Add tests of events for customizable select
This adds a test that looks at the event behavior of select,
particularly for interactions that open and close the picker,
and select options.
Change-Id: I5238360cecc83b48b0f8143380018d4781d65c72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6006480
Commit-Queue: Joey Arhar jarhar@chromium.org
Reviewed-by: Joey Arhar jarhar@chromium.org
Auto-Submit: Mason Freed masonf@chromium.org
Cr-Commit-Position: refs/heads/main@{#1383214}