test262/test/built-ins/Math/atan2/S15.8.2.5_A12.js

32 lines
735 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<0 and x is +0, Math.atan2(y,x) is an implementation-dependent
approximation to -PI/2
es5id: 15.8.2.5_A12
description: >
Checking if Math.atan2(y,+0) is an approximation to -PI/2, where
y<0
includes:
- $FAIL.js
- math_precision.js
- 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);
}