ok,
that's usually called unit testing. Empty the tables of all records, then add test records to verify boundary conditions, invalid conditions etc.
check that these appear in the relevant views as and when expected. Note that this is sometimes not a trivial exercise, so you should script your record deletion and insertion.
obviously take a back up of your data before starting testing, so if it all goes wrong, you can reverse the changes easily.
Regards
T
Grinding away at things Oracular