| /* |
| * 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. |
| */ |
| /** |
| * @assertion K lastKey() |
| * Returns [null] if the map is empty. |
| * @description Checks that [null] is returned if the map is empty |
| * @author sgrekhov@unipro.ru |
| */ |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| SplayTreeMap map = new SplayTreeMap(); |
| Expect.isNull(map.lastKey()); |
| } |