blob: c22fe7b3a37600a37eaeb3d6a4e677927051cfe7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/**
* @name: S15.8.2.18_A6;
* @section: 15.8.2.18;
* @assertion: Tangent is a periodic function with period PI;
* @description: Checking if Math.tan(x) equals to Math.tan(x+n*Math.PI) with precision 0.000000000003, where n is an integer from 1 to 100 and x is one of 10 float point values from 0 to Math.PI;
*/
// Converted for Test262 from original Sputnik source
ES5Harness.registerTest( {
id: "S15.8.2.18_A6",
path: "TestCases/15_Native/15.8_The_Math_Object/15.8.2_Function_Properties_of_the_Math_Object/15.8.2.18_tan/S15.8.2.18_A6.js",
assertion: "Tangent is a periodic function with period PI",
description: "Checking if Math.tan(x) equals to Math.tan(x+n*Math.PI) with precision 0.000000000003, where n is an integer from 1 to 100 and x is one of 10 float point values from 0 to Math.PI",
test: function testcase() {
// CHECK#1
prec = 0.00000000003;
//prec = 0.000000000000001;
period = Math.PI;
pernum = 100;
a = -pernum * period + period/2;
b = pernum * period - period/2;
snum = 9;
step = period/(snum + 2);
x = new Array();
for (i = 0; i <= snum; i++) //// We exlude special points
{ //// in this cycle.
x[i] = a + (i+1)*step; ////
} ////
var curval;
var curx;
var j;
for (i = 0; i < snum; i++)
{
curval = Math.tan(x[i]);
curx = x[i] + period;
j = 0;
while (curx <= b)
{
curx += period;
j++;
if (Math.abs(Math.tan(curx) - curval) >= prec)
{
$FAIL("#1: tan is found out to not be periodic:\n Math.abs(Math.tan(" + x[i] + ") - Math.tan(" + x[i] + " + 2*Math.PI*" + j + ")) >= " + prec + "\n Math.tan(" + x[i] + ") === " + curval + "\n Math.tan(" + curx + ") === " + Math.tan(curx));
}
}
}
}
});
|
