| /* |
| * 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 list can refer to constant |
| * collections defined elsewhere |
| * @author iarkh@unipro.ru |
| */ |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| const list = [2, 3]; |
| const list1 = null; |
| const res1 = [1, ...list, 4]; |
| Expect.listEquals([1, 2, 3, 4], res1); |
| const res2 = [1, ...?list, 4]; |
| Expect.listEquals([1, 2, 3, 4], res2); |
| const res3 = [1, ...?list1, 4]; |
| Expect.listEquals([1, 4], res3); |
| |
| const set = {2, 3}; |
| const res4 = [1, ...set, 4]; |
| Expect.listEquals([1, 2, 3, 4], res4); |
| const res5 = [1, ...?set, 4]; |
| Expect.listEquals([1, 2, 3, 4], res5); |
| } |