mirror of https://github.com/tc39/test262.git
47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
// Copyright 2009 the Sputnik authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/**
|
|
* Sine is a periodic function with period 2*PI
|
|
*
|
|
* @path 15_Native/15.8_The_Math_Object/15.8.2_Function_Properties_of_the_Math_Object/15.8.2.16_sin/S15.8.2.16_A6.js
|
|
* @description Checking if Math.sin(x) equals to Math.sin(x+n*2*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 2*Math.PI
|
|
*/
|
|
|
|
// CHECK#1
|
|
prec = 0.000000000003;
|
|
//prec = 0.000000000000001;
|
|
period = 2*Math.PI;
|
|
pernum = 100;
|
|
|
|
a = -pernum * period;
|
|
b = pernum * period;
|
|
snum = 9;
|
|
step = period/snum + 0.0;
|
|
x = new Array();
|
|
for (i = 0; i < snum; i++)
|
|
{
|
|
x[i] = a + i*step;
|
|
}
|
|
x[9] = a + period;
|
|
|
|
var curval;
|
|
var curx;
|
|
var j;
|
|
for (i = 0; i < snum; i++)
|
|
{
|
|
curval = Math.sin(x[i]);
|
|
curx = x[i] + period;
|
|
j = 0;
|
|
while (curx <= b)
|
|
{
|
|
curx += period;
|
|
j++;
|
|
if (Math.abs(Math.sin(curx) - curval) >= prec)
|
|
{
|
|
$FAIL("#1: sin is found out to not be periodic:\n Math.abs(Math.sin(" + x[i] + ") - Math.sin(" + x[i] + " + 2*Math.PI*" + j + ")) >= " + prec + "\n Math.sin(" + x[i] + ") === " + curval + "\n Math.sin(" + curx + ") === " + Math.sin(curx));
|
|
}
|
|
}
|
|
}
|
|
|