犀牛模拟仿制药问题

Question

I have an interface that I need to mock -

 public interface IRepositoryCachable  
 {
     IEnumerable<T> All<T>() where T : ICacheEntity;
     void Delete<T>(T item) where T : ICacheEntity;
     void Add<T>(T item) where T : ICacheEntity;
     void Update();
     T SingleOrDefault<T>(Func<T, bool> predicate) where T : ICacheEntity;
     IEnumerable<T> Find<T>(Func<T, bool> predicate) where T : ICacheEntity;
 }

Here is my test -

var repo = MockRepository.GenerateMock<IRepositoryCachable>();
repo.Expect(x => x.Add(Arg<ICacheEntity>.Is.Anything));

testClass = new testclass(repo);

testClass.Add;

repo.VerifyAllExpectations();

testClass.Add calls repo.Add . But in VerifyAllExpectation(); it barfs stating that Add was not called.

Code for test class - pseudo -

public class TestClass
{
    public void Add()
    {
         _repo.Add( new CacheEntity());
    }
}

What Am I doing wrong?

Answer 1

为什么要测试实现详细信息（称为什么？）而不是行为（将其添加到数据库中，或者返回缓存的实体，等等）？

Answer 2

This line seems suspect:

testClass.Add; 

Should a parameter be passed to this method? I don't even see how this can compile to be honest.

Answer 3

Use GenerateStub instead of GenerateMock . Stubs are usually used for interfaces. I usually only use mocks when I'm mocking out actual class members.

Answer 4

What is happening here I think is that you are setting up an expectation for the method Add to be called but this method is distinct from Add which is the method you are really calling.

In short either change you expectation to:

repo.Expect(x => x.Add(Arg<CacheEntity>.Is.Anything));

Or change your non-test code to: _repo.Add<ICacheEntity>(new CacheEntity());

I am assuming you will not want to do the second since you put a generic parameter on that method and the only reason to do that is because you need to have the parameter be typed to the concrete type.