> it's hard to properly define when the system under test behaves unexpectedly... I feel your pain. I think at that point it's good to look deeper and ask if

> it's hard to properly define when the system under test behaves unexpectedly... I feel your pain. I think at that point it's good to look deeper and ask if exceptions are being properly thrown, as I try to call for in the final section on Exceptions. You can't plan for everything.