I went to a good IEEE CS talk on Sustainable Test Driven Development.
At the end Scott Bain of NetObjectives made a great statement:
All Design Patterns should come with their Unit Testing Test Pattern.
I have heard people ask about patterns for testing Gang of Fout (GoF) Design Patterns and NetObjectives has already documented them (using Mocks, etc.).
He also stated 3 principles which, after the slides are posted, I will comment on — Great unit testing principles