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();
  }
}