asp.net-mvc – Moq的意外验证行为

Moq让我对我的最新项目感到有点疯狂.我最近升级到版本4.0.10827,我注意到在我看来是一个新的行为.

基本上,当我在我正在测试的代码中调用我的模拟函数(在本例中为MakeCall)时,我传入了一个对象(TestClass).我正在测试的代码在调用MakeCall之前和之后对TestClass对象进行了更改.代码完成后,我会调用Moq的Verify函数.我的期望是,Moq将记录我传入MakeCall的完整对象,可能是通过深度克隆等机制.通过这种方式,我将能够验证MakeCall是否被我希望调用的确切对象调用.不幸的是,这不是我所看到的.

我试图在下面的代码中说明这一点(希望在此过程中澄清一点).

>我首先创建一个新的TestClass对象.它的Var属性设置为“1”.
>然后我创建了模拟对象mockedObject,这是我的测试主题.
>然后我调用mockedObject的MakeCall方法(顺便说一下,示例中使用的Machine.Specifications框架允许从上到下读取When_Testing类中的代码).
>然后我测试模拟对象以确保它确实使用VarC值为“1”的TestClass调用.正如我所预料的那样,这成功了.
>然后我通过将Var属性重新分配给“two”来更改原始TestClass对象.
>然后我继续尝试验证Moq是否仍然认为使用值为“1”的TestClass调用了MakeCall.这失败了,虽然我期待它是真的.
>最后,我测试看看Moq是否认为MakeCall实际上是由一个值为“2”的TestClass对象调用的.这成功了,虽然我最初预计它会失败.

对我来说,似乎很清楚Moq只保留对原始TestClass对象的引用,允许我改变其值而不受惩罚,对我的测试结果产生负面影响.

关于测试代码的一些注意事项. IMyMockedInterface是我嘲笑的界面. TestClass是我传递给MakeCall方法的类,因此用于演示我遇到的问题.最后,When_Testing是包含测试代码的实际测试类.它使用Machine.Specifications框架,这就是为什么有一些奇怪的项目(‘因为’,’它应该…’).这些只是框架调用以执行测试的委托.如果需要,应该很容易删除它们并将包含的代码放入标准函数中.我把它保留为这种格式,因为它允许所有Validate调用完成(与’Arrange,Act Assert’范例相比).只是为了澄清,下面的代码不是我遇到问题的实际代码.它只是为了说明问题,因为我在多个地方看到了同样的行为.

using Machine.Specifications;
// Moq has a conflict with MSpec as they both have an 'It' object.
using moq = Moq;

public interface IMyMockedInterface
{
    int MakeCall(TestClass obj);
}

public class TestClass
{
    public string Var { get; set; }

    // Must override Equals so Moq treats two objects with the 
    // same value as equal (instead of comparing references).
    public override bool Equals(object obj)
    {
        if ((obj != null) && (obj.GetType() != this.GetType()))
            return false;
        TestClass t = obj as TestClass;
        if (t.Var != this.Var)
            return false;
        return true;
    }

    public override int GetHashCode()
    {
        int hash = 41;
        int factor = 23;
        hash = (hash ^ factor) * Var.GetHashCode();
        return hash;
    }

    public override string ToString()
    {
        return MvcTemplateApp.Utilities.ClassEnhancementUtilities.ObjectToString(this);
    }
}

[Subject(typeof(object))]
public class When_Testing
{
    // TestClass is set up to contain a value of 'one'
    protected static TestClass t = new TestClass() { Var = "one" };
    protected static moq.Mock<IMyMockedInterface> mockedObject = new moq.Mock<IMyMockedInterface>();
    Because of = () =>
    {
        mockedObject.Object.MakeCall(t);
    };

    // Test One
    // Expected:  Moq should verify that MakeCall was called with a TestClass with a value of 'one'.
    // Actual:  Moq does verify that MakeCall was called with a TestClass with a value of 'one'.
    // Result:  This is correct.
    It should_verify_that_make_call_was_called_with_a_value_of_one = () =>
        mockedObject.Verify(o => o.MakeCall(new TestClass() { Var = "one" }),moq.Times.Once());

    // Update the original object to contain a new value.
    It should_update_the_test_class_value_to_two = () =>
        t.Var = "two";

    // Test Two
    // Expected:  Moq should verify that MakeCall was called with a TestClass with a value of 'one'.
    // Actual:  The Verify call fails,claiming that MakeCall was never called with a TestClass instance with a value of 'one'.
    // Result:  This is incorrect.
    It should_verify_that_make_call_was_called_with_a_class_containing_a_value_of_one = () =>
        mockedObject.Verify(o => o.MakeCall(new TestClass() { Var = "one" }),moq.Times.Once());

    // Test Three
    // Expected:  Moq should fail to verify that MakeCall was called with a TestClass with a value of 'two'.
    // Actual:  Moq actually does verify that MakeCall was called with a TestClass with a value of 'two'.
    // Result:  This is incorrect.
    It should_fail_to_verify_that_make_call_was_called_with_a_class_containing_a_value_of_two = () =>
        mockedObject.Verify(o => o.MakeCall(new TestClass() { Var = "two" }),moq.Times.Once());
}

我有几个问题：

这是预期的行为吗？
这是新的行为吗？
有没有我不知道的解决方法？
我错误地使用了验证吗？
有没有更好的方法使用Moq来避免这种情况？

我谦卑地感谢你提供任何帮助.

编辑：
这是我遇到此问题的实际测试和SUT代码之一.希望它可以作为澄清.

// This is the MVC Controller Action that I am testing.  Note that it 
// makes changes to the 'searchProjects' object before and after 
// calling 'repository.SearchProjects'.
[HttpGet]
public ActionResult List(int? page,[Bind(Include = "Page,SearchType,SearchText,BeginDate,EndDate")] 
    SearchProjects searchProjects)
{
    int itemCount;
    searchProjects.ItemsPerPage = profile.ItemsPerPage;
    searchProjects.Projects = repository.SearchProjects(searchProjects,profile.UserKey,out itemCount);
    searchProjects.TotalItems = itemCount;
    return View(searchProjects);
}


// This is my test class for the controller's List action.  The controller 
// is instantiated in an Establish delegate in the 'with_project_controller' 
// class,along with the SearchProjectsRequest,SearchProjectsRepositoryGet,// and SearchProjectsResultGet objects which are defined below.
[Subject(typeof(ProjectController))]
public class When_the_project_list_method_is_called_via_a_get_request
    : with_project_controller
{
    protected static int itemCount;
    protected static ViewResult result;
    Because of = () =>
        result = controller.List(s.Page,s.SearchProjectsRequest) as ViewResult;

    // This test fails,as it is expecting the 'SearchProjects' object 
    // to contain:
    // Page,EndDate and ItemsPerPage
    It should_call_the_search_projects_repository_method = () =>
        s.Repository.Verify(r => r.SearchProjects(s.SearchProjectsRepositoryGet,s.UserKey,out itemCount),moq.Times.Once());

    // This test succeeds,EndDate,ItemsPerPage,// Projects and TotalItems
    It should_call_the_search_projects_repository_method = () =>
        s.Repository.Verify(r => r.SearchProjects(s.SearchProjectsResultGet,moq.Times.Once());

    It should_return_the_correct_view_name = () =>
        result.ViewName.ShouldBeEmpty();

    It should_return_the_correct_view_model = () =>
        result.Model.ShouldEqual(s.SearchProjectsResultGet);
}


/////////////////////////////////////////////////////
// Here are the values of the three test objects
/////////////////////////////////////////////////////

// This is the object that is returned by the client.
SearchProjects SearchProjectsRequest = new SearchProjects()
{
    SearchType = SearchTypes.ProjectName,SearchText = GetProjectRequest().Name,Page = Page
};

// This is the object I am expecting the repository method to be called with.
SearchProjects SearchProjectsRepositoryGet = new SearchProjects()
{
    SearchType = SearchTypes.ProjectName,Page = Page,ItemsPerPage = ItemsPerPage
};

// This is the complete object I expect to be returned to the view.
SearchProjects SearchProjectsResultGet = new SearchProjects()
{
    SearchType = SearchTypes.ProjectName,ItemsPerPage = ItemsPerPage,Projects = new List<Project>() { GetProjectRequest() },TotalItems = TotalItems
};

解决方法

从逻辑的角度来看,我认为这是一个合理的期望.您正在执行值为Y的操作X.如果您询问模拟“我是否执行了值为Y的操作X”,则无论系统的当前状态如何,您都希望它为“是”.

总结您遇到的问题：

（编辑：安卓应用网）

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