test262/test/built-ins/Math/atan2/S15.8.2.5_A19.js

36 lines
924 B
JavaScript

// 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:
- $FAIL.js
- math_precision.js
- math_isequal.js
---*/
// CHECK#1
//prec = 0.00000000000001;
y = -Infinity;
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
xnum = 6;
for (i = 0; i < xnum; i++)
{
if (!isEqual(Math.atan2(y,x[i]), -(Math.PI)/2))
$FAIL("#1: Math.abs(Math.atan2(" + y + ", " + x[i] + ") + (Math.PI/2)) >= " + prec);
}