模拟HttpResponeBase和HttpRequestBase时出现问题

Question

我有一个mvc 3项目,我想模拟HttpResonseBase和HttpRequestBase.我使用RhinoMocks 3.6来模拟myobjects.我的测试代码右边看起来像这样.

[TestMethod]
public void Test()
{
    MockRepository repo = new MockRepositoy();
    HttpContextBase mockHttpContext= repo.StrictMock<HttpContextBase>();
    HttpRequestBase mockRequest = repo.StrictMock<HttpRequestBase>();
    HttpResponseBase mockResponse = repo.StrictMock<HttpResponseBase>();
    ICookie mockCookie = repo.StrictMock<ICookie>();
    Controller instanceToTest = new Controller(mockCookie);

    SetupResult.For(mockHttpContext.Request).Return(mockRequest);
    SetupResult.For(mockHttpContext.Response).Return(mockResponse);

    mocks.Replay(context);

    instanceToTest.ControllerContext = new ControllerContext(mockHttpContext, new RouteData(), instanceToTest);

    mockCookie.Expect(x=>x.MethodToExpect("Test",mockRequest,mockResponse);


    mockRepository.ReplayAll();
    instanceToTest.MethodToTest();
    mockRepository.VerifyAll();
}

当我运行测试时,我得到了这个错误消息;

Rhino.Mocks.Exceptions.ExpectationViolationException: ICookie.MethodToExpect("Test", System.Web.HttpResponseBase, System.Web.HttpRequestBase); Expected #0, Actual #1.
ICookie.MethodToExpect("Test", HttpResponseBaseProxy); Expected #1, Actual #0.

我究竟做错了什么？

Answer 1

这里的问题是你使用StrictMock- 这意味着如果你在Mock对象上调用一个你没有设置任何期望的方法,那么VerifyAllExpectations就会失败.您可以使用MockRepository.GenerateMock<T>方法而不是StrictMock.
另一种意见是,你最好与坚持RhinoMocks AAA语法(使用Expect,Stub和VerifyAllExpectations方法的替代ReplayAll,SetupResult等...),
这里是你的代码可能看起来怎么样纯AAA语法:

[TestMethod]
public void Test()
{
    // Arrange(A) - create your objects, mocks and stubs
    // The context is a Stub - you just want it to return the mocked request and response
    HttpContextBase mockHttpContext= MockRepository.GenerateStub<HttpContextBase>();
    HttpRequestBase mockRequest = MockRepository.GenerateMock<HttpRequestBase>();
    HttpResponseBase mockResponse = MockRepository.GenerateMock<HttpResponseBase>();
    ICookie mockCookie = MockRepository.GenerateMock<ICookie>();
    Controller instanceToTest = new Controller(mockCookie);

    // Stub will return the mocked request and response on every call (similar to SetupResult)
    mockHttpContext.Stub(x => x.Request).Return(mockRequest);
    mockHttpContext.Stub(x => x.Response).Return(mockResponse);

    instanceToTest.ControllerContext = new ControllerContext(mockHttpContext, new RouteData(), instanceToTest);

    mockCookie.Expect(x=>x.MethodToExpect("Test",mockRequest,mockResponse);

    // Act(A) - do the actual operations on the tested class
    instanceToTest.MethodToTest();

    // Assert (A) - Verify your expectations
    mockCookie.VerifyAllExpectations();
}