non-exhaustive match in actor

test.akka

import akka.actor.Actor
import akka.actor.Actor.actorOf

import org.specs._

object ActorMatchSpec extends Specification {
  "actor match" should {
    "match non-exhaustive" in {
      val actor = actorOf(new Actor {
        def receive:Receive = {
          case "world" =>
        }
      }).start

      actor ! "hello"
    }
  }
}