| /* |
| * Copyright (c) 2011, 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 double log(num x) |
| * Returns NaN if [x] is NaN or less than zero. |
| * @description Checks that [log] returns NaN if [x] is NaN or less than zero. |
| * @author msyabro |
| */ |
| import "dart:math" as Math; |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| Expect.isTrue(Math.log(-1).isNaN); |
| Expect.isTrue(Math.log(-0.5).isNaN); |
| Expect.isTrue(Math.log(double.nan).isNaN); |
| Expect.isTrue(Math.log(double.negativeInfinity).isNaN); |
| } |