| // 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.fromIterable(Iterable iterable, |
| /// {K key(element), V value(element), int compare(K key1, K key2), |
| /// bool isValidKey(potentialKey)}) |
| /// @description Checks that if [compare] function specified, then it is used for |
| /// the keys comparison |
| /// @author sgrekhov@unipro.ru |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| bool compareCalled = false; |
| |
| class C { |
| int value; |
| C(this.value); |
| } |
| |
| int compare(var key1, var key2) { |
| compareCalled = true; |
| return key1.value - key2.value; |
| } |
| |
| main() { |
| C c1 = new C(2); |
| C c2 = new C(2); |
| Iterable source = [new C(1), c1, c2]; |
| SplayTreeMap map = new SplayTreeMap.fromIterable(source, compare: compare); |
| |
| Expect.equals(2, map.length); |
| Expect.equals(c2, map[c1]); |
| Expect.isTrue(compareCalled); |
| } |