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

/*---
info: >
    If y is -Infinity and x is finite, Math.atan2(y,x) is an
    implementation-dependent approximation to -PI/2
es5id: 15.8.2.5_A19
description: >
    Checking if Math.atan2(y,x) is an approximation to -PI/2, where y
    is -Infinity and x is finite
includes:
    - math_precision.js
    - math_isequal.js
---*/

// CHECK#1
//prec = 0.00000000000001;
var y = -Infinity;
var x = new Array();
x[0] = 0.000000000000001;
x[1] = 1;
x[2] = 1.7976931348623157E308; //largest finite number
x[3] = -0.000000000000001;
x[4] = -1;
x[5] = -1.7976931348623157E308; //largest (by module) finite number 
 
var xnum = 6;

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