| /* |
| * Copyright (c) 2016, 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 If f is asynchronous then, when f terminates, any open stream |
| * subscriptions associated with any asynchronous for loops or yield-each |
| * statements executing within f are canceled, in the order of their nesting, |
| * innermost first. |
| * |
| * @description Check that stream subscriptions, associated with |
| * asynchronous for loops, are cancelled in innermost first order, when f is |
| * terminated by return. f is asynchronous function. |
| * @author a.semenov@unipro.ru |
| */ |
| import 'dart:async'; |
| import '../../../Utils/expect.dart'; |
| import 'stream_utils.dart' as StreamUtils; |
| |
| Stream makeStream(Iterable iterable, int id, List log) { |
| return StreamUtils.makeStream(iterable, beforeCancel: () { log.add(id); }); |
| } |
| |
| Future f(List log, int skip) async { |
| int i = 0; |
| await for (var s in makeStream(['a', 'b', 'c', 'd'], i++, log)) { |
| await for (var s in makeStream(['a', 'b', 'c', 'd' ], i++, log)) { |
| await for (var s in makeStream(['a', 'b', 'c', 'd'], i++, log)) { |
| await for (var s in makeStream(['a', 'b', 'c', 'd'], i++, log)) { |
| await for (var s in makeStream(['a', 'b', 'c', 'd'], i++, log)) { |
| skip--; |
| if (skip == 0) { |
| return; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| Future test(int skip) async { |
| List log = []; |
| await f(log, skip); |
| Expect.listEquals([4, 3, 2, 1, 0], log); |
| } |
| |
| main() { |
| asyncStart(); |
| Future.wait( |
| [test(1), test(2), test(3)] |
| ).then( |
| (_) => asyncEnd() |
| ); |
| } |