pekko/akka-docs/rst/scala/code/docs/utils/TestUtils.scala

/**
 * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
 */

package docs.utils

import java.net.InetSocketAddress
import java.nio.channels.ServerSocketChannel

object TestUtils {
  def temporaryServerAddress(interface: String = "127.0.0.1"): InetSocketAddress = {
    val serverSocket = ServerSocketChannel.open()
    try {
      serverSocket.socket.bind(new InetSocketAddress(interface, 0))
      val port = serverSocket.socket.getLocalPort
      new InetSocketAddress(interface, port)
    } finally serverSocket.close()
  }

  def temporaryServerHostnameAndPort(interface: String = "127.0.0.1"): (String, Int) = {
    val socketAddress = temporaryServerAddress(interface)
    socketAddress.getHostName -> socketAddress.getPort // TODO getHostString in Java7
  }
}