Unit Test
Test the most smallest unit (method)
Test Double
- Replace a real implementation
- Break dependency via Dependency Injection
Test Double Types
- Dummy (empty fake object)
- Fake (simplified but anyway working fake object)
- Stub (fake object w/ no logic, pre-programmed return values)
- Spy (log the actual object)
- Mock (fake object w/ no logic, check the internal behavior of the object)
Test Double Spectrum
