| // Copyright (c) 2016, 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 Duration operator unary-() |
| * Returns a new Duration representing this Duration negated. |
| * The returned Duration has the same length as this one, but will have the |
| * opposite sign of this one. |
| * @description Checks that this operator returns a new Duration representing |
| * this Duration negated. |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| Duration d1 = new Duration(days: 1, microseconds: 1); |
| Duration d2 = -d1; |
| |
| Expect.isTrue(d2.isNegative); |
| Expect.equals(d1.inMicroseconds, d2.inMicroseconds.abs()); |
| |
| Duration d3 = new Duration(days: -1, microseconds: 1); |
| Duration d4 = -d3; |
| |
| Expect.isFalse(d4.isNegative); |
| Expect.equals(d3.inMicroseconds.abs(), d4.inMicroseconds); |
| } |