LibTest/async/StreamController/StreamController.broadcast_A06_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 StreamController.broadcast({void onListen(), void onCancel(),
///                                       bool sync: false})
/// If sync is false, the event will always be fired at a later time, after
/// the code adding the event has completed. In that case, no guarantees are
/// given with regard to when multiple listeners get the events, except that
/// each listener will get all events in the correct order. Each subscription
/// handles the events individually. If two events are sent on an async
/// controller with two listeners, one of the listeners may get both events
/// before the other listener gets any. A listener must be subscribed both when
/// the event is initiated (that is, when add is called) and when the event is
/// later delivered, in order to receive the event.
///
/// @description Checks that if sync is false, the event will be passed to the
/// listener at a later time.
/// @author kaigorodov

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

main() {
  StreamController controller = new StreamController.broadcast(sync: false);
  Stream stream = controller.stream;
  bool onDataCalled = false;
  asyncStart();
  stream.listen(
    (event) {
      onDataCalled = true;
      asyncEnd();
    }
  );
  controller.add(1);
  Expect.isFalse(onDataCalled);
  controller.close();
}