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Side by Side Diff: tests/lib_strong/async/catch_errors18_test.dart

Issue 2802973005: Migrate async tests to strong (Closed)
Patch Set: Created 3 years, 8 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4
5 import 'package:async_helper/async_helper.dart';
6 import "package:expect/expect.dart";
7 import 'dart:async';
8 import 'catch_errors.dart';
9
10 main() {
11 asyncStart();
12 Completer done = new Completer();
13
14 var events = [];
15 Stream stream = new Stream.periodic(const Duration(milliseconds: 20),
16 (x) => x);
17 // Test that errors of periodic streams are caught.
18 catchErrors(() {
19 var subscription;
20 subscription = stream.listen((x) {
21 if (x == 5) {
22 events.add("cancel");
23 subscription.cancel();
24 done.complete(true);
25 return;
26 }
27 events.add(x);
28 });
29 }).listen((x) { events.add("outer: $x"); },
30 onDone: () { Expect.fail("Unexpected callback"); });
31
32 done.future.whenComplete(() {
33 // Give handlers time to run.
34 Timer.run(() {
35 Expect.listEquals([0, 1, 2, 3, 4, "cancel"], events);
36 asyncEnd();
37 });
38 });
39 }
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