[Webkit-unassigned] [Bug 78761] New: overflowRegion tests are flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78761

           Summary: overflowRegion tests are flaky
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: tony at chromium.org
                CC: achicu at adobe.com, mihnea at adobe.com


In http://trac.webkit.org/changeset/107827, I tried to make the webkitOverflowRegion tests non flaky.  The problem is that we're getting a layout before the script runs.  My attempts failed-- the tests still sometimes fail on debug builds on chromium:
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fregions%2Felement-region-overflow-state.html%2Celement-region-overflow-state-vertical-rl.html

It seems weird that this DOM property depends on internal details of whether we've run layout or not.  It seems like it should force a layout when the property is accessed.

The current tests seem incorrect in that the first time we read webkitOverflowRegion we expect undefined.  At that point in time, we should probably get back 'empty'.  'undefined' means that the element is not a region, but it is.

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