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/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
File Name: 15.8.2.4.js
ECMA Section: 15.8.2.4 atan( x )
Description: return an approximation to the arc tangent of the
argument. the result is expressed in radians and
range is from -PI/2 to +PI/2. special cases:
- if x is NaN, the result is NaN
- if x == +0, the result is +0
- if x == -0, the result is -0
- if x == +Infinity, the result is approximately +PI/2
- if x == -Infinity, the result is approximately -PI/2
Author: christine@netscape.com
Date: 7 july 1997
*/
var SECTION = "15.8.2.4";
var VERSION = "ECMA_1";
var TITLE = "Math.atan()";
var BUGNUMBER="77391";
startTest();
writeHeaderToLog( SECTION + " "+ TITLE);
new TestCase( SECTION,
"Math.atan.length",
1,
Math.atan.length );
new TestCase( SECTION,
"Math.atan()",
Number.NaN,
Math.atan() );
new TestCase( SECTION,
"Math.atan(void 0)",
Number.NaN,
Math.atan(void 0) );
new TestCase( SECTION,
"Math.atan(null)",
0,
Math.atan(null) );
new TestCase( SECTION,
"Math.atan(NaN)",
Number.NaN,
Math.atan(Number.NaN) );
new TestCase( SECTION,
"Math.atan('a string')",
Number.NaN,
Math.atan("a string") );
new TestCase( SECTION,
"Math.atan('0')",
0,
Math.atan('0') );
new TestCase( SECTION,
"Math.atan('1')",
Math.PI/4,
Math.atan('1') );
new TestCase( SECTION,
"Math.atan('-1')",
-Math.PI/4,
Math.atan('-1') );
new TestCase( SECTION,
"Math.atan('Infinity)",
Math.PI/2,
Math.atan('Infinity') );
new TestCase( SECTION,
"Math.atan('-Infinity)",
-Math.PI/2,
Math.atan('-Infinity') );
new TestCase( SECTION,
"Math.atan(0)",
0,
Math.atan(0) );
new TestCase( SECTION,
"Math.atan(-0)",
-0,
Math.atan(-0) );
new TestCase( SECTION,
"Infinity/Math.atan(-0)",
-Infinity,
Infinity/Math.atan(-0) );
new TestCase( SECTION,
"Math.atan(Infinity)",
Math.PI/2,
Math.atan(Number.POSITIVE_INFINITY) );
new TestCase( SECTION,
"Math.atan(-Infinity)",
-Math.PI/2,
Math.atan(Number.NEGATIVE_INFINITY) );
new TestCase( SECTION,
"Math.atan(1)",
Math.PI/4,
Math.atan(1) );
new TestCase( SECTION,
"Math.atan(-1)",
-Math.PI/4,
Math.atan(-1) );
test();
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