testing - 如何测试 Actor ？

Question

我有一个 Actor ，它在其中一条消息上运行这个方法:

def addAuctions(actions:List[String]): Unit = {
var i = 0
for(auction <- actions) {
  val x = context.actorOf(Props(new Auction(auction, AUCTION_LIMIT_IN_SECONDS, self)), "auction" + i)
  x ! Auction.Init
  i= i+1
}

然后我有以下测试:

"seller" in {
  val seller = system.actorOf(Props[Seller],"seller")
  seller ! Seller.NewAuctions(List("Laptop"))

  // HERE - HOW TO TEST IT ?

}

如何测试卖家是否发送消息 Auction.Init ？

Answer 1

Akka site 上有一个关于测试 actors 的好教程。 .

实现您想要的目标的一种直接方法是将创建委托(delegate)参与者的代码提取到它自己的方法中，然后用测试探针覆盖它。因此，您可以按照以下方式做一些事情。

class Foo extends Actor {
  // Suppose this is called after receiving a message called DoSomething
  def doSomething(): Unit = delegateActor ! SomeMsg
  def delegateActor: ActorRef = context.actorOf(Props(...))
}

在你的测试代码中，

class TestFoo(dActor: ActorRef) extends Foo {
  override def delegateActor = dActor
}

"test" in {
  val probe = TestProbe()
  val foo = TestActorRef(new TestFoo(probe))
  foo ! DoSomething
  probe.expectMsg(SomeMsg)
}