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Side by Side Diff: tests/lib_strong/async/catch_errors21_test.dart

Issue 2993213003: Migrated test block 167 to Dart 2.0. (Closed)
Patch Set: Created 3 years, 4 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 var controller = new StreamController();
16 // Test that stream errors, as a result of bad user-code (`map`) are correctly
17 // caught by `catchErrors`. Note that the values are added outside both
18 // `catchErrors`, but since the `listen` happens in the most nested
19 // `catchErrors` it is caught there.
20 catchErrors(() {
21 catchErrors(() {
22 controller.stream.map((x) {
23 throw x;
24 }).listen((x) {
25 // Should not happen.
26 events.add("bad: $x");
27 });
28 }).listen((x) {
29 events.add("caught: $x");
30 if (x == 4) done.complete(true);
31 }, onDone: () {
32 Expect.fail("Unexpected callback");
33 });
34 }).listen((x) {
35 events.add("outer: $x");
36 }, onDone: () {
37 Expect.fail("Unexpected callback");
38 });
39
40 done.future.whenComplete(() {
41 // Give handlers time to run.
42 Timer.run(() {
43 Expect.listEquals([
44 "caught: 1",
45 "caught: 2",
46 "caught: 3",
47 "caught: 4",
48 ], events);
49 asyncEnd();
50 });
51 });
52
53 [1, 2, 3, 4].forEach(controller.add);
54 controller.close();
55 }
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