Question

I have a really simple class with two methods; One that will be called and the other that it will call. The idea is to call the OuterMockMethod method BUT mock the InnerMockMethod. Right now I can only seem to mock the OuterMockMethod method.

public class MockClass : IMockInterface {              public virtual MockClass InnerMockMethod()     {       MockClass returnValue;        returnValue = new MockClass();       returnValue.SomeMessage = 'Not mocked';        return returnValue;     }      public virtual MockClass OuterMockMethod()     {       MockClass mock;        mock = new MockClass();        return mock.MockedMethod();     } } 

Now this works, but it isn’t the method I want to mock:

 public void MockTest_Internal()  {      MockClass returnedClass;      MockClass mockProvider;       mockProvider = repository.StrictMock<MockClass>();      mockProvider.Expect(item => item.OuterMockMethod())        .Return(new MockClass { SomeMessage = 'Mocked' });      repository.Replay(mockProvider);       returnedClass = mockProvider.OuterMockMethod();       Assert.IsTrue(returnedClass.SomeMessage == 'Mocked');  } 

As you can see, it calls the OuterMockMethod which it likes but I don’t want that. I want to mock the InnerMockMethod so that when it’s called by the OuterMockMethod it will return what I want it to.

 public void MockTest_Internal()  {      MockClass returnedClass;      MockClass mockProvider;       mockProvider = repository.StrictMock<MockClass>();      mockProvider.Expect(item => item.InnerMockMethod())        .Return(new MockClass { SomeMessage = 'Mocked' });      repository.Replay(mockProvider);       returnedClass = mockProvider.OuterMockMethod();  //Boom angry Rhino       Assert.IsTrue(returnedClass.SomeMessage == 'Mocked');  } 

Answer 1

In this case you need to put the mock on the returned object:

MockClass returnedMock = MockRepository.GenerateMock<MockClass>(); returnedMock.Expect( rm => rm.InnerMockMethod() )             .Return( new MockClass { SomeMessage = 'Mocked' } ); mockProvider.Expect( mp => mp.OuterMockMethod() ).Return (returnedMock );  returnedClass = mockProvider.OuterMockMethod();  ... 

Note that StrictMock has been deprecated. The preferred pattern is now AAA (Arrange, Act, Assert). You can find more info here.