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      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:          15.4.2.2-1.js
     24     ECMA Section:       15.4.2.2 new Array(len)
     25 
     26     Description:        This description only applies of the constructor is
     27                         given two or more arguments.
     28 
     29                         The [[Prototype]] property of the newly constructed
     30                         object is set to the original Array prototype object,
     31                         the one that is the initial value of Array.prototype(0)
     32                         (15.4.3.1).
     33 
     34                         The [[Class]] property of the newly constructed object
     35                         is set to "Array".
     36 
     37                         If the argument len is a number, then the length
     38                         property  of the newly constructed object is set to
     39                         ToUint32(len).
     40 
     41                         If the argument len is not a number, then the length
     42                         property of the newly constructed object is set to 1
     43                         and the 0 property of the newly constructed object is
     44                         set to len.
     45 
     46                         This file tests cases where len is a number.
     47 
     48                         The cases in this test need to be updated since the
     49                         ToUint32 description has changed.
     50 
     51     Author:             christine (at) netscape.com
     52     Date:               7 october 1997
     53 */
     54     var SECTION = "15.4.2.2-1";
     55     var VERSION = "ECMA_1";
     56     startTest();
     57     var TITLE   = "The Array Constructor:  new Array( len )";
     58 
     59     writeHeaderToLog( SECTION + " "+ TITLE);
     60 
     61     var testcases = getTestCases();
     62     test();
     63 
     64 function getTestCases() {
     65     var array = new Array();
     66     var item = 0;
     67 
     68     array[item++] = new TestCase( SECTION,	"new Array(0)",             "",                 (new Array(0)).toString() );
     69     array[item++] = new TestCase( SECTION,	"typeof new Array(0)",      "object",           (typeof new Array(0)) );
     70     array[item++] = new TestCase( SECTION,	"(new Array(0)).length",    0,                  (new Array(0)).length );
     71     array[item++] = new TestCase( SECTION,	"(new Array(0)).toString", Array.prototype.toString,    (new Array(0)).toString );
     72 
     73     array[item++] = new TestCase( SECTION,   "new Array(1)",            "",                 (new Array(1)).toString() );
     74     array[item++] = new TestCase( SECTION,   "new Array(1).length",     1,                  (new Array(1)).length );
     75     array[item++] = new TestCase( SECTION,   "(new Array(1)).toString", Array.prototype.toString,   (new Array(1)).toString );
     76 
     77     array[item++] = new TestCase( SECTION,	"(new Array(-0)).length",                       0,  (new Array(-0)).length );
     78     array[item++] = new TestCase( SECTION,	"(new Array(0)).length",                        0,  (new Array(0)).length );
     79 
     80     array[item++] = new TestCase( SECTION,	"(new Array(10)).length",           10,         (new Array(10)).length );
     81     array[item++] = new TestCase( SECTION,	"(new Array('1')).length",          1,          (new Array('1')).length );
     82     array[item++] = new TestCase( SECTION,	"(new Array(1000)).length",         1000,       (new Array(1000)).length );
     83     array[item++] = new TestCase( SECTION,	"(new Array('1000')).length",       1,          (new Array('1000')).length );
     84 
     85     array[item++] = new TestCase( SECTION,	"(new Array(4294967295)).length",   ToUint32(4294967295),   (new Array(4294967295)).length );
     86 
     87     array[item++] = new TestCase( SECTION,	"(new Array('8589934592')).length", 1,                      (new Array("8589934592")).length );
     88     array[item++] = new TestCase( SECTION,	"(new Array('4294967296')).length", 1,                      (new Array("4294967296")).length );
     89     array[item++] = new TestCase( SECTION,	"(new Array(1073741824)).length",   ToUint32(1073741824),	(new Array(1073741824)).length );
     90 
     91     return ( array );
     92 }
     93 function test() {
     94     for ( tc=0; tc < testcases.length; tc++ ) {
     95         testcases[tc].passed = writeTestCaseResult(
     96                             testcases[tc].expect,
     97                             testcases[tc].actual,
     98                             testcases[tc].description +" = "+
     99                             testcases[tc].actual );
    100 
    101         testcases[tc].reason += ( testcases[tc].passed )
    102                              ? ""
    103                              : "wrong value ";
    104     }
    105     stopTest();
    106     return ( testcases );
    107 }
    108 function ToUint32( n ) {
    109     n = Number( n );
    110     var sign = ( n < 0 ) ? -1 : 1;
    111 
    112     if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY) {
    113         return 0;
    114     }
    115     n = sign * Math.floor( Math.abs(n) )
    116 
    117     n = n % Math.pow(2,32);
    118 
    119     if ( n < 0 ){
    120         n += Math.pow(2,32);
    121     }
    122 
    123     return ( n );
    124 }