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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 // Tests the special cases specified by ES 15.8.2.17 | 28 // Tests the special cases specified by ES 15.8.2.17 |
29 | 29 |
30 function test(expected_sqrt, value) { | 30 function test(expected_sqrt, value) { |
31 assertEquals(expected_sqrt, Math.sqrt(value)); | 31 assertEquals(expected_sqrt, Math.sqrt(value)); |
32 if (isFinite(value)) { | 32 if (isFinite(value)) { |
33 if ((1 / value) == -Infinity) { | 33 if (value === 0 && (1 / value) == -Infinity) { |
34 // Math.pow(-0, 0.5) must be zero, but Math.sqrt(-0) is -0. | 34 // Math.pow(-0, 0.5) must be zero, but Math.sqrt(-0) is -0. |
35 expected_sqrt = 0; | 35 expected_sqrt = 0; |
36 } | 36 } |
37 assertEquals(expected_sqrt, Math.pow(value, 0.5)); | 37 assertEquals(expected_sqrt, Math.pow(value, 0.5)); |
38 } | 38 } |
39 } | 39 } |
40 | 40 |
41 // Simple sanity check | 41 // Simple sanity check |
42 test(2, 4); | 42 test(2, 4); |
43 test(0.1, 0.01); | 43 test(0.1, 0.01); |
44 | 44 |
45 // Spec tests | 45 // Spec tests |
46 test(NaN, NaN); | 46 test(NaN, NaN); |
47 test(NaN, -1); | 47 test(NaN, -1); |
48 test(+0, +0); | 48 test(+0, +0); |
49 test(-0, -0); | 49 test(-0, -0); |
50 test(Infinity, Infinity); | 50 test(Infinity, Infinity); |
51 // -Infinity is smaller than 0 so it should return NaN | 51 // -Infinity is smaller than 0 so it should return NaN |
52 test(NaN, -Infinity); | 52 test(NaN, -Infinity); |
53 | 53 |
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