dart-sdk/tests/language_2/async_star/async_star2_regression_test.dart
Lasse R.H. Nielsen af75314a9b Fix bug in NNBD stream controller.
Add regression test.

Change-Id: I8c6501cbac86122f9a0441c5e0155a823ce99028
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/130862
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Leaf Petersen <leafp@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>
2020-01-14 09:17:45 +00:00

31 lines
668 B
Dart

// Copyright (c) 2020, 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.
library async_start_test;
import "dart:async";
import "package:expect/expect.dart";
void main() async {
var results = [];
f() async* {
yield 0;
yield 1;
yield 2;
}
//Broken, the value 1 was lost.
await for (var i in f()) {
results.add(i);
if (i == 0) {
// This should pause the stream subscription.
await Future.delayed(Duration(milliseconds: 500));
}
}
Expect.listEquals([0, 1, 2], results);
}