工作单位起订 [英] Moq Unit of Work

问题描述

我是新来的单元测试，我想创建我的搜索功能的测试。我的服务层看起来是这样的：

I am new to unit testing and I want to create a test for my search feature. My service layer looks something like:

public class EmployeeService: BaseService, IEmployeeService
{
    public EmployeeService(IUnitOfWork unitOfWork) : base(unitOfWork)
    {
        _employeeRepo = unitOfWork.EmployeeRepository;
    }

    public IEnumerable<Employee> Search(Employee advancedSearch, int[] divisionIds, bool showInactive, int pageSize, int? page)
    {
        return _employeeRepo.Search(advancedSearch, divisionIds, showInactive, pageSize, page);
    }
}

单元测试：

Unit Test:

[Test]
public void SearchShouldFilterActiveEmployees()
{
    var employees = new List<Employee>
    {
        new Employee { EmployeeId = 105, FirstName = "John", LastName = "Smith", IsActive = true },
        new Employee { EmployeeId = 162, FirstName = "John", LastName = "Doe", IsActive = true },
        new Employee { EmployeeId = 3, FirstName = "Jan", LastName = "Doe", IsActive = true }
    };

    var mockUnitOfWork = new Mock<IUnitOfWork>();

    var sut = new EmployeeService(mockUnitOfWork.Object);

    var employeeSearchCriteria = new Employee
    {
        FirstName = "John"
    };

    var employeesReturned = sut.Search(employeeSearchCriteria, null, false, 25, 1);

    Assert.IsTrue(employeesReturned.Count() == 2);
}

我认为这个问题是嘲讽的UnitOfWork 。我得到一个空引用异常。我怎样才能起订量的的UnitOfWork 这样我就可以测试正在从搜索返回的员工正确的号码。

I think the issue is with mocking the UnitOfWork. I am getting a Null Reference Exception. How can I moq the UnitOfWork so I can test that the correct number of employees is being returned from the Search.

推荐答案

有关嘲讽库这将是最简单的创建一个接口为它，例如： IEmployeeRepo 。然后在的EmployeeService 类领域将是私人只读IEmployeeRepo _employeeRepo 。

For mocking the repository it would be the easiest to create an interface for it, e.g. IEmployeeRepo. Then in the EmployeeService class the field would be private readonly IEmployeeRepo _employeeRepo.

在测试然后你可以验证搜索被调用。

In the test you could then verify that Search was called.

bool searchwasCalled = false;
Mock<IEmployeeRepo> repositoryMock = new Mock<IEmployeeRepo>();
repositoryMock.Setup(r => r.Search(
    It.IsAny<Employee>(), It.IsAny<int[]>(), It.IsAny<bool>(), It.IsAny<int>(),
    It.IsAny<int?>()))
    .Callback(() => searchwasCalled = true);

var mockUnitOfWork = new Mock<IUnitOfWork>();
mockUnitOfWork.Setup(uow => uow.EmployeeRepository).Returns(repositoryMock.Object);

var sut = new EmployeeService(mockUnitOfWork.Object);

var employeeSearchCriteria = new Employee
{
    FirstName = "John"
};

sut.Search(employeeSearchCriteria, null, false, 25, 1);

Assert.IsTrue(searchwasCalled, "Search was not called.");  

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