| /* |
| * 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> skip(int count) |
| * Returns an [Iterable] that provides all but the first [count] elements. |
| * When the returned iterable is iterated, it starts iterating over this, first |
| * skipping past the initial [count] elements. |
| * After that, the remaining elements are iterated in the same order as in this |
| * iterable. |
| * @description checks that an [Iterable] that skips the first n elements is |
| * returned. |
| * @author iarkh@unipro.ru |
| */ |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| class MyIterable<int> extends Object with IterableMixin { |
| List _content; |
| MyIterable(List list): _content = list; |
| |
| Iterator get iterator { |
| return _content.iterator; |
| } |
| } |
| |
| check(List list, int n) { |
| IterableMixin iterable = new MyIterable(list); |
| Iterable result = iterable.skip(n); |
| Expect.equals(iterable.length - n, result.length); |
| int k = 0; |
| for (var el in result) { |
| Expect.equals(iterable.elementAt(n + k), el); |
| k++; |
| } |
| } |
| |
| main() { |
| check([1, 2, -3, 4], 4); |
| check([1, 2, -3, 4], 0); |
| check([11, 2, -3, 4], 2); |
| check([1, 22, -3, 4], 4); |
| check(const[1, 2, -5, -6, 100], 0); |
| check(const[1, -1, 2, -5, -6], 1); |
| check(const[0, 0, 1, 2, -5, -6], 2); |
| check(const[0, 0, 1, 2, -5, -6], 6); |
| } |