Description:
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-fired-for-mandatory-snap-point-after-load.html 
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-handler-content-attributes.html
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-not-fired-on-no-scroll.html

The test was added at 264126@main as part of a resync web-platform-tests/dom from upstream and has been a consistent failure since then.  The tests appear to be missing their baselines and show on the flakiness dashboard as warnings.

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fdom%2Fevents%2Fscrolling%2Fscrollend-event-fired-for-mandatory-snap-point-after-load.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fdom%2Fevents%2Fscrolling%2Fscrollend-event-handler-content-attributes.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fdom%2Fevents%2Fscrolling%2Fscrollend-event-not-fired-on-no-scroll.html

Diff:
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-fired-for-mandatory-snap-point-after-load.html

scrollend + mandatory scroll snap test

Page 1

Page 2

Page 3

Page A

Page B

Page C


FAIL scrollend event fired after load for mandatory snap point promise_test: Unhandled rejection with value: "No scrollend event received for target [object HTMLDivElement]"

---------------------
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-handler-content-attributes.html

Harness Error (TIMEOUT), message = null

FAIL Tests scrollend event is handled by event handler content attribute. promise_test: Unhandled rejection with value: "DIV did not receive scrollend event."
PASS Tests scrollend event is not fired to document body event handler content attribute.
TIMEOUT Tests scrollend event is fired to document event handler property Test timed out
NOTRUN Tests scrollend event is fired to element event handler property

---------------------
imported/w3c/web-platform-tests/dom/events/scrolling/scrollend-event-not-fired-on-no-scroll.html

target
doc

FAIL No scroll via wheel on div shouldn't fire scrollend. promise_test: Unhandled rejection with value: object "Error: Unknown source type "wheel"."
PASS No scroll via keys on div shouldn't fire scrollend.
FAIL No scroll via wheel on document shouldn't fire scrollend. promise_test: Unhandled rejection with value: object "Error: Unknown source type "wheel"."
PASS No scroll via keys on document shouldn't fire scrollend.