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/* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code, released March
* 31, 1998.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
*/
/**
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";
startTest();
var TITLE = "Math.atan()";
var BUGNUMBER="77391";
writeHeaderToLog( SECTION + " "+ TITLE);
var testcases = getTestCases();
test();
function getTestCases() {
var array = new Array();
var item = 0;
array[item++] = new TestCase( SECTION, "Math.atan.length", 1, Math.atan.length );
array[item++] = new TestCase( SECTION, "Math.atan()", Number.NaN, Math.atan() );
array[item++] = new TestCase( SECTION, "Math.atan(void 0)", Number.NaN, Math.atan(void 0) );
array[item++] = new TestCase( SECTION, "Math.atan(null)", 0, Math.atan(null) );
array[item++] = new TestCase( SECTION, "Math.atan(NaN)", Number.NaN, Math.atan(Number.NaN) );
array[item++] = new TestCase( SECTION, "Math.atan('a string')", Number.NaN, Math.atan("a string") );
array[item++] = new TestCase( SECTION, "Math.atan('0')", 0, Math.atan('0') );
array[item++] = new TestCase( SECTION, "Math.atan('1')", Math.PI/4, Math.atan('1') );
array[item++] = new TestCase( SECTION, "Math.atan('-1')", -Math.PI/4, Math.atan('-1') );
array[item++] = new TestCase( SECTION, "Math.atan('Infinity)", Math.PI/2, Math.atan('Infinity') );
array[item++] = new TestCase( SECTION, "Math.atan('-Infinity)", -Math.PI/2, Math.atan('-Infinity') );
array[item++] = new TestCase( SECTION, "Math.atan(0)", 0, Math.atan(0) );
array[item++] = new TestCase( SECTION, "Math.atan(-0)", -0, Math.atan(-0) );
array[item++] = new TestCase( SECTION, "Infinity/Math.atan(-0)", -Infinity, Infinity/Math.atan(-0) );
array[item++] = new TestCase( SECTION, "Math.atan(Infinity)", Math.PI/2, Math.atan(Number.POSITIVE_INFINITY) );
array[item++] = new TestCase( SECTION, "Math.atan(-Infinity)", -Math.PI/2, Math.atan(Number.NEGATIVE_INFINITY) );
array[item++] = new TestCase( SECTION, "Math.atan(1)", Math.PI/4, Math.atan(1) );
array[item++] = new TestCase( SECTION, "Math.atan(-1)", -Math.PI/4, Math.atan(-1) );
return array;
}
function test() {
for ( tc=0; tc < testcases.length; tc++ ) {
testcases[tc].passed = writeTestCaseResult(
testcases[tc].expect,
testcases[tc].actual,
testcases[tc].description +" = "+
testcases[tc].actual );
testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
}
stopTest();
return ( testcases );
}
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