Well, you obviously are doing something more than just
Class::DBI is doing, otherwise you wouldn't have subclassed it!
Maybe you could test that the My::DBI::Foo class does or doesn't have a bar() method or a 'baz' column. Maybe you need to test your collections to make sure the right thing comes back? has_a()/has_many()/might_have() all need tested to make sure you're returning the right class.
These tests are going to be very simple and should run very quickly. But, they provide some sort of safety net for you to program against. Remember - most safety nets are built with twine. :-)
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.
