使用Testkit EventListeners使用ScalaTest进行Akka Actor测试

有人能解释一下为什么失败吗？这是Akka文档示例的一个直接复制到规范中。我遗漏了什么

import akka.actor.{ActorSystem, Props, ActorKilledException, Kill}
import akka.testkit.{ TestKit, EventFilter}
import org.scalatest.{FlatSpecLike, BeforeAndAfterAll}
import com.typesafe.config.ConfigFactory

class MySpec() 
  extends TestKit(ActorSystem("testsystem", ConfigFactory.parseString(
    """akka.loggers = ["akka.testkit.TestEventListener"]""")))
  with FlatSpecLike with BeforeAndAfterAll {

  override val afterAll = shutdown(system)
  //afterAll executes without waiting for the EventFilter.intercept, resulting in 
  //  java.lang.IllegalStateException: cannot create children while terminating or terminated
  //  at akka.actor.dungeon.Children$class.makeChild(Children.scala:213)...

  behavior of "MyActor"

  it should "throw an exception when killed" in {
    val actor = system.actorOf(Props.empty)
    EventFilter[ActorKilledException](occurrences = 1) intercept {
      actor ! Kill
    }
  } 
}

在每次测试中保持

关闭

，而不是覆盖

，毕竟

起作用，但当然需要

OneInstancePerTest

it should "throw an exception when killed" in {
  try {
    val actor = system.actorOf(Props.empty)
    EventFilter[ActorKilledException](occurrences = 1) intercept {
      actor ! Kill
    }
  } finally {
    shutdown(system)
  }
} 

我的身材.sbt

lazy val root = (project in file(".")).
  settings(
    name := "TestkitAfterall",
    version := "1.0",
    scalaVersion := "2.11.7"
  )

lazy val akkaVersion = "2.4.0"

libraryDependencies ++=  Seq(
  "com.typesafe.akka" %% "akka-actor" % akkaVersion,
  "com.typesafe.akka" %% "akka-testkit" % akkaVersion,
  "org.scalatest" % "scalatest_2.11" % "2.2.5"
)

---

由于您在

之后

a

val

对其进行了构造评估，并且在运行测试之前将关闭actor系统。将其更改为一种方法（

def

），它将工作。

因为您制作了

之后

a

val

它将在构建时进行评估，并且在运行测试之前，将关闭actor系统。将它更改为一个方法（

def

），它就会工作。

谢谢你，约翰-我想我一定是在做傻事！真的很感谢你花时间回答谢谢你约翰-我想我一定是在做傻事！非常感谢您抽出时间回答