1 /* The contents of this file are subject to the Netscape Public 2 * License Version 1.1 (the "License"); you may not use this file 3 * except in compliance with the License. You may obtain a copy of 4 * the License at http://www.mozilla.org/NPL/ 5 * 6 * Software distributed under the License is distributed on an "AS 7 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 8 * implied. See the License for the specific language governing 9 * rights and limitations under the License. 10 * 11 * The Original Code is Mozilla Communicator client code, released March 12 * 31, 1998. 13 * 14 * The Initial Developer of the Original Code is Netscape Communications 15 * Corporation. Portions created by Netscape are 16 * Copyright (C) 1998 Netscape Communications Corporation. All 17 * Rights Reserved. 18 * 19 * Contributor(s): 20 * 21 */ 22 /** 23 File Name: 15.8.2.4.js 24 ECMA Section: 15.8.2.4 atan( x ) 25 Description: return an approximation to the arc tangent of the 26 argument. the result is expressed in radians and 27 range is from -PI/2 to +PI/2. special cases: 28 - if x is NaN, the result is NaN 29 - if x == +0, the result is +0 30 - if x == -0, the result is -0 31 - if x == +Infinity, the result is approximately +PI/2 32 - if x == -Infinity, the result is approximately -PI/2 33 Author: christine (at) netscape.com 34 Date: 7 july 1997 35 36 */ 37 38 var SECTION = "15.8.2.4"; 39 var VERSION = "ECMA_1"; 40 startTest(); 41 var TITLE = "Math.atan()"; 42 var BUGNUMBER="77391"; 43 44 writeHeaderToLog( SECTION + " "+ TITLE); 45 46 var testcases = getTestCases(); 47 test(); 48 49 function getTestCases() { 50 var array = new Array(); 51 var item = 0; 52 53 array[item++] = new TestCase( SECTION, "Math.atan.length", 1, Math.atan.length ); 54 55 array[item++] = new TestCase( SECTION, "Math.atan()", Number.NaN, Math.atan() ); 56 array[item++] = new TestCase( SECTION, "Math.atan(void 0)", Number.NaN, Math.atan(void 0) ); 57 array[item++] = new TestCase( SECTION, "Math.atan(null)", 0, Math.atan(null) ); 58 array[item++] = new TestCase( SECTION, "Math.atan(NaN)", Number.NaN, Math.atan(Number.NaN) ); 59 60 array[item++] = new TestCase( SECTION, "Math.atan('a string')", Number.NaN, Math.atan("a string") ); 61 array[item++] = new TestCase( SECTION, "Math.atan('0')", 0, Math.atan('0') ); 62 array[item++] = new TestCase( SECTION, "Math.atan('1')", Math.PI/4, Math.atan('1') ); 63 array[item++] = new TestCase( SECTION, "Math.atan('-1')", -Math.PI/4, Math.atan('-1') ); 64 array[item++] = new TestCase( SECTION, "Math.atan('Infinity)", Math.PI/2, Math.atan('Infinity') ); 65 array[item++] = new TestCase( SECTION, "Math.atan('-Infinity)", -Math.PI/2, Math.atan('-Infinity') ); 66 67 array[item++] = new TestCase( SECTION, "Math.atan(0)", 0, Math.atan(0) ); 68 array[item++] = new TestCase( SECTION, "Math.atan(-0)", -0, Math.atan(-0) ); 69 array[item++] = new TestCase( SECTION, "Infinity/Math.atan(-0)", -Infinity, Infinity/Math.atan(-0) ); 70 array[item++] = new TestCase( SECTION, "Math.atan(Infinity)", Math.PI/2, Math.atan(Number.POSITIVE_INFINITY) ); 71 array[item++] = new TestCase( SECTION, "Math.atan(-Infinity)", -Math.PI/2, Math.atan(Number.NEGATIVE_INFINITY) ); 72 array[item++] = new TestCase( SECTION, "Math.atan(1)", Math.PI/4, Math.atan(1) ); 73 array[item++] = new TestCase( SECTION, "Math.atan(-1)", -Math.PI/4, Math.atan(-1) ); 74 return array; 75 } 76 function test() { 77 for ( tc=0; tc < testcases.length; tc++ ) { 78 testcases[tc].passed = writeTestCaseResult( 79 testcases[tc].expect, 80 testcases[tc].actual, 81 testcases[tc].description +" = "+ 82 testcases[tc].actual ); 83 84 testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value "; 85 } 86 stopTest(); 87 return ( testcases ); 88 }
