def check_events(self, event: EventEmitter, event_counts: Dict[str, int]):
for event_name in event.event_names:
count = event_counts.get(event_name)
self.assertIsNotNone(count,
"Unexpected event '{}'".format(event_name))
self.assertEqual(
event.listener_count(event_name), count,
"Mismatch event '{}' count. Expected {:d} but have {:d}".
format(event, count, event.listener_count(event_name)))
