Bug 159211 – Iterable interfaces should have their related prototype @@iterator property writable

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[youenn fablet]

Currently the property is read-only, which is not consistent with JSC iterators.

[youenn fablet]

Created attachment 282245 [details]
Patch

[Chris Dumez]

Comment on attachment 282245 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=282245&action=review

R=me with comments

> Source/WebCore/ChangeLog:5
> +

<rdar://problem/26950766>

> Source/WebCore/ChangeLog:7
> +

Please link to the spec:
http://heycam.github.io/webidl/#es-iterator

> Source/WebCore/ChangeLog:8
> +        Related to radar 26950766.

Move this to the top.

[Chris Dumez]

<rdar://problem/26950766>

[Chris Dumez]

Comment on attachment 282245 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=282245&action=review

> LayoutTests/fast/dom/nodeListIterator.html:90
> +            shouldNotThrow('NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];');

Please also add a check for the value returned by Object.getOwnPropertyDescriptor(NodeList.prototype, Symbol.iterator) to make sure writable is true, enumerable is false and configurable is true. As per the Web IDL spec.

[youenn fablet]

Thanks for the review.

> > Source/WebCore/ChangeLog:5
> > +
> 
> <rdar://problem/26950766>

OK.

> > Source/WebCore/ChangeLog:7
> > +
> 
> Please link to the spec:
> http://heycam.github.io/webidl/#es-iterator

OK.

> > Source/WebCore/ChangeLog:8
> > +        Related to radar 26950766.
> 
> Move this to the top.

OK

> > LayoutTests/fast/dom/nodeListIterator.html:90
> > +            shouldNotThrow('NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];');
> 
> Please also add a check for the value returned by
> Object.getOwnPropertyDescriptor(NodeList.prototype, Symbol.iterator) to make
> sure writable is true, enumerable is false and configurable is true. As per
> the Web IDL spec.

OK
FWIW, I plan to beef-up wpt idlharness.js to have thorough testing of iterable and setlike.

[youenn fablet]

Created attachment 282271 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 282271 [details]
Patch for landing

Clearing flags on attachment: 282271

Committed r202583: <http://trac.webkit.org/changeset/202583>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[youenn fablet]

> FWIW, I plan to beef-up wpt idlharness.js to have thorough testing of
> iterable and setlike.

Related PR is https://github.com/w3c/testharness.js/pull/201