Bug 181888 – Layout Test http/wpt/web-animations/timing-model/animation-effects/current-iteration.html is a flaky failure

• Component: Animations
• Status: RESOLVED CONFIGURATION CHANGED

[Ryan Haddad]

The following layout test is flaky on macOS and iOS

http/wpt/web-animations/timing-model/animation-effects/current-iteration.html

Probable cause:

https://trac.webkit.org/changeset/227208/webkit

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Fwpt%2Fweb-animations%2Ftiming-model%2Fanimation-effects%2Fcurrent-iteration.html

--- /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/http/wpt/web-animations/timing-model/animation-effects/current-iteration-expected.txt
+++ /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/http/wpt/web-animations/timing-model/animation-effects/current-iteration-actual.txt
@@ -1,5 +1,7 @@
 
-PASS Test currentIteration during before and after phase when fill is none 
+Harness Error (TIMEOUT), message = null
+
+TIMEOUT Test currentIteration during before and after phase when fill is none Test timed out
 FAIL Test zero iterations: iterations:0 iterationStart:0 duration:0 delay:1 fill:both assert_equals: Value of currentIteration in the before phase expected (number) 0 but got (object) null
 FAIL Test zero iterations: iterations:0 iterationStart:0 duration:100 delay:1 fill:both assert_equals: Value of currentIteration in the before phase expected (number) 0 but got (object) null
 FAIL Test zero iterations: iterations:0 iterationStart:0 duration:Infinity delay:1 fill:both assert_equals: Value of currentIteration in the before phase expected (number) 0 but got (object) null

[Radar WebKit Bug Importer]

<rdar://problem/36678322>

[Ryan Haddad]

Marked test as flaky in https://trac.webkit.org/r227255

[Antoine Quint]

I'm working on a series of patches that will eventually make this WPT test have a 100% pass rate and not be flaky anymore. This should all land within the week.

[Antoine Quint]

The test has since moved to imported/w3c/web-platform-tests/web-animations/timing-model/animation-effects/current-iteration.html and passes reliably.