Bug 189678 – [macOS WK1] Layout Test webanimations/accelerated-transition-interrupted-on-composited-element.html is a flaky image failure

• Status: RESOLVED
• Resolution: FIXED
• Component: Animations

[Ryan Haddad]

The following layout test is flaky on macOS WK1

webanimations/accelerated-transition-interrupted-on-composited-element.html

Probable cause:

The first failure was seen shortly after it was added in https://trac.webkit.org/changeset/235843/webkit, so it may be flaky from the start.

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webanimations%2Faccelerated-transition-interrupted-on-composited-element.html

Link to failure with image diff showing a black square appearing closer to the left than expected:
https://build.webkit.org/results/Apple%20Sierra%20Debug%20WK1%20(Tests)/r235845%20(9470)/results.html

[Radar WebKit Bug Importer]

<rdar://problem/44621674>

[Antoine Quint]

I can remove the flakiness with using a double rAF to conclude it. Additionally, we can improve the test by using a "transitioncancel" event.

[Antoine Quint]

Created attachment 366717 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 366717 [details]
Patch

Clearing flags on attachment: 366717

Committed r243878: <https://trac.webkit.org/changeset/243878>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.