| // 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 operator -(num other) |
| * @description Checks that if both operands are positive infinity or both |
| * operands are negative infinity the result is NaN. |
| * @author pagolubev |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| checkNaN(d) { |
| var msg = 'Expected: NaN, actual: $d'; |
| Expect.isTrue(d.isNaN, msg); |
| } |
| |
| main() { |
| checkNaN(double.infinity - double.infinity); |
| checkNaN(double.negativeInfinity - double.negativeInfinity); |
| } |
