| // 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. |
| /// This method returns a view of the mapped elements. |
| /// @description Checks that the returned iterable contains all 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) => 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.where(test); |
| var count = 0; |
| |
| Expect.isTrue(res is Iterable); |
| Expect.runtimeIsType<Iterable>(res); |
| for (int i = 0; i < l.length; ++i) { |
| if (test(l[i])) { |
| Expect.isTrue(equal(l[i], res.elementAt(count++))); |
| } |
| } |
| Expect.equals(count, res.length); |
| } |
| |
| main() { |
| var list = [i32x4(0), i32x4(1), i32x4(2), i32x4(6), i32x4(4), i32x4(5)]; |
| check([i32x4(6)], (e) => false); |
| 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); |
| } |