asp.net-mvc - 我应该为 Controller 或服务层还是两者都编写单元测试？

Question

我正在学习并尝试为我的项目使用单元测试。但是当我尝试使用单元测试编写演示时，我看到 Controller 的单元测试与服务层相同。下面是我为 Controller 和服务层编写的单元测试代码

Controller 测试:

  private Mock<ICountryService> _countryServiceMock;
  CountryController objController;
  List<Country> listCountry;

  [TestInitialize]
  public void Initialize()
  {

      _countryServiceMock = new Mock<ICountryService>();
      objController = new CountryController(_countryServiceMock.Object);
      listCountry = new List<Country>() {
       new Country() { Id = 1, Name = "US" },
       new Country() { Id = 2, Name = "India" },
       new Country() { Id = 3, Name = "Russia" }
      };
  }

  [TestMethod]
  public void Country_Get_All()
  {
      //Arrange
      _countryServiceMock.Setup(x => x.GetAll()).Returns(listCountry);

      //Act
      var result = ((objController.Index() as ViewResult).Model) as List<Country>;

      //Assert
      Assert.AreEqual(result.Count, 3);
      Assert.AreEqual("US", result[0].Name);
      Assert.AreEqual("India", result[1].Name);
      Assert.AreEqual("Russia", result[2].Name);

  }

服务测试:

  private Mock<ICountryRepository> _mockRepository;
  private ICountryService _service;
  Mock<IUnitOfWork> _mockUnitWork;
  List<Country> listCountry;

  [TestInitialize]
  public void Initialize()
  {
      _mockRepository = new Mock<ICountryRepository>();
      _mockUnitWork = new Mock<IUnitOfWork>();
      _service = new CountryService(_mockUnitWork.Object, _mockRepository.Object);
      listCountry = new List<Country>() {
       new Country() { Id = 1, Name = "US" },
       new Country() { Id = 2, Name = "India" },
       new Country() { Id = 3, Name = "Russia" }
      };
  }

  [TestMethod]
  public void Country_Get_All()
  {
      //Arrange
      _mockRepository.Setup(x => x.GetAll()).Returns(listCountry);

      //Act
      List<Country> results = _service.GetAll() as List<Country>;

      //Assert
      Assert.IsNotNull(results);
      Assert.AreEqual(3, results.Count);
  }

Answer 1

在 Controller 级别，我倾向于编写端到端测试。没有 mock ，没有假货，只有真实的东西。

原因是在上面的测试中，您的单元测试与 Controller 操作的实现细节耦合。假设您不再使用存储库或工作单元，您的测试甚至将不再编译。在这个级别，您应该关注测试行为，而不是实现。

我对隔离的域模型进行单元测试，其余部分进行集成测试。