java - final方法模拟

Question

我需要使用 mockito 模拟一些带有 final 方法的类。我写了这样的东西

@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";
    }
}

但它失败了。我尝试了一些“hack”并且它有效。

   @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());
    }

它有效，但“有味道”。

那么，正确的方法在哪里？

谢谢。

Answer 1

来自 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.