| // Copyright (c) 2017, 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion final bool isEmpty |
| /// @description Check that [true] is returned only if the map is empty. |
| /// @author iarkh@unipro.ru |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| UnmodifiableMapView view = new UnmodifiableMapView( |
| {1 : 1, 2 : 23, 37 : 49}); |
| Expect.isFalse(view.isEmpty); |
| |
| view = new UnmodifiableMapView({}); |
| Expect.isTrue(view.isEmpty); |
| } |
