blob: 82448f567de2d95e6aa6c9ac8b53f7d8ea06e160 [file] [log] [blame]
// 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.
// @dart = 2.9
import "dart:async";
import "package:expect/expect.dart";
import "package:async_helper/async_helper.dart";
// Regression test for http://dartbug.com/27205
// If a yield-star completes while the stream is paused, it didn't resume.
main() {
asyncTest(() {
var c = new Completer();
var s = yieldStream(mkStream());
var sub;
sub = s.listen((v) {
sub.pause();
print(v);
Timer.run(sub.resume);
}, onDone: () {
print("DONE");
c.complete(null);
});
return c.future;
});
}
Stream yieldStream(Stream s) async* {
yield* s;
}
Stream mkStream() {
var s = new StreamController(sync: true);
// The close event has to be sent and received between
// the pause and resume above.
// Using a sync controller and a Timer.run(sub.resume) ensures this.
Timer.run(() {
s.add("event");
s.close();
});
return s.stream;
}