| // Copyright (c) 2013, 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. |
| /// This method returns a view of the mapped elements. |
| /// @description Checks that the returned [Iterable] contains all elements from |
| /// [this] that satisfy [test], and all other elements are skipped. |
| /// @author msyabro |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Float32x4 pack(v) => new Float32x4.splat(v); |
| |
| equal(obj1, obj2) { |
| var res = obj1.equal(obj2); |
| return res.flagX && res.flagY && res.flagZ && res.flagW; |
| } |
| |
| void check(List<Float32x4> list, bool test (Float32x4 element)) { |
| var l = new Float32x4List.fromList(list); |
| var res = l.where(test); |
| |
| var count = 0; |
| |
| for (int i = 0 ; i < list.length; ++i) { |
| if (test(l[i])) { |
| Expect.isTrue(equal(l[i], res.elementAt(count))); |
| ++count; |
| } |
| } |
| Expect.equals(count, res.length); |
| } |
| |
| main() { |
| check([], (e) => true); |
| check([pack(1.0)], (e) => false); |
| check([pack(1.0), pack(1.0), pack(1.0), pack(2.0), pack(1.0), pack(1.0)], |
| (e) => e.x == 1.0 ); |
| check([pack(0.0), pack(1.0), pack(2.0), pack(3.0), pack(4.0), pack(5.0)], |
| (e) => e.x < 5.0 ); |
| check([pack(0.0), pack(1.0), pack(2.0), pack(3.0), pack(4.0), pack(5.0)], |
| (e) => e.x > 0.0 ); |
| check([pack(0.0), pack(1.0), pack(2.0), pack(3.0), pack(4.0), pack(5.0)], |
| (e) => e.x != 2.0 ); |
| } |