LibTest/isolate/Isolate/spawnUri_A01_t04.dart

/*
 * Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion Future<Isolate> spawnUri(Uri uri, List<String> args, message)
 * Creates and spawns an isolate that runs the code from the library with the specified URI.
 * The isolate starts executing the top-level main function of the library with the given URI.
 * The target main may have one of the four following signatures:
 * main()
 * main(args)
 * main(args, message)
 * When present, the argument message is set to the initial message.
 * When present, the argument args is set to the provided args list.
 * Returns a future that will complete with an Isolate instance.
 * The isolate instance can be used to control the spawned isolate.
 * @description Checks that chained spawning of 10 isolates works properly.
 * @author kaigorodov
 */
import "dart:isolate";
import "../../../Utils/expect.dart";
import "../../../Utils/async_utils.dart";

void main(List args, SendPort replyPort) {
  var n=args.length==0?10:args[0];
  var receivePort = new ReceivePort();
  void reply() {
      if (replyPort!=null) {
        replyPort.send(n);
      }
  }
  
  if (n>0) {
    asyncStart();
    Isolate.spawnUri(new Uri.file("spawnUri_A01_t04.dart"), [n-1], receivePort.sendPort);
    receivePort.listen((var message) {
      Expect.equals(n-1, message);
      receivePort.close();
      reply();
      asyncEnd();
    });
  } else {
    reply();
  }
}