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: 15.8.2.15.js 24 ECMA Section: 15.8.2.15 Math.round(x) 25 Description: return the greatest number value that is closest to the 26 argument and is an integer. if two integers are equally 27 close to the argument. then the result is the number value 28 that is closer to Infinity. if the argument is an integer, 29 return the argument. 30 special cases: 31 - if x is NaN return NaN 32 - if x = +0 return +0 33 - if x = -0 return -0 34 - if x = Infinity return Infinity 35 - if x = -Infinity return -Infinity 36 - if 0 < x < 0.5 return 0 37 - if -0.5 <= x < 0 return -0 38 example: 39 Math.round( 3.5 ) == 4 40 Math.round( -3.5 ) == 3 41 also: 42 - Math.round(x) == Math.floor( x + 0.5 ) 43 except if x = -0. in that case, Math.round(x) = -0 44 45 and Math.floor( x+0.5 ) = +0 46 47 48 Author: christine@netscape.com 49 Date: 7 july 1997 50*/ 51 52 var SECTION = "15.8.2.15"; 53 var VERSION = "ECMA_1"; 54 startTest(); 55 var TITLE = "Math.round(x)"; 56 var BUGNUMBER="331411"; 57 58 var EXCLUDE = "true"; 59 60 writeHeaderToLog( SECTION + " "+ TITLE); 61 62 var testcases = getTestCases(); 63 test(); 64 65function getTestCases() { 66 var array = new Array(); 67 var item = 0; 68 69 array[item++] = new TestCase( SECTION, "Math.round.length", 1, Math.round.length ); 70 71 array[item++] = new TestCase( SECTION, "Math.round()", Number.NaN, Math.round() ); 72 array[item++] = new TestCase( SECTION, "Math.round(null)", 0, Math.round(0) ); 73 array[item++] = new TestCase( SECTION, "Math.round(void 0)", Number.NaN, Math.round(void 0) ); 74 array[item++] = new TestCase( SECTION, "Math.round(true)", 1, Math.round(true) ); 75 array[item++] = new TestCase( SECTION, "Math.round(false)", 0, Math.round(false) ); 76 array[item++] = new TestCase( SECTION, "Math.round('.99999')", 1, Math.round('.99999') ); 77 array[item++] = new TestCase( SECTION, "Math.round('12345e-2')", 123, Math.round('12345e-2') ); 78 79 array[item++] = new TestCase( SECTION, "Math.round(NaN)", Number.NaN, Math.round(Number.NaN) ); 80 array[item++] = new TestCase( SECTION, "Math.round(0)", 0, Math.round(0) ); 81 array[item++] = new TestCase( SECTION, "Math.round(-0)", -0, Math.round(-0)); 82 array[item++] = new TestCase( SECTION, "Infinity/Math.round(-0)", -Infinity, Infinity/Math.round(-0) ); 83 84 array[item++] = new TestCase( SECTION, "Math.round(Infinity)", Number.POSITIVE_INFINITY, Math.round(Number.POSITIVE_INFINITY)); 85 array[item++] = new TestCase( SECTION, "Math.round(-Infinity)",Number.NEGATIVE_INFINITY, Math.round(Number.NEGATIVE_INFINITY)); 86 array[item++] = new TestCase( SECTION, "Math.round(0.49)", 0, Math.round(0.49)); 87 array[item++] = new TestCase( SECTION, "Math.round(0.5)", 1, Math.round(0.5)); 88 array[item++] = new TestCase( SECTION, "Math.round(0.51)", 1, Math.round(0.51)); 89 90 array[item++] = new TestCase( SECTION, "Math.round(-0.49)", -0, Math.round(-0.49)); 91 array[item++] = new TestCase( SECTION, "Math.round(-0.5)", -0, Math.round(-0.5)); 92 array[item++] = new TestCase( SECTION, "Infinity/Math.round(-0.49)", -Infinity, Infinity/Math.round(-0.49)); 93 array[item++] = new TestCase( SECTION, "Infinity/Math.round(-0.5)", -Infinity, Infinity/Math.round(-0.5)); 94 95 array[item++] = new TestCase( SECTION, "Math.round(-0.51)", -1, Math.round(-0.51)); 96 array[item++] = new TestCase( SECTION, "Math.round(3.5)", 4, Math.round(3.5)); 97 array[item++] = new TestCase( SECTION, "Math.round(-3.5)", -3, Math.round(-3)); 98 99 return ( array ); 100} 101function test() { 102 for ( tc=0; tc < testcases.length; tc++ ) { 103 testcases[tc].passed = writeTestCaseResult( 104 testcases[tc].expect, 105 testcases[tc].actual, 106 testcases[tc].description +" = "+ 107 testcases[tc].actual ); 108 109 testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value "; 110 } 111 stopTest(); 112 return ( testcases ); 113}