installEventFilter() prepends new objects to the eventList, so that
events that are posted while processing events are left to the next
round of event processing.
This is a baseline test to check that subsequent commits preserve the
current behavior.
QCOMPARE_GT is available since Qt6.4, so make the check backportable to
older releases too.
Pick-to: 6.7 6.6 6.5 6.2 5.15
Task-number: QTBUG-120779
Change-Id: I5ed5e9c2917a9be62de4af19c3b72889399b4fe6
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
1fe88bf4cd