[Ruby] testing advice

[ben wiseley]

I wrote a plugin ( http://acts-as-tsearch.rubyforge.org/ ) which still needs
lots of work before it's ready for prime time.  Primarily it needs unit
tests.  Since it's a very database search specific plugin I was thinking the
best way to do this would be to create a separate testing rails app.  Is
this the wrong way to go about testing plugins?  I notice none of the other
plugins I have have their own unit tests (acts_as_ferret, engines,
exception_notification, etc.) - so is this the normal way to go about
testing plugins?

-ben