blob: 7576c46508ecd3004d46903707c33cda386d31ca [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.
// @dart = 2.7
import 'dart:async';
import 'package:expect/expect.dart';
/*class: global#Future:checkedInstance*/
/*class: A:checks=[],instance*/
class A<T> {
m(o) => o is FutureOr<T>;
/*class: B:checkedInstance,checks=[],instance,typeArgument*/
class B {}
// TODO(johnniwinther): Do we need the implied `checkedTypeArgument` from
// the `Future<C>` test in `A.m`?
/*class: C:checkedInstance,typeArgument*/
class C {}
/*class: FutureMock:checks=[$isFuture],instance*/
class FutureMock<T> implements Future<T> {
final T value;
Future<T> timeout(Duration timeLimit, {FutureOr<T> onTimeout()}) => null;
Stream<T> asStream() => null;
Future<T> whenComplete(FutureOr action()) => null;
Future<T> catchError(Function onError, {bool test(bool test(Object error))}) {
return null;
Future<S> then<S>(FutureOr<S> onValue(T value), {Function onError}) => null;
main() {
Expect.isTrue(new A<B>().m(new B()));
Expect.isTrue(new A<B>().m(new FutureMock<B>(new B())));
Expect.isFalse(new A<C>().m(new B()));
Expect.isFalse(new A<C>().m(new FutureMock<B>(new B())));