test/suite/ch15/15.8/15.8.2/15.8.2.5/S15.8.2.5_A12.js


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// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/**
 * If y<0 and x is +0, Math.atan2(y,x) is an implementation-dependent approximation to -PI/2
 *
 * @path ch15/15.8/15.8.2/15.8.2.5/S15.8.2.5_A12.js
 * @description Checking if Math.atan2(y,+0) is an approximation to -PI/2, where y<0
 */

$INCLUDE("math_precision.js");
$INCLUDE("math_isequal.js"); 
 
// CHECK#1
x = +0;
//prec = 0.00000000000001;
y = new Array();
y[0] = -0.000000000000001;
y[2] = -Infinity;
y[1] = -1; 
ynum = 3;

for (i = 0; i < ynum; i++)
{
	if (!isEqual(Math.atan2(y[i],x), -(Math.PI)/2))
		$FAIL("#1: Math.abs(Math.atan2(" + y[i] + ", " + x + ") + ((Math.PI)/2)) >= " + prec);
}