tests/mozilla/ecma_3/Array/regress-101488.js

   1 /*
   2 * The contents of this file are subject to the Netscape Public
   3 * License Version 1.1 (the "License"); you may not use this file
   4 * except in compliance with the License. You may obtain a copy of
   5 * the License at http://www.mozilla.org/NPL/
   6 *
   7 * Software distributed under the License is distributed on an "AS
   8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
   9 * implied. See the License for the specific language governing
  10 * rights and limitations under the License.
  11 *
  12 * The Original Code is mozilla.org code.
  13 *
  14 * The Initial Developer of the Original Code is Netscape
  15 * Communications Corporation.  Portions created by Netscape are
  16 * Copyright (C) 1998 Netscape Communications Corporation.
  17 * All Rights Reserved.
  18 *
  19 * Contributor(s): igor@icesoft.no, pschwartau@netscape.com
  20 * Date: 24 September 2001
  21 *
  22 * SUMMARY: Try assigning arr.length = new Number(n)
  23 * From correspondence with Igor Bukanov <igor@icesoft.no>
  24 * See http://bugzilla.mozilla.org/show_bug.cgi?id=101488
  25 *
  26 * Without the "new" keyword, assigning arr.length = Number(n) worked.
  27 * But with it, Rhino was giving an error "Inappropriate array length"
  28 * and SpiderMonkey was exiting without giving any error or return value -
  29 *
  30 * Comments on the Rhino code by igor@icesoft.no:
  31 *
  32 * jsSet_length requires that the new length value should be an instance
  33 * of Number. But according to Ecma 15.4.5.1, item 12-13, an error should
  34 * be thrown only if ToUint32(length_value) != ToNumber(length_value)
  35 */
  36 //-----------------------------------------------------------------------------
  37 var UBound = 0;
  38 var bug = 101488;
  39 var summary = 'Try assigning arr.length = new Number(n)';
  40 var status = '';
  41 var statusitems = [];
  42 var actual = '';
  43 var actualvalues = [];
  44 var expect= '';
  45 var expectedvalues = [];
  46 var arr = [];
  47
  48
  49 status = inSection(1);
  50 arr = Array();
  51 tryThis('arr.length = new Number(1);');
  52 actual = arr.length;
  53 expect = 1;
  54 addThis();
  55
  56 status = inSection(2);
  57 arr = Array(5);
  58 tryThis('arr.length = new Number(1);');
  59 actual = arr.length;
  60 expect = 1;
  61 addThis();
  62
  63 status = inSection(3);
  64 arr = Array();
  65 tryThis('arr.length = new Number(17);');
  66 actual = arr.length;
  67 expect = 17;
  68 addThis();
  69
  70 status = inSection(4);
  71 arr = Array(5);
  72 tryThis('arr.length = new Number(17);');
  73 actual = arr.length;
  74 expect = 17;
  75 addThis();
  76
  77
  78 /*
  79  * Also try the above with the "new" keyword before Array().
  80  * Array() and new Array() should be equivalent, by ECMA 15.4.1.1
  81  */
  82 status = inSection(5);
  83 arr = new Array();
  84 tryThis('arr.length = new Number(1);');
  85 actual = arr.length;
  86 expect = 1;
  87 addThis();
  88
  89 status = inSection(6);
  90 arr = new Array(5);
  91 tryThis('arr.length = new Number(1);');
  92 actual = arr.length;
  93 expect = 1;
  94 addThis();
  95
  96 arr = new Array();
  97 tryThis('arr.length = new Number(17);');
  98 actual = arr.length;
  99 expect = 17;
 100 addThis();
 101
 102 status = inSection(7);
 103 arr = new Array(5);
 104 tryThis('arr.length = new Number(17);');
 105 actual = arr.length;
 106 expect = 17;
 107 addThis();
 108
 109
 110
 111 //-----------------------------------------------------------------------------
 112 test();
 113 //-----------------------------------------------------------------------------
 114
 115
 116
 117 function tryThis(s)
 118 {
 119   try
 120   {
 121     eval(s);
 122   }
 123   catch(e)
 124   {
 125     // keep going
 126   }
 127 }
 128
 129
 130 function addThis()
 131 {
 132   statusitems[UBound] = status;
 133   actualvalues[UBound] = actual;
 134   expectedvalues[UBound] = expect;
 135   UBound++;
 136 }
 137
 138
 139 function test()
 140 {
 141   enterFunc ('test');
 142   printBugNumber (bug);
 143   printStatus (summary);
 144
 145   for (var i=0; i<UBound; i++)
 146   {
 147     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
 148   }
 149
 150   exitFunc ('test');
 151 }