    var flag = false;
+    var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false);
+    _workerStorageContract.Setup(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()))
+    .Callback((WorkerDataModel x) =>
+    {
+        flag = x.Id == record.Id && x.FIO == record.FIO &&
+    x.PostId == record.PostId && x.BirthDate == record.BirthDate &&
+    x.EmploymentDate == record.EmploymentDate &&
+    x.IsDeleted == record.IsDeleted;
+    });
+    //Act
+    _workerBusinessLogicContract.InsertWorker(record);
+    //Assert
+    _workerStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    Assert.That(flag);
+}
+[Test]
+public void InsertWorker_RecordWithExistsData_ThrowException_Test()
+{
+    //Arrange 
+    _workerStorageContract.Setup(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>())).Throws(new
+    ElementExistsException("Data", "Data"));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false)), Throws.TypeOf<ElementExistsException>());
+    _workerStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+}
+[Test]
+public void InsertWorker_NullRecord_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.InsertWorker(null),
+    Throws.TypeOf<ArgumentNullException>());
+    _workerStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()), Times.Never);
+}
+[Test]
+public void InsertWorker_InvalidRecord_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.InsertWorker(new
+    WorkerDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-
+    16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ValidationException>());
+    _workerStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()), Times.Never);
+}
+[Test]
+public void InsertWorker_StorageThrowError_ThrowException_Test()
+{
+    //Arrange
+    _workerStorageContract.Setup(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>())).Throws(new StorageException(new
+    InvalidOperationException()));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false)), Throws.TypeOf<StorageException>());
+    _workerStorageContract.Verify(x =>
+    x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
+}
+[Test]
+public void UpdateWorker_CorrectRecord_Test()
+{
+    //Arrange
+    var flag = false;
+    var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false);
+    _workerStorageContract.Setup(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()))
+    .Callback((WorkerDataModel x) =>
+    {
+        flag = x.Id == record.Id && x.FIO == record.FIO &&
+        x.PostId == record.PostId && x.BirthDate == record.BirthDate && 
+        x.EmploymentDate == record.EmploymentDate &&
+        x.IsDeleted == record.IsDeleted;
+    });
+    //Act
+    _workerBusinessLogicContract.UpdateWorker(record);
+    //Assert
+    _workerStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+    Assert.That(flag);
+}
+[Test]
+public void UpdateWorker_RecordWithIncorrectData_ThrowException_Test()
+{
+    //Arrange
+    _workerStorageContract.Setup(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>())).Throws(new
+    ElementNotFoundException(""));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false)), Throws.TypeOf<ElementNotFoundException>());
+    _workerStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+}
+[Test]
+public void UpdateWorker_NullRecord_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.UpdateWorker(null),
+    Throws.TypeOf<ArgumentNullException>());
+    _workerStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Never);
+}
+[Test]
+public void UpdateWorker_InvalidRecord_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.UpdateWorker(new
+    WorkerDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-
+    16).AddDays(-1), DateTime.Now, false)), Throws.TypeOf<ValidationException>());
+    _workerStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Never);
+}
+[Test]
+public void UpdateWorker_StorageThrowError_ThrowException_Test()
+{
+    //Arrange
+    _workerStorageContract.Setup(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>())).Throws(new StorageException(new
+    InvalidOperationException()));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio",
+    Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+    false)), Throws.TypeOf<StorageException>());
+    _workerStorageContract.Verify(x =>
+    x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
+} 
+[Test]
+public void DeleteWorker_CorrectRecord_Test()
+{
+    //Arrange
+    var id = Guid.NewGuid().ToString();
+    var flag = false;
+    _workerStorageContract.Setup(x => x.DelElement(It.Is((string x) => x
+    == id))).Callback(() => { flag = true; });
+    //Act
+    _workerBusinessLogicContract.DeleteWorker(id);
+    //Assert
+    _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+    Times.Once);
+    Assert.That(flag);
+}
+[Test]
+public void DeleteWorker_RecordWithIncorrectId_ThrowException_Test()
+{
+    //Arrange
+    var id = Guid.NewGuid().ToString();
+    _workerStorageContract.Setup(x => x.DelElement(It.Is((string x) => x
+    != id))).Throws(new ElementNotFoundException(id));
+    //Act&Assert
+    Assert.That(() =>
+    _workerBusinessLogicContract.DeleteWorker(Guid.NewGuid().ToString()),
+    Throws.TypeOf<ElementNotFoundException>());
+    _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+    Times.Once);
+}
+[Test]
+public void DeleteWorker_IdIsNullOrEmpty_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.DeleteWorker(null),
+    Throws.TypeOf<ArgumentNullException>());
+    Assert.That(() =>
+    _workerBusinessLogicContract.DeleteWorker(string.Empty),
+    Throws.TypeOf<ArgumentNullException>());
+    _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+    Times.Never);
+}
+[Test]
+public void DeleteWorker_IdIsNotGuid_ThrowException_Test()
+{
+    //Act&Assert
+    Assert.That(() => _workerBusinessLogicContract.DeleteWorker("id"),
+    Throws.TypeOf<ValidationException>());
+    _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+    Times.Never);
+}
+[Test]
+public void DeleteWorker_StorageThrowError_ThrowException_Test()
+{
+    //Arrange
+    _workerStorageContract.Setup(x =>
+    x.DelElement(It.IsAny<string>())).Throws(new StorageException(new
+    InvalidOperationException()));
+    //Act&Assert 
+    Assert.That(() =>
+    _workerBusinessLogicContract.DeleteWorker(Guid.NewGuid().ToString()),
+    Throws.TypeOf<StorageException>());
+    _workerStorageContract.Verify(x => x.DelElement(It.IsAny<string>()),
+    Times.Once);
+}
+}
+

SmallSoftwareProject/SmallSoftwareTests/SmallSoftwareTests.csproj

@@ -11,12 +11,14 @@
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="NUnit" Version="4.2.2" />
     <PackageReference Include="NUnit.Analyzers" Version="4.4.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\SmallSoftwareBusinessLogic\SmallSoftwareBusinessLogic.csproj" />
     <ProjectReference Include="..\SmallSoftwareContracts\SmallSoftwareContracts.csproj" />
   </ItemGroup>