a test for stringify "whitelist" which WebKit fails

Allen Wirfs-Brock Allen.Wirfs-Brock at microsoft.com
Thu Aug 27 20:40:07 PDT 2009


Yes, when the spec. says ToString it really does mean to fully apply the ToString algorithms.  This is a good test case to have.

Allen

>-----Original Message-----
>From: Oliver Hunt [mailto:oliver at apple.com]
>Sent: Thursday, August 27, 2009 4:33 PM
>To: Allen Wirfs-Brock
>Cc: Hallvord R. M. Steen; es-discuss at mozilla.org
>Subject: Re: a test for stringify "whitelist" which WebKit fails
>
>Do we intend that
>
>str = new String("foo");
>str.toString=function(){ alert("Wiffle"); }
>JSON.stringify(..., [str])
>
>will execute the custom toString?
>
>--Oliver
>
>On Aug 27, 2009, at 7:47 AM, Allen Wirfs-Brock wrote:
>
>> This is a fairly recent (last couple months, I believe) change to
>> the spec.  The whitelist used  to require strings. It now may
>> contain strings, numbers, string objects, or number objects.  They
>> all get converted to string values.  See stringify steps 4.b.ii.2-4.
>>
>> Allen
>>
>>> -----Original Message-----
>>> From: es-discuss-bounces at mozilla.org [mailto:es-discuss-
>>> bounces at mozilla.org] On Behalf Of Hallvord R. M. Steen
>>> Sent: Thursday, August 27, 2009 4:44 AM
>>> To: Oliver Hunt
>>> Cc: es-discuss at mozilla.org
>>> Subject: a test for stringify "whitelist" which WebKit fails
>>>
>>> Hi Oliver,
>>> I'm curious about this TC - it appears to be WebKit against the
>>> rest of
>>> us, but it will take me some assistance from somebody with Superior
>>> Spec-Reading Skills to figure out who does the right thing..
>>>
>>> http://testsuites.opera.com/JSON/correctness/046.html
>>>
>>> (test code is at
>>> http://testsuites.opera.com/JSON/correctness/scripts/046.js )
>>>
>>> Issue: if an object has properties whose name is a number inside a
>>> string
>>> ({'1':'foo'}) and you pass in a white-list array to stringify(),
>>> WebKit
>>> requires the elements in the array to be numbers inside strings too,
>>> while
>>> other implementations allow either plain numbers or numbers inside
>>> strings.
>>>
>>> The latter makes more sense to me given that JS generally doesn't
>>> distinguish obj[1] and obj['1']. Do you think this is a WebKit bug?
>>>
>>> --
>>> Hallvord R. M. Steen, Core Tester, Opera Software
>>> http://www.opera.com http://my.opera.com/hallvors/
>>> _______________________________________________
>>> es-discuss mailing list
>>> es-discuss at mozilla.org
>>> https://mail.mozilla.org/listinfo/es-discuss
>>
>



More information about the es-discuss mailing list