blob: b97bfd677873ebd4cf98273c7cf14c43f37ba4a1 [file] [log] [blame]
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:async';
import "package:expect/expect.dart";
// Regression test for https://github.com/dart-lang/sdk/issues/33166
void main() async {
// Check that a `null` data handler (like the one passe by `drain`)
// doesn't crash.
{
var stream = new Stream<Object>.fromIterable([1, 2, 3]);
Expect.equals(await stream.cast<int>().drain().then((_) => 'Done'), 'Done');
}
// Check that type errors go into stream error channel.
{
var stream = new Stream<Object>.fromIterable([1, 2, 3]);
var errors = [];
var done = new Completer();
var subscription = stream.cast<String>().listen((value) {
Expect.fail("Unexpected value: $value");
}, onError: (e, s) {
errors.add(e);
}, onDone: () {
done.complete(null);
});
await done.future;
Expect.equals(3, errors.length);
}
}