LibTest/isolate/Isolate/spawnUri_A01_t04.dart

/*
 * Copyright (c) 2011-2016, 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,
 *                                     { bool paused: false,
 *                                       SendPort onExit,
 *                                       SendPort onError,
 *                                       bool errorsAreFatal,
 *                                       bool checked,
 *                                       Map<String, String> environment,
 *                                       Uri packageRoot,
 *                                       Uri packageConfig,
 *                                       bool automaticPackageResolution: false
 *                                     }
 *                                    )
 *     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 must be callable with zero, one or two arguments.
 *  Examples:
 *   main()
 *   main(args)
 *   main(args, message)
 *     When present, the parameter args is set to the provided args list. When
 *  present, the parameter message is set to the initial message.
 *
 * @description Checks that chained spawning of 10 isolates works properly.
 *
 * @author kaigorodov
 */
import "dart:isolate";
import "../../../Utils/expect.dart";

void main(List<String> args, SendPort? replyPort) {
  int n = args.length == 0 ? 10 : int.parse(args[0]);
  ReceivePort receivePort = new ReceivePort();

  void reply() {
    if (replyPort != null) {
      replyPort.send(n);
    }
  }

  if (n > 0) {
    if (n == 10) {
      asyncStart();
    }
    receivePort.listen((var message) {
      receivePort.close();
      Expect.equals(n - 1, message);
      reply();
      if (n == 10) {
        asyncEnd();
      }
    });
    Isolate.spawnUri(new Uri.file("spawnUri_A01_t04.dart"),
        [(n - 1).toString()], receivePort.sendPort);
  } else {
    reply();
  }
}