| // 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> where(bool test(E element)) |
| * Returns a new lazy Iterable with all elements that satisfy the predicate |
| * test. |
| * The matching elements have the same order in the returned iterable as they |
| * have in iterator. |
| * @description Checks that the returned Iterable is correct. |
| * @author ngl@unipro.ru |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Float64x2 f64x2(v) => new Float64x2.splat(v); |
| |
| check(List<Float64x2> list, bool test(Float64x2 e)) { |
| var l = new Float64x2List.fromList(list); |
| var res = l.where(test); |
| var counter = 0; |
| |
| for (int i = 0; i < l.length; ++i) { |
| if (test(l[i])) { |
| Expect.equals(l[i].x, res.elementAt(counter).x); |
| Expect.equals(l[i].y, res.elementAt(counter).y); |
| counter++; |
| } |
| } |
| Expect.equals(counter, res.length); |
| } |
| |
| main() { |
| check([], (e) => true); |
| check( |
| [f64x2(6.0), f64x2(1.0), f64x2(4.0), f64x2(2.0), f64x2(5.0), f64x2(3.0)], |
| (e) => e.x < 4.0); |
| check( |
| [f64x2(1.0), f64x2(2.0), f64x2(2.0), f64x2(4.0), f64x2(5.0), f64x2(5.0)], |
| (e) => e.x > 3.0); |
| } |