| // 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 SplayTreeMap.from(Map other, [int compare(K key1, K key2), |
| /// bool isValidKey(potentialKey)]) |
| /// Creates a [SplayTreeMap] that contains all key/value pairs of [other]. |
| /// @description Checks that if [compare] function specified, then it is used for |
| /// keys comparison |
| /// @author sgrekhov@unipro.ru |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| class C { |
| int value; |
| C(this.value); |
| } |
| |
| int compare(var key1, var key2) { |
| return key1.value - key2.value; |
| } |
| |
| main() { |
| Map source = {new C(1): 1, new C(2): 2, new C(2): 3}; |
| SplayTreeMap map = new SplayTreeMap.from(source, compare); |
| |
| Expect.equals(2, map.length); |
| Expect.equals(3, map[new C(2)]); |
| } |