Spy on class member method call

Question

I would like write something like this :

this.spyObject = Mockito.spy(myObject);
...
verify(this.spiedObject, atLastOnce()).getMember().doSomething(any(OneClass.class))

or

this.spyObject = Mockito.spy(myObject);
...
verify(this.spiedObject.getMember(), atLastOnce()).doSomething(any(OneClass.class))

in a Junit test, knowing that the constructor of myObject is

public MyObject() {
    this.member = new Member()
}

Obviously, it doesn't works !

Finally, I would be able to verify doSomething was called on the member. I'm pretty beginner with Mockito :)

Any help please ?

Answer 1

It sounds like you want Member to be a spy too. In this case, you could do something like this:

@RunWith(MockitoJUnitRunner.class)    
public class SomeTestClass {
    private MyObject myObjectSpy;
    private Member memberSpy;

    @Test
    public void someTest() {
        memberSpy = spy(Member.class);
        myObjectSpy = spy(MyObject.class);
        doReturn(memberSpy).when(myObjectSpy).getMember();
        ...
        verify(memberSpy, atLeastOnce()).doSomething(any(OneClass.class));
    }
}

Be warned, including doReturn(...) with a spy is partial mocking if you intend to only mock getMember() and not its other functions. In that case, consider using a full mock and deciding what the return values of its other functions should be.