| /* |
| * 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 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] contains all elements |
| * from [this] that satisfy [test], and all other elements are skipped. |
| * @author msyabro |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(List<double> list, bool test (double element)) { |
| var l = new Float64List.fromList(list); |
| var res = l.where(test); |
| |
| var count = 0; |
| |
| for (int i = 0 ; i < list.length; ++i) { |
| if (test(l[i])) { |
| Expect.equals(l[i], res.elementAt(count)); |
| ++count; |
| } |
| } |
| Expect.equals(count, res.length); |
| } |
| |
| main() { |
| check([], (e) => true); |
| check([1.0], (e) => false); |
| check([1.0, 1.0, 1.0, 2.0, 1.0, 1.0], (e) => e == 1.0 ); |
| check([0.0, 1.0, 2.0, 3.0, 4.0, 5.0], (e) => e < 5.0 ); |
| check([0.0, 1.0, 2.0, 3.0, 4.0, 5.0], (e) => e > 0.0 ); |
| check([0.0, 1.0, 2.0, 3.0, 4.0, 5.0], (e) => e != 2.0 ); |
| } |