| // 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 Iterable<E> getRange(int start, int end) |
| /// Returns an [Iterable] that iterates over the elements in the range [start] to |
| /// [end] exclusive. |
| /// @description Checks result lists with valid ranges. |
| /// @author iarkh@unipro.ru |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(List src, int start, int length) { |
| UnmodifiableListView a = new UnmodifiableListView(src); |
| Iterator dst = a.getRange(start, start + length).iterator; |
| for(int i = 0; dst.moveNext(); i++) { |
| Expect.equals(a[i + start], dst.current); |
| Expect.identical(a[i + start], dst.current); |
| } |
| } |
| |
| main() { |
| |
| List l = [1, 189, -14, null, 12345]; |
| check(l, 0, 5); |
| check(l, 0, 1); |
| check(l, 1, 3); |
| check(l, 3, 1); |
| |
| l = new List.filled(100, 0); |
| for (var i = 0; i < l.length; i++){ |
| l[i] = i; |
| } |
| check(l, 0, 100); |
| check(l, 0, 1); |
| check(l, 99, 1); |
| check(l, 90, 9); |
| } |