| // 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 num operator -(num other) |
| /// This operator implements arithmetic subtraction operation. |
| /// @description Checks that this operator returns correct value for both integer |
| /// and double arguments (including special values). |
| /// @author vasya |
| |
| import "../../../Utils/expect.dart"; |
| import "dart:math" as Math; |
| |
| main() { |
| Expect.equals(0, 1 - 1); |
| Expect.equals(2147483646, 2147483647 - 1); |
| Expect.equals(-2147483649, -2147483648 - 1); |
| Expect.equals(4294967294, 4294967295 - 1); |
| Expect.equals(-4294967297, -4294967296 - 1); |
| Expect.equals(9007199254740990, 9007199254740991 - 1); |
| Expect.equals(-9007199254740991, -9007199254740990 - 1); |
| Expect.equals(1, 9007199254740991 - 9007199254740990); |
| |
| final double MIN_DOUBLE = Math.pow(2.0, -1074) as double; |
| final double NEG_MIN_DOUBLE = -1 * MIN_DOUBLE; |
| final double MAX_DOUBLE = |
| (2 - Math.pow(2.0, -52)) * Math.pow(2.0, 1023) as double; |
| final double NEG_MAX_DOUBLE = -1 * MAX_DOUBLE; |
| |
| Expect.equals(0.0, 0 - 0.0); |
| Expect.equals(0.0, 0 - -0.0); |
| Expect.equals(0.0, 1 - 1.0); |
| Expect.equals(0.0, -1 - -1.0); |
| |
| Expect.equals(double.negativeInfinity, 0 - double.infinity); |
| Expect.equals(double.infinity, 0 - double.negativeInfinity); |
| Expect.equals(NEG_MIN_DOUBLE, 0 - MIN_DOUBLE); |
| Expect.equals(NEG_MAX_DOUBLE, 0 - MAX_DOUBLE); |
| |
| Expect.isTrue((0 - double.nan).isNaN); |
| } |