Question

我遇到了Future的问题，该问题未使用whenReady从ScalaTest案例中的演员返回。

以下是测试用例

"A PolicyHolderDAO Actor" must { 
  "return a failure if given a policy holder to update without an id" in { 
    val updatePolicyHolderFailureAny : Future[Any] = policyHolderDAOActor ? PoliHolderDAO.Update(Future(policyHolder))
    val updatePolicyHolderFailure : Future[PolicyHolderDAO.Failure] = updatePolicyHolderFailureAny.mapTo[PolicyHolderDAO.Failure]
    whenReady(updatePolicyHolderFailure, timeout(5 seconds), interval(5 millis)) { failure => 
      failure.error.getMessage must be ("When updating a policy holder, we must have an id")
    }
  }
}

以下是actor的receive方法：

override def receive = {
  case PolicyHolderDAO.Update(policyHolder) => 
    val s = sender
    policyHolder map { p =>
      p match {
        case _ if p.id.isDefined => s ! update(policyHolder)
        case _  => println("HERE"); s ! PolicyHolderDAO.Failure(throw new IllegalArgumentException("When updating a policy holder, we must have an id"), None)
      }
    }
}

Update案例类如下

case class Update(policyHolder : Future[PolicyHolder]

我要做的是检查保单持有人是否有id。如果它有id，请将其传递给update方法，如果它没有id，则返回失败。幸福的道路很好，悲伤的道路似乎也很好，我的意思是println("HERE")被执行。然而，我的测试用例似乎没有收到悲伤路径场景中演员的回复。

以下是错误消息

[info] A PolicyHolderDAO Actor
HERE
[info] - must return a failure if given a policy holder to update without an id *** FAILED ***
[info]   A timeout occurred waiting for a future to complete. Queried 980 times, sleeping 5000000 nanoseconds between each query. (PolicyHolderDAOSystemTest.scala:103)

Answer 1

PolicyHolderDAO.Failure(throw new IllegalArgumentException("When updating a policy holder, we must have an id"), None)

意味着您将抛出IllegalArgumentException，因此不会构造任何消息，并且错误将被发送给actor主管。

你的意思是创建异常并将其返回到消息中，对吗？

PolicyHolderDAO.Failure(new IllegalArgumentException("When updating a policy holder, we must have an id"), None)

为什么Future不会从演员回到ScalaTest的时候准备好？

1 个答案: