blob: fbfe05073c2f3dabb4924c0414fb4da3b6c77260 [file] [log] [blame]
// Copyright (c) 2015, 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
library async_star_pause_test;
import "package:async_helper/async_helper.dart";
import "package:expect/expect.dart";
import "dart:async";
main() {
// await for pauses stream during body.
asyncTest(() async {
// Assumes await-for uses streamIterator.
var log = [];
var s = () async* {
for (int i = 0; i < 3; i++) {
log.add("$i-");
yield i;
// Should pause here until next iteration of await-for loop.
log.add("$i+");
}
}();
await for (var i in s) {
log.add("$i?");
await nextMicrotask();
log.add("$i!");
}
Expect.listEquals([
"0-",
"0?",
"0!",
"0+",
"1-",
"1?",
"1!",
"1+",
"2-",
"2?",
"2!",
"2+"
], log);
});
}
Future nextMicrotask() => new Future.microtask(() {});