- They're Fast
EasyMock
- Use when a Hand-rolled mock will be very large and/or cumbersome
- If you do not need any PowerMock features
PowerMock
- Hard to trace using debugger
- If you need assumptions about the internal code that cannot be reached by EasyMock
- For testing with statics and singletons
- For testing difficult to mock classes like java.io.File
- For accessing private fields
- For suppressing methods
