| // 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 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 if synchronous methods resulted in an error, |
| /// while there was no active future, the done future completes with that error. |
| /// @author ilya |
| |
| import "dart:async"; |
| |
| main() { |
| var c = new StreamController(); |
| |
| c.done |
| .then((x) { |
| print('completed with value $x'); |
| }) |
| .catchError((x) { |
| print('completed with error $x'); |
| }); |
| |
| c.addError(1); |
| |
| c.stream.listen(null, onError: (_) {}); |
| |
| c.close() |
| .then((x) { |
| print('completed with value $x'); |
| }) |
| .catchError((x) { |
| print('completed with error $x'); |
| }); |
| } |