tests/mozilla/js1_5/Regress/regress-146596.js

   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
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  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):  jim-patterson@ncf.ca, brendan@mozilla.org,
  21 *                  pschwartau@netscape.com
  22 *
  23 * Alternatively, the contents of this file may be used under the terms of
  24 * either the GNU General Public License Version 2 or later (the "GPL"), or
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  36 *
  37 *
  38 * Date:    18 Jun 2002
  39 * SUMMARY: Shouldn't crash when catch parameter is "hidden" by varX
  40 * See http://bugzilla.mozilla.org/show_bug.cgi?id=146596
  41 *
  42 */
  43 //-----------------------------------------------------------------------------
  44 var UBound = 0;
  45 var bug = 146596;
  46 var summary = "Shouldn't crash when catch parameter is 'hidden' by varX";
  47 var status = '';
  48 var statusitems = [];
  49 var actual = '';
  50 var actualvalues = [];
  51 var expect= '';
  52 var expectedvalues = [];
  53
  54
  55 /*
  56  * Just seeing we don't crash when executing this function -
  57  * This example provided by jim-patterson@ncf.ca
  58  *
  59  * Brendan: "Jim, thanks for the testcase. But note that |var|
  60  * in a JS function makes a function-scoped variable --  JS lacks
  61  * block scope apart from for catch variables within catch blocks.
  62  *
  63  * Therefore the catch variable hides the function-local variable."
  64  */
  65 function F()
  66 {
  67   try
  68   {
  69     return "A simple exception";
  70   }
  71   catch(e)
  72   {
  73     var e = "Another exception";
  74   }
  75
  76   return 'XYZ';
  77 }
  78
  79 status = inSection(1);
  80 actual = F();
  81 expect = "A simple exception";
  82 addThis();
  83
  84
  85
  86 /*
  87  * Sanity check by Brendan: "This should output
  88  *
  89  *             24
  90  *             42
  91  *          undefined
  92  *
  93  * and throw no uncaught exception."
  94  *
  95  */
  96 function f(obj)
  97 {
  98   var res = [];
  99
 100   try
 101   {
 102     throw 42;
 103   }
 104   catch(e)
 105   {
 106     with(obj)
 107     {
 108       var e;
 109       res[0] = e; // |with| binds tighter than |catch|; s/b |obj.e|
 110     }
 111
 112     res[1] = e;   // |catch| binds tighter than function scope; s/b 42
 113   }
 114
 115   res[2] = e;     // |var e| has function scope; s/b visible but contain |undefined|
 116   return res;
 117 }
 118
 119 status = inSection(2);
 120 actual = f({e:24});
 121 expect = [24, 42, undefined];
 122 addThis();
 123
 124
 125
 126
 127 //-----------------------------------------------------------------------------
 128 test();
 129 //-----------------------------------------------------------------------------
 130
 131
 132
 133 function addThis()
 134 {
 135   statusitems[UBound] = status;
 136   actualvalues[UBound] = actual.toString();
 137   expectedvalues[UBound] = expect.toString();
 138   UBound++;
 139 }
 140
 141
 142 function test()
 143 {
 144   enterFunc('test');
 145   printBugNumber(bug);
 146   printStatus(summary);
 147
 148   for (var i=0; i<UBound; i++)
 149   {
 150     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
 151   }
 152
 153   exitFunc ('test');
 154 }