Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
47 lines
1.0 KiB
Dart
47 lines
1.0 KiB
Dart
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library async_star_pause_test;
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import "package:async_helper/async_helper.dart";
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import "package:expect/expect.dart";
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import "dart:async";
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main() {
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// await for pauses stream during body.
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asyncTest(() async {
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// Assumes await-for uses streamIterator.
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var log = [];
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var s = () async* {
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for (int i = 0; i < 3; i++) {
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log.add("$i-");
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yield i;
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// Should pause here until next iteration of await-for loop.
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log.add("$i+");
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}
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}();
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await for (var i in s) {
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log.add("$i?");
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await nextMicrotask();
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log.add("$i!");
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}
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Expect.listEquals([
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"0-",
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"0?",
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"0!",
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"0+",
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"1-",
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"1?",
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"1!",
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"1+",
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"2-",
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"2?",
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"2!",
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"2+"
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], log);
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});
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}
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Future nextMicrotask() => new Future.microtask(() {});
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