floitsch@google.com
48b1656690
According to our typing rules a Set<Apple> is a Set<Fruit>. However, before this change, we couldn't use it as a Set<Fruit>:
===
bool foo(Set<Fruit> fruits) {
// Would yield a type-error since we actually got a Set<Apple>.
return fruits.contains(new Banana());
}
foo(new Set<Apple>());
===
R=ajohnsen@google.com, blois@google.com, lrn@google.com
Review URL: https://codereview.chromium.org//14246008
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24326 260f80e4-7a28-3924-810f-c04153c831b5
29 lines
965 B
Dart
29 lines
965 B
Dart
// Copyright (c) 2011, 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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library stream_controller_async_test;
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import "package:expect/expect.dart";
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import 'dart:async';
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import 'dart:isolate';
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import '../../../pkg/unittest/lib/unittest.dart';
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import 'event_helper.dart';
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import 'stream_state_helper.dart';
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class A { const A(); }
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class B extends A { const B(); }
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main() {
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Events sentEvents = new Events()..close();
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// Make sure that firstWhere allows to return instances of types that are
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// different than the generic type of the stream.
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test("firstWhere with super class", () {
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StreamController c = new StreamController<B>();
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Future f = c.stream.firstWhere((x) => false, defaultValue: () => const A());
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f.then(expectAsync1((v) { Expect.equals(const A(), v); }));
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sentEvents.replay(c);
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});
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}
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