tests/mozilla/ecma_3/Object/regress-72773.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 IS"
   8 * basis, WITHOUT WARRANTY OF ANY KIND, either expressed
   9 * or 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. All
  17 * Rights Reserved.
  18 *
  19 * Contributor(s): pschwartau@netscape.com
  20 * Date: 09 May 2001
  21 *
  22 * SUMMARY: Regression test: we shouldn't crash on this code
  23 * See http://bugzilla.mozilla.org/show_bug.cgi?id=72773
  24 *
  25 * See ECMA-262 Edition 3 13-Oct-1999, Section 8.6.2 re [[Class]] property.
  26 *
  27 * Same as class-001.js - but testing user-defined types here, not native types.
  28 * Therefore we expect the [[Class]] property to equal 'Object' in each case -
  29 *
  30 * The getJSClass() function we use is in a utility file, e.g. "shell.js"
  31 */
  32 //-------------------------------------------------------------------------------------------------
  33 var bug = 72773;
  34 var summary = "Regression test: we shouldn't crash on this code";
  35 var status = '';
  36 var actual = '';
  37 var expect = '';
  38 var sToEval = '';
  39
  40 /*
  41  * This code should produce an error, but not a crash.
  42  *  'TypeError: Function.prototype.toString called on incompatible object'
  43  */
  44 sToEval += 'function Cow(name){this.name = name;}'
  45 sToEval += 'function Calf(str){this.name = str;}'
  46 sToEval += 'Calf.prototype = Cow;'
  47 sToEval += 'new Calf().toString();'
  48
  49 status = 'Trying to catch an expected error';
  50 try
  51 {
  52   eval(sToEval);
  53 }
  54 catch(e)
  55 {
  56   actual = getJSClass(e);
  57   expect = 'Error';
  58 }
  59
  60
  61 //----------------------------------------------------------------------------------------------
  62 test();
  63 //----------------------------------------------------------------------------------------------
  64
  65
  66 function test()
  67 {
  68   enterFunc ('test');
  69   printBugNumber (bug);
  70   printStatus (summary);
  71
  72   reportCompare(expect, actual, status);
  73
  74   exitFunc ('test');
  75 }