| // Copyright (c) 2016, 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 |
| |
| /// Regression test for --fast-startup. The compiler used to emit inherit calls |
| /// on each fragment even for classes that were already loaded on a different |
| /// fragment. As a result, the inheritance chain was overwritten in non-chrome |
| /// browsers (by using __proto__, we evaded this issue in Chrome). |
| library deferred_inheritance_test; |
| |
| import 'deferred_inheritance_lib2.dart'; |
| import 'deferred_inheritance_lib1.dart' deferred as d; |
| |
| import 'package:expect/expect.dart'; |
| |
| class B extends A {} |
| |
| /// If the check `y is A` is generated as `y.$isA` then the issue is not |
| /// exposed. We use `assumeDynamic` to ensure that we generate as `y instanceof |
| /// A` in JS. |
| @pragma('dart2js:noInline') |
| @pragma('dart2js:assumeDynamic') |
| check(y) => Expect.isTrue(y is A); |
| |
| main() { |
| check(new B()); |
| d.loadLibrary().then((_) { |
| check(new d.C()); |
| check(new B()); // This fails if we overwrite the inheritance chain. |
| }); |
| } |