| // 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 forEach(Iterable input, dynamic f(element)) |
| /// Any errors will cause the iteration to stop and will be piped through the |
| /// returned Future. |
| /// @description Checks that an error in the action function causes the |
| /// iteration to stop and is piped through the returned Future. |
| /// @author kaigorodov |
| |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| List<int> input = [0,1,2,3,4]; |
| int e2stop = 2; |
| |
| main() { |
| List<bool> operationTrace = new List<bool>.filled(input.length, false); |
| |
| dynamic f(int element) { |
| if (element == e2stop) { |
| throw element; |
| } |
| operationTrace[element] = true; |
| return new Future.sync(() => element); |
| } |
| |
| asyncStart(); |
| Future.forEach(input, f).catchError((Object error) { |
| Expect.equals(e2stop, error); |
| Expect.listEquals([true, true, false, false, false], operationTrace); |
| asyncEnd(); |
| }); |
| } |