| // Copyright (c) 2019, 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 Torn off extension methods are never equal unless they are |
| /// identical. |
| /// |
| /// @description Check that a static extension method can be torn off like an |
| /// instance method. |
| /// @author sgrekhov@unipro.ru |
| |
| |
| import "../../Utils/expect.dart"; |
| |
| extension ExtendedList on List { |
| int foo(Object x) => x.toString().length; |
| } |
| |
| main() { |
| List list = [1, 2, 3]; |
| int Function(int) func1 = list.foo; |
| int Function(int) func2 = list.foo; |
| |
| Expect.isFalse(func1 == func2); |
| Expect.isTrue(func1 == func1); |
| } |