Akka/Scala example source code file (UdpIntegrationSpec.scala)

This example Akka source code file (UdpIntegrationSpec.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, actorref, akka, bytestring, fly, implicitsender, info, io, received, send, test, testing, testkit, testprobe, to, unit

The UdpIntegrationSpec.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */
package akka.io

import java.net.InetSocketAddress
import akka.testkit.{ TestProbe, ImplicitSender, AkkaSpec }
import akka.util.ByteString
import akka.actor.ActorRef
import akka.io.Udp._
import akka.TestUtils._

class UdpIntegrationSpec extends AkkaSpec("""
    akka.loglevel = INFO
    akka.actor.serialize-creators = on""") with ImplicitSender {

  val addresses = temporaryServerAddresses(3, udp = true)

  def bindUdp(address: InetSocketAddress, handler: ActorRef): ActorRef = {
    val commander = TestProbe()
    commander.send(IO(Udp), Bind(handler, address))
    commander.expectMsg(Bound(address))
    commander.sender()
  }

  val simpleSender: ActorRef = {
    val commander = TestProbe()
    commander.send(IO(Udp), SimpleSender)
    commander.expectMsg(SimpleSenderReady)
    commander.sender()
  }

  "The UDP Fire-and-Forget implementation" must {

    "be able to send without binding" in {
      val serverAddress = addresses(0)
      val server = bindUdp(serverAddress, testActor)
      val data = ByteString("To infinity and beyond!")
      simpleSender ! Send(data, serverAddress)

      expectMsgType[Received].data should be(data)

    }

    "be able to send several packet back and forth with binding" in {
      val serverAddress = addresses(1)
      val clientAddress = addresses(2)
      val server = bindUdp(serverAddress, testActor)
      val client = bindUdp(clientAddress, testActor)
      val data = ByteString("Fly little packet!")

      def checkSendingToClient(): Unit = {
        server ! Send(data, clientAddress)
        expectMsgPF() {
          case Received(d, a) ⇒
            d should be(data)
            a should be(serverAddress)
        }
      }
      def checkSendingToServer(): Unit = {
        client ! Send(data, serverAddress)
        expectMsgPF() {
          case Received(d, a) ⇒
            d should be(data)
            a should be(clientAddress)
        }
      }

      (0 until 20).foreach(_ ⇒ checkSendingToServer())
      (0 until 20).foreach(_ ⇒ checkSendingToClient())
      (0 until 20).foreach { i ⇒
        if (i % 2 == 0) checkSendingToServer()
        else checkSendingToClient()
      }
    }
  }

}