Bug 111116 – Disable window occlusion detection for WebKitTestRunner Web View on Mac

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Kiran Muppala]

Window Occlusion Notifications on Mac mark the WebKitTestRunner's WebView as not visible as soon as created.  On Mac this enables JavaScript timer throttling and hence causes the following layouts tests to fail.

fast/dom/timer-increase-min-interval-and-reset-part-2.html
fast/dom/timer-increase-then-decrease-min-interval-repeating.html
fast/dom/timer-increase-then-decrease-min-interval.html    
fast/dom/timer-throttling-hidden-page.html

This issue was initially fixed by just setting the page visibility to "visible" after creating the WebView in https://bugs.webkit.org/show_bug.cgi?id=111025.  But, it is not very robust, since the view still thinks it is invisible and this might cause other tests to fail.  Hence, using the private API being added by https://bugs.webkit.org/show_bug.cgi?id=111107, to disable window occlusion detection entirely for the WebKitTestRunner's web view is a better solution.

[Kiran Muppala]

<rdar://problem/13305561>

[Kiran Muppala]

Created attachment 190862 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 190862 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=190862&action=review

> Tools/ChangeLog:11
> +        Window occlusion notifications on Mac cause the WebKitTestRunner's
> +        Web View to be treated as invisible and this automatically enables
> +        JavaScript timer throttling, causing some layout tests exercising
> +        JavaScript timers to fail.  Hence, disable window occlusion detection.

This doesn't seem to match the patch (yes, I know it's a follow-up but should not be copied from the other bug).

[Kiran Muppala]

Created attachment 190869 [details]
Patch

[Kiran Muppala]

(In reply to comment #3)
> (From update of attachment 190862 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=190862&action=review
> 
> > Tools/ChangeLog:11
> > +        Window occlusion notifications on Mac cause the WebKitTestRunner's
> > +        Web View to be treated as invisible and this automatically enables
> > +        JavaScript timer throttling, causing some layout tests exercising
> > +        JavaScript timers to fail.  Hence, disable window occlusion detection.
> 
> This doesn't seem to match the patch (yes, I know it's a follow-up but should not be copied from the other bug).

You're right, I wrote the change log as if I was fixing the tests, while they have already been fixed.  Corrected the ChangeLog.

[WebKit Review Bot]

Comment on attachment 190869 [details]
Patch

Clearing flags on attachment: 190869

Committed r144415: <http://trac.webkit.org/changeset/144415>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.