Bug 192881

Summary: [ Mojave WK1 ] Layout Test webanimations/accelerated-* is flaky
Product: WebKit Reporter: Truitt Savell <tsavell>
Component: Tools / TestsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ap, graouts, jlewis3, lforschler, ryanhaddad
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=192879
https://bugs.webkit.org/show_bug.cgi?id=193091
https://bugs.webkit.org/show_bug.cgi?id=193108

Description Truitt Savell 2018-12-19 14:17:35 PST
The following layout tests are flaky on MacOS Mojave

webanimations/accelerated-animation-with-delay-and-seek.html
webanimations/accelerated-animation-with-delay.html 
webanimations/accelerated-transition-by-removing-property.html

Probable cause:

These three tests are image failures that fail in tandem. these tests are failing to draw something and instead have a blank screen. 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webanimations%2Faccelerated-animation-with-delay-and-seek.html%20webanimations%2Faccelerated-animation-with-delay.html%20webanimations%2Faccelerated-transition-by-removing-property.html

Link to Failures:
https://build.webkit.org/results/Apple%20Mojave%20Debug%20WK1%20(Tests)/r239381%20(1250)/results.html
Comment 1 Ryan Haddad 2018-12-20 17:52:42 PST
This looks a lot like the DRT snapshotting issue I thought we already addressed.