java - Final method mocking

Question

I need mock some class with final method using mockito. I have wrote something like this

@Test
public void test() {
    B b = mock(B.class);
    doReturn("bar called").when(b).bar();   
    assertEquals("must be "overrided"", "bar called", b.bar());
    //bla-bla
}


class B {
    public final String bar() {
        return "fail";
    }
}

But it fails. I tried some "hack" and it works.

   @Test
   public void hackTest() {
        class NewB extends B {
            public String barForTest() {
                return bar();
            }
        }
        NewB b = mock(NewB.class);
        doReturn("bar called").when(b).barForTest();
        assertEquals("must be "overrided"", "bar called", b.barForTest());
    }

It works, but "smells".

So, Where is the right way?

Thanks.

Answer 1

From the Mockito FAQ:

What are the limitations of Mockito

• Cannot mock final methods - their real behavior is executed without any exception. Mockito cannot warn you about mocking final methods so be vigilant.