| /* |
| * 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 |
| * ifNullExpression: |
| * logicalOrExpression (‘??’ logicalOrExpression)* |
| * |
| * @description Verify several kinds of if-null expressions, logicalOrExpression |
| * is a constant value. |
| * @static-warning |
| * @author a.semenov@unipro.ru |
| */ |
| import '../../../Utils/expect.dart'; |
| |
| main() { |
| Expect.equals(1, 1 ?? 2); |
| Expect.equals(1, 1 ?? 2 ?? 3); |
| Expect.equals(1, 1 ?? 2 ?? 3 ?? 4); |
| Expect.equals(2, null ?? 2); |
| Expect.equals(1, null ?? 1 ?? 2); |
| Expect.equals(1, null ?? 1 ?? 2 ?? 3); |
| Expect.equals(1, null ?? null ?? 1 ?? 2 ?? 3); |
| Expect.equals(true, null ?? true ?? 2 ?? 3); |
| Expect.equals(false, null ?? false ?? 2 ?? 3); |
| Expect.equals('a', 'a' ?? 'bcd'); |
| Expect.equals('abc', 'abc' ?? 'cde' ?? 'fgh'); |
| Expect.equals('abc', null ?? 'abc' ?? 'cde' ?? 'fgh'); |
| } |