1// Copyright 2010 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Tests the special cases specified by ES 15.8.2.17
29
30function test(expected_sqrt, value) {
31  assertEquals(expected_sqrt, Math.sqrt(value));
32  if (isFinite(value)) {
33    if (value === 0 && (1 / value) == -Infinity) {
34      // Math.pow(-0, 0.5) must be zero, but Math.sqrt(-0) is -0.
35      expected_sqrt = 0;
36    }
37    assertEquals(expected_sqrt, Math.pow(value, 0.5));
38  }
39}
40
41// Simple sanity check
42test(2, 4);
43test(0.1, 0.01);
44
45// Spec tests
46test(NaN, NaN);
47test(NaN, -1);
48test(+0, +0);
49test(-0, -0);
50test(Infinity, Infinity);
51// -Infinity is smaller than 0 so it should return NaN
52test(NaN, -Infinity);
53