| /* |
| * 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 It also enables const expressions that refer to constant |
| * collections defined elsewhere, which is useful: |
| * |
| * const list = [2, 3]; |
| * const another = [1, ...list, 4]; // [1, 2, 3, 4]. |
| * @description: Checks that spread element in the map can refer to constant |
| * collections defined elsewhere |
| * @author iarkh@unipro.ru |
| */ |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| const map = {2: 20, 3: 30}; |
| const Map map1 = null; |
| |
| const res1 = {1: 10, ...map, 4: 40}; |
| Expect.mapEquals({1: 10, 2: 20, 3: 30, 4: 40}, res1); |
| |
| const res2 = {1: 10, ...?map, 4: 40}; |
| Expect.mapEquals({1: 10, 2: 20, 3: 30, 4: 40}, res2); |
| |
| const res3 = {1: 10, ...?map1, 4: 40}; |
| Expect.mapEquals({1: 10, 4: 40}, res3); |
| } |