| // 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 LinkedHashMap.fromIterable(Iterable iterable, |
| /// {K key(element), V value(element)}) |
| /// Creates a [LinkedHashMap] where the keys and values are computed from the |
| /// [iterable]. |
| /// @description Checks that if [key] and [value] functions specified then they |
| /// are used for computing elements of this [iterable]. |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| import "dart:collection"; |
| |
| key(element) => element * 2; |
| value(element) => element * 3; |
| |
| check(Iterable it) { |
| LinkedHashMap m = new LinkedHashMap.fromIterable(it, key: key, value: value); |
| Expect.equals(it.length, m.length); |
| for (var v in it) { |
| Expect.equals(v * 3, m[v * 2]); |
| } |
| } |
| |
| main() { |
| check([]); |
| check([-1, 1, 2, 3, 4, 0, 17]); |
| } |