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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
58 lines
1.5 KiB
Dart
58 lines
1.5 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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// @dart = 2.9
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import 'package:async_helper/async_helper.dart';
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import "package:expect/expect.dart";
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import 'dart:async';
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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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var controller = new StreamController();
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// Test that stream errors, as a result of bad user-code (`map`) are correctly
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// caught by `catchErrors`. Note that the values are added outside both
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// `catchErrors`, but since the `listen` happens in the most nested
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// `catchErrors` it is caught there.
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catchErrors(() {
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catchErrors(() {
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controller.stream.map((x) {
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throw x;
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}).listen((x) {
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// Should not happen.
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events.add("bad: $x");
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});
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}).listen((x) {
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events.add("caught: $x");
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if (x == 4) done.complete(true);
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}, onDone: () {
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Expect.fail("Unexpected callback");
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});
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}).listen((x) {
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events.add("outer: $x");
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}, onDone: () {
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Expect.fail("Unexpected callback");
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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([
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"caught: 1",
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"caught: 2",
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"caught: 3",
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"caught: 4",
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], events);
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asyncEnd();
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});
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});
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[1, 2, 3, 4].forEach(controller.add);
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controller.close();
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}
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