如何在控制器中模拟Automapper(IMapper) [英] How to mock Automapper (IMapper) in controller

问题描述

我正在尝试为现有的MVC Web应用程序编写单元测试.因为我在automapper( IMapper )中遇到了一些问题，每当使用map函数时，它都会返回 null 值.

I am trying to write a unit test for my existing MVC Web Aplication. In that I am facing some problem in automapper (IMapper) Whenever am using map function it returns null value.

我的控制器代码:

public class UserAdministrationController : BaseController
{
    private readonly iUserService _userService;
    private readonly IMapper _mapper;

    public NewsController(iUserService userService, IMapper mapper)
    {
        _userService = userService;
        _mapper = mapper;
    }

    public ActionResult Create(int CompanyID == 0)
    {            
        UserDetail data = _userService(CompanyID);
        var Modeldata = _mapper.Map<UserDetailViewModel, UserDetail>(data);
        return View(Modeldata);
    }
} 

模拟映射代码:

public class MappingDataTest : CommonTestData
{
    public Mock<IMapper> MappingData()
    {
        var mappingService = new Mock<IMapper>();
        UserDetailViewModel interview = getUserDetailViewModel(); // get value of UserDetailViewModel
        UserDetail im = getUserDetail(); // get value of UserDetails

        mappingService.Setup(m => m.Map<UserDetail, UserDetailViewModel>(im)).Returns(interview);
        mappingService.Setup(m => m.Map<UserDetailViewModel, UserDetail>(interview)).Returns(im);

        return mappingService;
    }
}

模拟代码:

[TestClass]
public class UserAdminControllerTest
{
    private MappingDataTest _common;

    [TestInitialize]
    public void TestCommonData()
    {
        _common = new MappingDataTest();
    }

    [TestMethod]
    public void UserCreate()
    {
        //Arrange                                               
        UserAdministrationController controller = new UserAdministrationController(_common.mockUserService().Object, _common.MappingData().Object);
        controller.ControllerContext = _common.GetUserIdentity(controller);

        // Act
        ViewResult newResult = controller.Create() as ViewResult;

        // Assert
        Assert.IsNotNull(newResult);
    }
}

映射器无法正常工作，始终在控制器中显示 null 值.请帮助我.预先感谢.

Mapper is not working its always showing the null value in controller. kindly help me. Thanks in Advance.

推荐答案

您应尝试以下操作:

public class MappingDataTest : CommonTestData
{
    public Mock<IMapper> MappingData()
    {
        var mappingService = new Mock<IMapper>();

        UserDetail im = getUserDetail(); // get value of UserDetails

        mappingService.Setup(m => m.Map<UserDetail, UserDetailViewModel>(It.IsAny<UserDetail>())).Returns(interview); // mapping data
        mappingService.Setup(m => m.Map<UserDetailViewModel, UserDetail>(It.IsAny<UserDetailtViewModel>())).Returns(im); // mapping data

        return mappingService;
    }
}

问题是，您的模拟期望的是UserDetailViewModel采访的确切实例= getUserDetailViewModel();设置此映射，这就是为什么它返回null的原因.它将为空，它将期望对UserDetailViewModel的任何引用；对于对UserDetailtViewModel的任何引用，它将返回预期的映射实例.

The thing is, your mock was expecting the exact instance of UserDetailViewModel interview = getUserDetailViewModel(); to setup this mapping, and this is why it was returning null. Null it will be expecting any reference to UserDetailViewModel and for any reference to UserDetailtViewModel it will return the expected mapped instance.

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