仍然使用Scala，ScalaTest和Mockito调用Mocked方法

Question

我正在尝试模拟将数据插入数据库的方法。但是，当我尝试模拟该方法时，它仍然被调用。我不知道为什么。这是我的测试：

  //val mockDAO = mock[DAO]
  val mockDAO = spy(new DAO)
  val transObj = TransactionDataObj(-1, 1, 1, 9, 9, DateTime.now(), DateTime.now(), 99, 9969, 3)
  val additionalObj = AdditionalTransData(Some(90), Some(91), Some(92), Some(93), Some(94: Long))
  //stub(mockDAO.addTransaction(transObj, additionalObj)).toReturn(transObj)
  doReturn(transObj).when(mockDAO).addTransaction(transObj, additionalObj)
  //when(mockDAO.addTransaction(transObj, additionalObj)).thenReturn(transObj)

  "ControllerActor" must {
    "create nameless actor when a duplicate arises for the AdderActor" in {
      val controller = system.actorOf(Props[Controller])
      val msg = Add(transObj, additionalObj)
      controller.tell(msg, testActor)
      expectMsg(true)
   }

正如你所看到的，我尝试了各种各样的组合。据此website doReturn不会调用原始方法，但确实如此。对我做错了什么的想法？