Robert Nystrom
d3904f5a54
Change-Id: I6ccbe1494165c2bda142ece13584c4738e3b43e6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425347 Commit-Queue: Lasse Nielsen <lrn@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
55 lines
1.3 KiB
Dart
55 lines
1.3 KiB
Dart
// Copyright (c) 2013, 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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import 'dart:async';
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import 'package:expect/async_helper.dart';
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import 'package:expect/expect.dart';
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import 'catch_errors.dart';
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main() {
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asyncStart();
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Completer done = new Completer();
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var events = [];
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Stream stream = new Stream.periodic(
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const Duration(milliseconds: 20),
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(x) => x,
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);
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// Test that asynchronous callbacks in the done-handler of streams (here
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// the `catchErrors`-stream) keep a zone alive.
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catchErrors(() {
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var subscription;
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subscription = stream
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.take(5)
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.listen(
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(x) {
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events.add(x);
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},
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onDone: () {
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new Future.delayed(const Duration(milliseconds: 30), () {
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events.add(499);
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done.complete(true);
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});
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},
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);
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}).listen(
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(x) {
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events.add("outer: $x");
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},
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onDone: () {
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Expect.fail("Unexpected callback");
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},
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);
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done.future.whenComplete(() {
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// Give handlers time to run.
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Timer.run(() {
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Expect.listEquals([0, 1, 2, 3, 4, 499], events);
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asyncEnd();
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});
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});
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}
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