Bug 233234

Summary: Need a way to test scrolling momentum animations
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Tools / TestsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   

Description Simon Fraser (smfr) 2021-11-16 20:24:41 PST 
Currently WheelEventTestMonitor doesn't know about momentum animations, but even if it did, it's impossible to write a test that determines whether an "End" momentum event has interrupted the momentum. This is because we start the animator when we see the momentum "Began", ignoring the rest of the momentum changed. The animator runs on a display link callback on the scrolling thread, so we don't have a reliable way to know when the animator has run enough frames to move content around.
Comment 1 Radar WebKit Bug Importer 2021-11-23 20:25:19 PST 
<rdar://problem/85716526>