Nice article on Unit Test Patterns by Marc Clifton:
http://www.codeproject.com/KB/architecture/autp5.aspx
Patterns he has listed:
· Pass/Fail Patterns
· Data Driven Test Patterns
· Data Transaction Patterns
· Collection Management Patterns
· Performance Patterns
· Process Patterns
· Simulation Patterns
· Multithreading Patterns
· Stress-Test Patterns
· Presentation Layer Patterns