tests/mozilla/ecma/Math/15.8.2.15.js

   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
  65 function 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 }
 101 function 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 }