具有任何参数的Mockito when（）无法按预期方式工作

Question

我要对 service.method（）进行单元测试，该测试最后一次调用 dao.method（a，b）返回一个列表。我已经成功设置了模拟dao并注入了 service（选中service.dao == dao）。

然后我尝试

Mockito.when(dao.method(Mockito.any(A.class), Mockito.any(B.class)))
    .thenReturn(myList);

List aList = dao.method(new A(), new B());

List bList = service.method();

我得到了预期的 aList == myList ，但是 bList！= myList 始终是一个空列表（myList不为空）。

这是预期的行为吗？如果没有，我在哪里做错了？

服务等级

@Service
public class Service{
    @Autowired
    Dao dao;

    @Transactional
    public List method() {
        ...
        A a = ...;
        B b = ...;
        return dao.method(a, b);
    }
}

单元测试班

@RunWith(SpringJUnit4ClassRunner.class)
public class ServiceTest {
    @Autowired
    @InjectMocks
    Service service;

    @Mock
    Dao dao;

    @Before
    public void before() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void testMethod() throws Exception {
        List<A> myList = Lists.newArrayList();
        myList.add(Mockito.mock(A.class));
        Mockito.when(dao.method(Mockito.any(A.class), Mockito.any(B.class))).thenReturn(myList);
        List<A> aList = dao.method(new A(), new B());
        List<A> bList  = service.method();
        List<A> cList = service.method();
        System.out.println("dao=" + (dao == service.dao)); // true
        System.out.println("aList=" + (aList == myList)); // true
        System.out.println("bList=" + (bList == myList)); // false
        System.out.println("cList=" + (bList == cList)); // false
    }
}