Bug 231623

Summary:	[ iOS15 Debug ] fast/scrolling/ios/click-events-during-momentum-scroll-in-main-frame.html is a flaky timeout
Product:	WebKit	Reporter:	Eric Hutchison <ehutchison>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	bfulgham, ehutchison, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer, wenson_hsieh, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Eric Hutchison 2021-10-12 14:51:27 PDT

fast/scrolling/ios/click-events-during-momentum-scroll-in-main-frame.html

is a flaky timeout on iOS15 Debug

History: https://results.webkit.org/?suite=layout-tests&test=fast%2Fscrolling%2Fios%2Fclick-events-during-momentum-scroll-in-main-frame.html

Build: https://build.webkit.org/#/builders/265/builds/63

Results: https://build.webkit.org/#/builders/265/builds/63

Diff:
--- /Volumes/Data/worker/ipados-simulator-15-debug-tests-wk2/build/layout-test-results/fast/scrolling/ios/click-events-during-momentum-scroll-in-main-frame-expected.txt
+++ /Volumes/Data/worker/ipados-simulator-15-debug-tests-wk2/build/layout-test-results/fast/scrolling/ios/click-events-during-momentum-scroll-in-main-frame-actual.txt
@@ -1,10 +1,8 @@
+FAIL: Timed out waiting for notifyDone to be called
+
 Verifies that tapping the page during momentum scrolling does not dispatch click events to the page. To run the test manually, swipe up to scroll down; while the page is momentum scrolling, tap the screen to interrupt scrolling. The page should not observe any click events.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS document.scrollingElement.scrollTop passed 1000
-PASS successfullyParsed is true
 
-TEST COMPLETE
-

Comment 1 Radar WebKit Bug Importer 2021-10-12 14:51:57 PDT

<rdar://problem/84167605>

Comment 2 Wenson Hsieh 2021-10-12 14:54:54 PDT

This is probably flaky for the same reason as fast/scrolling/ios/click-events-during-momentum-scroll-in-overflow-after-tap-on-body.html (i.e., we're not scrolling as we expected due to the simulated pan gesture).

Comment 3 Eric Hutchison 2021-10-12 14:55:40 PDT

Updated test expectations at https://trac.webkit.org/changeset/284037/webkit

Comment 4 Wenson Hsieh 2021-10-12 14:56:48 PDT

(In reply to Wenson Hsieh from comment #2)
> This is probably flaky for the same reason as
> fast/scrolling/ios/click-events-during-momentum-scroll-in-overflow-after-tap-
> on-body.html (i.e., we're not scrolling as we expected due to the simulated
> pan gesture).

(...prior to r280937, that is)

Comment 5 Eric Hutchison 2021-10-29 19:27:02 PDT

Unable to reproduce locally using run-webkit-tests --debug --ios-simulator --iterations 500 --exit-after-n-crashes-or-timeouts 1 --force --clobber-old-results fast/scrolling/ios/click-events-during-momentum-scroll-in-main-frame.html