Question

在我的TestKit测试中

"A History Actor" must {

    // given
    val historyActorRef = TestActorRef(new HistoryActor("history-file.log"))       // Creation of the TestActorRef
    val writerActorRef = TestActorRef(new WriterActor("history-file.log"))       // Creation of the TestActorRef

    historyActorRef.underlyingActor.writerActor = writerActorRef

    "receive messages and change state" in {  // integration-like test

      // This call is synchronous. The actor receive() method will be called in the current thread

      // when
      historyActorRef ! WriteMsg("line 1")

      // then (1) - got WriteResult (from WriterActor as result of getting WriteMsg)
      within(200 millis) {
        expectMsg(WriteResult(1, 7))
      }

      // then (2) - state
      historyActorRef.underlyingActor.lastWrite must equal(WriteResult(1,7)) // With actorRef.underlyingActor, we can access the react actor instance created by Akka
    }
  }

此测试失败，因为它仍然是WriteResult(0,0)

我HistoryActor的工作方式：

   case cmd: WriteMsg => {

      log.info("forwarding " + cmd + " to the writer" )

      writerActor ! cmd

    }

    case result: WriteResult => {

      log.info("WriteResult: " + result)

      lastWrite = result                  // update the state

    }

那么，当我们检查结果时，如何进行测试以确保WriteResult已经处理过？

P.S。我想我应该考虑单独测试WriterActor，但让我们说我想进行类似集成的测试。

Answer 1

如果你还没有这样做，你需要在TestActorRef s中包装这两个被测试的演员。这将确保两者都使用调用线程调度程序从测试场景中获取异步性。您也可以考虑将writeActor替换为TestProbe进行测试，然后模拟其行为。

<强>更新

根据我的意见：

当您说expectMsg时，您所说的是测试本身（由TestKit引入的隐式发件人）正在从最初发送的消息中接收响应消息以启动测试。我不认为这是你想要断言的，因此我建议你删除它。我认为你试图说写作者收到了那条消息，但这不是测试工具包断言的工作方式。只需验证内部状态是否已更新就足够了

Akka TestKit如何等待处理消息

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