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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>
35 lines
1 KiB
Dart
35 lines
1 KiB
Dart
// Copyright (c) 2018, 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 'dart:async';
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import "package:expect/expect.dart";
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// Regression test for https://github.com/dart-lang/sdk/issues/33166
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void main() async {
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// Check that a `null` data handler (like the one passe by `drain`)
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// doesn't crash.
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{
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var stream = new Stream<Object>.fromIterable([1, 2, 3]);
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Expect.equals(await stream.cast<int>().drain().then((_) => 'Done'), 'Done');
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}
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// Check that type errors go into stream error channel.
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{
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var stream = new Stream<Object>.fromIterable([1, 2, 3]);
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var errors = [];
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var done = new Completer();
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var subscription = stream.cast<String>().listen((value) {
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Expect.fail("Unexpected value: $value");
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}, onError: (e, s) {
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errors.add(e);
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}, onDone: () {
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done.complete(null);
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});
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await done.future;
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Expect.equals(3, errors.length);
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}
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}
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