blob: 6bc45ca528df6bdf02660d8f90734c462761a075 [file] [log] [blame]
* Copyright (c) 2011, 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.
* @assertion A class has a set of direct superinterfaces. This set includes
* the interface of its superclass and the interfaces specified in the the
* implements clause of the class.
* interfaces:
* implements typeList
* ;
* @description Checks that a class can indeed specify one or more
* superinterfaces using the implements clause and an instance of this class
* will also be an instance of those interfaces as well as any and all of its
* superclasses' superinterfaces.
* @author pagolubev
import "../../../Utils/expect.dart";
abstract class IA {}
class A implements IA {}
abstract class IB {}
class B extends A implements IB {}
abstract class IC {}
abstract class ID {}
class C extends B implements IC, ID {}
main() {
C c = new C();
Expect.isTrue(c is IA);
Expect.isTrue(c is IB);
Expect.isTrue(c is IC);
Expect.isTrue(c is ID);