| /* |
| * 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. |
| */ |
| /** |
| * @assertion bool containsKey(Object key) |
| * Returns [true] if this map contains the given [key]. |
| * Returns [true] if any of the keys in the map are equal to [key] according to |
| * the equality used by the map. |
| * @description Checks that [true] is returned if this map contains given [key]. |
| * @author iarkh@unipro.ru |
| */ |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| import "unmodifiablemapbase.lib.dart"; |
| |
| main() { |
| UnmodifiableMapBase base = new UnmodifiableMapBaseImpl({}); |
| Expect.isFalse(base.containsKey(null)); |
| |
| base = new UnmodifiableMapBaseImpl({0 : 0, 1 : 4}); |
| Expect.isFalse(base.containsKey(null)); |
| |
| base = new UnmodifiableMapBaseImpl({0 : 0, null : 15, 1 : 4}); |
| Expect.isTrue(base.containsKey(null)); |
| } |