| /* |
| * 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> takeWhile(bool test(E value)) |
| * Returns a lazy iterable of the leading elements satisfying test. |
| * @description Checks that the returned iterable contains leading elements of |
| * Int32x4List that satisfy test. |
| * @author ngl@unipro.ru |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Int32x4 i32x4(n) => new Int32x4(n, n, n, n); |
| |
| equal(o1, o2) { |
| return o1.x == o2.x && o1.y == o2.y && o1.z == o2.z && o1.w == o2.w; |
| } |
| |
| check(list, bool test(Int32x4 e)) { |
| var l = new Int32x4List.fromList(list); |
| var res = l.takeWhile(test); |
| var it1 = l.iterator; |
| var it2 = res.iterator; |
| var count = 0; |
| var size = 0; |
| |
| Expect.isTrue(res is Iterable); |
| |
| while (it2.moveNext()) { |
| if (test(it2.current)) { |
| size++; |
| it1.moveNext(); |
| Expect.isTrue(test(it1.current)); |
| Expect.isTrue(equal(it1.current, it2.current)); |
| } else break; |
| } |
| Expect.equals(size, res.length); |
| |
| while (it1.moveNext()) { |
| count++; |
| } |
| Expect.equals(l.length, size + count); |
| } |
| |
| main() { |
| var list = [i32x4(0), i32x4(1), i32x4(2), i32x4(6), i32x4(4), i32x4(5)]; |
| check(list, (e) => true); |
| check(list, (e) => false); |
| check(list, (e) => e.x == 0); |
| check(list, (e) => e.x > 4); |
| check(list, (e) => e.x < 4); |
| check(list, (e) => e.x == 4); |
| } |