Mockito doReturn 不使用单例返回 MVC 中的模拟接口

Question

I have A.class to test:

private void register(...) {
    
                ...
        
                abcInterface abc = ControllerFactory.getABCController().getABCInterface(); //returns real interface instead of mock
        
                Call<SOMECLASS> call = abc.subscribe(...);

                Response<SOMECLASS> response = call.execute();

                ...
            }

ControllerFactory.class is a class where single instance of AbcController is instantiated.

I have to mock abcInterface to mock then request and response, and I wrote the following:

@RunWith(MockitoJUnitRunner.Silent.class)
public class ATest {
    
    @Mock
    AbcInterface AbcInterface;
    
    @Mock
    Call<SOMECLASS> request;
    
    @Mock
    ControllerFactory controllerFactory;
    
    @Mock
    AbcController abcControllerMock;
    
    @Before
    public void setup() {
         
        ControllerFactory.createAbcController(); //always single instance is instantiated
    }

    @Test
    public void registerTest() {
         Mockito.doReturn(dmsControllerMock).when(controllerFactory).getDmsController();
      
   Mockito.doReturn(abcInterface).when(abcControllerMock).getAbcInterface();
        
        SOMECLASS response = ...

        Response<SOMECLASS> response = Response.success(200, response);

       Mockito.doReturn(request).when(abcInterface).subscribe(Mockito.any());
        
        Mockito.when(request.execute()).thenReturn(response);
        
        A a = new A(...);
        a.register(...);
    }
}

The problem is that ControllerFactory.getABCController().getABCInterface(); returns real interface instead of mock.

Answer 1

It looks like you forgot to mock the getABCController method, which should return your abcControllerMock , but instead getABCController returns an "real" instance of AbcController which will then return a "real" instance of AbcInterface .

So either mock getABCController or create a constructor for A that accepts a AbcController and then pass in your mock into that constructor when creating the instance of A .