// 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.

// @dart = 2.9

/// @assertion Future done
/// Return a future which is completed when the StreamSink is finished.
///
/// If the StreamSink fails with an error, perhaps in response to adding events
/// using add, addError or close, the done future will complete with that error.
///
/// Otherwise, the returned future will complete when either:
///  - all events have been processed and the sink has been closed, or
///  - the sink has otherwise been stopped from handling more events (for
///    example by cancelling a stream subscription).
///
/// @description Checks that returned value is a Future.
/// @author ilya


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

main() {
  Expect.isTrue(new StreamController().done is Future);
}