blob: b422d2550e24f35d793e194b33f32e5e4b7a6d15 [file] [log] [blame]
// 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));
}