| /* |
| * 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 pow(num x, num exponent) |
| * For doubles, pow(x, y) handles edge cases as follows: |
| * ... |
| * - if [x] is -Infinity or -0.0 and [y] is an odd integer, then the result |
| * is -pow(-[x] ,[y]). |
| * @description Checks the result when [x] is -Infinity or -0.0 and [y] is an |
| * odd integer. |
| * @author pagolubev |
| * @reviewer msyabro |
| */ |
| |
| import "dart:math" as Math; |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| Expect.equals( |
| double.negativeInfinity, Math.pow(double.negativeInfinity, 1)); |
| Expect.equals( |
| double.negativeInfinity, Math.pow(double.negativeInfinity, 1.0)); |
| Expect.equals( |
| double.negativeInfinity, Math.pow(double.negativeInfinity, 11)); |
| Expect.equals( |
| double.negativeInfinity, Math.pow(double.negativeInfinity, 11.0)); |
| |
| Expect.equals(.0, Math.pow(double.negativeInfinity, -1)); |
| Expect.isTrue(Math.pow(double.negativeInfinity, -1).isNegative); |
| Expect.equals(.0, Math.pow(double.negativeInfinity, -1.0)); |
| Expect.isTrue(Math.pow(double.negativeInfinity, -1.0).isNegative); |
| Expect.equals(.0, Math.pow(double.negativeInfinity, -11)); |
| Expect.isTrue(Math.pow(double.negativeInfinity, -11).isNegative); |
| Expect.equals(.0, Math.pow(double.negativeInfinity, -11.0)); |
| Expect.isTrue(Math.pow(double.negativeInfinity, -11.0).isNegative); |
| |
| Expect.equals(.0, Math.pow(-.0, 1)); |
| Expect.isTrue(Math.pow(-.0, 1).isNegative); |
| Expect.equals(.0, Math.pow(-.0, 1.0)); |
| Expect.isTrue(Math.pow(-.0, 1.0).isNegative); |
| Expect.equals(.0, Math.pow(-.0, 11)); |
| Expect.isTrue(Math.pow(-.0, 11).isNegative); |
| Expect.equals(.0, Math.pow(-.0, 11.0)); |
| Expect.isTrue(Math.pow(-.0, 11.0).isNegative); |
| |
| Expect.equals(double.negativeInfinity, Math.pow(-.0, -1)); |
| Expect.equals(double.negativeInfinity, Math.pow(-.0, -1.0)); |
| Expect.equals(double.negativeInfinity, Math.pow(-.0, -11)); |
| Expect.equals(double.negativeInfinity, Math.pow(-.0, -11.0)); |
| } |