LibTest/async/StreamController/StreamController.broadcast_A04_t01.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 factory StreamController.broadcast({void onListen(), void onCancel(), bool sync: false})
 * Each listener is handled independently, and if they pause, only the pausing listener is affected.
 * A paused listener will buffer events internally until unpaused or canceled.
 * @description checks that if a listener is paused, only that listener is affected.
 * Checks that paused listener will buffer events internally.
 */

import "dart:async";
import "../../../Utils/async_utils.dart";
import "../../../Utils/expect.dart";

main() {
  StreamController controller=new StreamController.broadcast();
  Stream stream=controller.stream;
  
  bool event1seen=false;
  StreamSubscription sub1=stream.listen((event){event1seen=true;});
  sub1.pause();
  bool event2seen=false;
  StreamSubscription sub2=stream.listen((event){event2seen=true;});

  controller.add(1);

  runLater(() {
    Expect.isFalse(event1seen);
    Expect.isTrue(event2seen);
    sub1.resume();
    runLater(() {
      Expect.isTrue(event1seen);
      controller.close();
    });
  });
}