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      1 /* ***** BEGIN LICENSE BLOCK *****
      2 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
      3 *
      4 * The contents of this file are subject to the Netscape Public License
      5 * Version 1.1 (the "License"); you may not use this file except in
      6 * compliance with the License. You may obtain a copy of the License at
      7 * http://www.mozilla.org/NPL/
      8 *
      9 * Software distributed under the License is distributed on an "AS IS" basis,
     10 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
     11 * for the specific language governing rights and limitations under the
     12 * License.
     13 *
     14 * The Original Code is JavaScript Engine testing utilities.
     15 *
     16 * The Initial Developer of the Original Code is Netscape Communications Corp.
     17 * Portions created by the Initial Developer are Copyright (C) 2002
     18 * the Initial Developer. All Rights Reserved.
     19 *
     20 * Contributor(s): pschwartau (at) netscape.com
     21 *
     22 * Alternatively, the contents of this file may be used under the terms of
     23 * either the GNU General Public License Version 2 or later (the "GPL"), or
     24 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
     25 * in which case the provisions of the GPL or the LGPL are applicable instead
     26 * of those above. If you wish to allow use of your version of this file only
     27 * under the terms of either the GPL or the LGPL, and not to allow others to
     28 * use your version of this file under the terms of the NPL, indicate your
     29 * decision by deleting the provisions above and replace them with the notice
     30 * and other provisions required by the GPL or the LGPL. If you do not delete
     31 * the provisions above, a recipient may use your version of this file under
     32 * the terms of any one of the NPL, the GPL or the LGPL.
     33 *
     34 * ***** END LICENSE BLOCK *****
     35 *
     36 *
     37 * Date:    20 Feb 2002
     38 * SUMMARY: Testing the comparison |undefined === null|
     39 * See http://bugzilla.mozilla.org/show_bug.cgi?id=126722
     40 *
     41 */
     42 //-----------------------------------------------------------------------------
     43 var UBound = 0;
     44 var bug = 126722;
     45 var summary = 'Testing the comparison |undefined === null|';
     46 var status = '';
     47 var statusitems = [];
     48 var actual = '';
     49 var actualvalues = [];
     50 var expect= '';
     51 var expectedvalues = [];
     52 
     53 
     54 status = inSection(1);
     55 if (undefined === null)
     56   actual = true;
     57 else
     58   actual = false;
     59 expect = false;
     60 addThis();
     61 
     62 
     63 
     64 status = inSection(2);
     65 switch(true)
     66 {
     67   case (undefined === null) :
     68     actual = true;
     69     break;
     70 
     71   default:
     72     actual = false;
     73 }
     74 expect = false;
     75 addThis();
     76 
     77 
     78 
     79 status = inSection(3);
     80 function f3(x)
     81 {
     82   var res = false;
     83 
     84   switch(true)
     85   {
     86     case (x === null) :
     87       res = true;
     88       break;
     89 
     90     default:
     91       // do nothing
     92   }
     93 
     94   return res;
     95 }
     96 
     97 actual = f3(undefined);
     98 expect = false;
     99 addThis();
    100 
    101 
    102 
    103 status = inSection(4);
    104 function f4(arr)
    105 {
    106   var elt = '';
    107   var res = false;
    108 
    109   for (i=0; i<arr.length; i++)
    110   {
    111     elt = arr[i];
    112 
    113     switch(true)
    114     {
    115       case (elt === null) :
    116         res = true;
    117         break;
    118 
    119       default:
    120         // do nothing
    121     }
    122   }
    123 
    124   return res;
    125 }
    126 
    127 var arr = Array('a', undefined);
    128 actual = f4(arr);
    129 expect = false;
    130 addThis();
    131 
    132 
    133 
    134 status = inSection(5);
    135 function f5(arr)
    136 {
    137   var len = arr.length;
    138 
    139   for(var i=0; (arr[i]===undefined) && (i<len); i++)
    140     ; //do nothing
    141 
    142   return i;
    143 }
    144 
    145 /*
    146  * An array of 5 undefined elements. Note:
    147  *
    148  * The return value of eval(a STATEMENT) is undefined.
    149  * A non-existent PROPERTY is undefined, not a ReferenceError.
    150  * No undefined element exists AFTER trailing comma at end.
    151  *
    152  */
    153 var arrUndef = [ , undefined, eval('var x = 0'), this.NOT_A_PROPERTY, , ];
    154 actual = f5(arrUndef);
    155 expect = 5;
    156 addThis();
    157 
    158 
    159 
    160 status = inSection(6);
    161 function f6(arr)
    162 {
    163   var len = arr.length;
    164 
    165   for(var i=0; (arr[i]===null) && (i<len); i++)
    166     ; //do nothing
    167 
    168   return i;
    169 }
    170 
    171 /*
    172  * Use same array as above. This time we're comparing to |null|, so we expect 0
    173  */
    174 actual = f6(arrUndef);
    175 expect = 0;
    176 addThis();
    177 
    178 
    179 
    180 
    181 //-----------------------------------------------------------------------------
    182 test();
    183 //-----------------------------------------------------------------------------
    184 
    185 
    186 
    187 function addThis()
    188 {
    189   statusitems[UBound] = status;
    190   actualvalues[UBound] = actual;
    191   expectedvalues[UBound] = expect;
    192   UBound++;
    193 }
    194 
    195 
    196 function test()
    197 {
    198   enterFunc('test');
    199   printBugNumber(bug);
    200   printStatus(summary);
    201 
    202   for (var i=0; i<UBound; i++)
    203   {
    204     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
    205   }
    206 
    207   exitFunc ('test');
    208 }
    209