| /* |
| * Copyright (c) 2011, 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> where(bool f(E element)) |
| * Returns a lazy Iterable with all elements that satisfy the predicate test. |
| * Iterating will not cache results, and thus iterating multiple times over the returned |
| * Iterable will invoke the supplied function test multiple times on the same element. |
| * @description Checks that all elements that satisfy test are retained, and |
| * elements that do not, are skipped. |
| * Checks that iterating multiple times over the returned Iterable will invoke |
| * the supplied function test multiple times on the same element. |
| * @author kaigorodov |
| */ |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| import "LinkedList.lib.dart"; |
| |
| void check(LinkedList<MyLinkedListEntry<int>> a0, bool test0(int element)) { |
| bool test(MyLinkedListEntry<int> entry)=>test0(entry.value); |
| |
| for (int k=0; k<5; k++) { |
| Iterator<MyLinkedListEntry<int>> it0=a0.iterator; |
| Iterator<MyLinkedListEntry<int>> it=a0.where(test).iterator; |
| |
| while (it0.moveNext()) { |
| if (test(it0.current)) { |
| Expect.isTrue(it.moveNext()); |
| Expect.identical(it0.current, it.current); |
| } |
| } |
| Expect.isFalse(it.moveNext()); |
| } |
| } |
| |
| main() { |
| LinkedList<MyLinkedListEntry<int>> a0=toLinkedList([1,3,7,4,5,6,1]); |
| check(a0, (int element)=>element==1); |
| return; |
| check(a0, (int element)=>true); |
| check(a0, (int element)=>false); |
| check(a0, (int element)=>element>4); |
| check(a0, (int element)=>element<4); |
| check(a0, (int element)=>element==4); |
| } |