| /* |
| * Copyright (c) 2015, 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 Evaluation of a conditional property extraction expression e of |
| * the form e1?.id is equivalent to the evaluation of the expression |
| * ((x) => x == null?null : x.id)(e1), unless e1 is a type literal, in which |
| * case it is equivalent to e1.m. |
| * @description Check that e1?.id is equivalent to |
| * ((x) => x == null?null : x.id)(e1). Test conditional getter extraction |
| * @author sgrekhov@unipro.ru |
| */ |
| import '../../../Utils/expect.dart'; |
| |
| class A { |
| String get id1 => "id1"; |
| } |
| |
| class C extends A { |
| String get id2 => "id2"; |
| } |
| |
| main() { |
| var c1 = new C() as C?; |
| C? c2 = null; |
| Expect.equals("id1", c1?.id1); |
| Expect.equals("id2", c1?.id2); |
| |
| Expect.isNull(c2?.id1); |
| Expect.isNull(c2?.id2); |
| } |