| // 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 catchError(Function onError, {bool test(Object error)}) |
| * Handles errors emitted by this Future. |
| * This is the asynchronous equivalent of a "catch" block. |
| * Returns a new Future that will be completed with either the result of |
| * this future or the result of calling the onError callback. |
| * @description Checks that [catchError] returns a new Future f. |
| * @author kaigorodov |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| void onError(Object asyncError) {} |
| |
| void check (Future f1) { |
| Object f2 = f1.catchError(onError); |
| Expect.isTrue(f2 is Future); |
| Expect.isFalse(identical(f1, f2)); |
| } |
| |
| main() { |
| check(new Completer().future); |
| check(new Future.sync(() => 1)); |
| check(new Future.sync(() {throw 1;})); |
| } |