pjs/js/tests/ecma_3/Object/regress-72773.js

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JavaScript

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*
* Date: 09 May 2001
*
* SUMMARY: Regression test: we shouldn't crash on this code
* See http://bugzilla.mozilla.org/show_bug.cgi?id=72773
*
* See ECMA-262 Edition 3 13-Oct-1999, Section 8.6.2 re [[Class]] property.
*
* Same as class-001.js - but testing user-defined types here, not native types.
* Therefore we expect the [[Class]] property to equal 'Object' in each case -
*
* The getJSClass() function we use is in a utility file, e.g. "shell.js"
*/
//-------------------------------------------------------------------------------------------------
var bug = 72773;
var summary = "Regression test: we shouldn't crash on this code";
var status = '';
var actual = '';
var expect = '';
var sToEval = '';
/*
* This code should produce an error, but not a crash.
* 'TypeError: Function.prototype.toString called on incompatible object'
*/
sToEval += 'function Cow(name){this.name = name;}'
sToEval += 'function Calf(str){this.name = str;}'
sToEval += 'Calf.prototype = Cow;'
sToEval += 'new Calf().toString();'
status = 'Trying to catch an expected error';
try
{
eval(sToEval);
}
catch(e)
{
actual = getJSClass(e);
expect = 'Error';
}
//----------------------------------------------------------------------------------------------
test();
//----------------------------------------------------------------------------------------------
function test()
{
enterFunc ('test');
printBugNumber (bug);
printStatus (summary);
reportCompare(expect, actual, status);
exitFunc ('test');
}