@gaoethan When I restructured your test here: https://github.com/gaoethan/message_filters-1/blob/32898573597eb115f3d4d6cb24aeace6e4ad3eca/test/test_fuzz.cpp I assumed that it had been copied from somewhere due to the 2008 Willow Garage copyright. However looking at it I cannot find where it came from as imported here: 193cf7b#diff-3969d386a591d68079e4e7903ef87e13

Did it start as another file and you modified it?

@tfoote Actually, it's more like the tests within time_sequencer_unittest.cpp but with self-defined messages, you can see they have similiar code structure, thanks !