Robert Nystrom
a2b556b937
Change-Id: Ia5c41dda6503e1fbb8cc6099835d07588425e2ba Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128310 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
31 lines
1005 B
Dart
31 lines
1005 B
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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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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class MyFuture<T> implements Future<T> {
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Future<S> then<S>(FutureOr<S> valueHandler(T x), {Function? onError}) {
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scheduleMicrotask(() {
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valueHandler(null as T);
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});
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return Future.value(null as S);
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}
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catchError(_, {test}) => Future.value(null as T);
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whenComplete(_) => Future.value(null as T);
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asStream() => Stream.value(null as T);
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timeout(Duration timeLimit, {void onTimeout()?}) => Future.value(null as T);
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}
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main() {
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asyncStart();
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Completer completer = new Completer();
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completer.complete(new MyFuture());
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Expect.isTrue(completer.isCompleted);
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Expect.throws(() => completer.complete(42));
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completer.future.then((_) => asyncEnd());
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}
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