Questions and answers
- Is writing tests shortly after code just as good as writing test-first TDD?
Some research seems to suggest that, although it is very difficult to set up a controlled experiment with statistically significant results in this area. One factor we can consider concerns our own personal discipline. If we write tests later, are we sure we will cover everything necessary? I personally have concluded that I would not remember all I needed to cover and would need to make notes. Those notes are perhaps best captured in the form of test code, leading to a preference for test-first TDD.
- How does hexagonal architecture affect TDD?
Hexagonal architecture provides a clean separation between a pure, inner core of domain logic and the outside world. This allows us to mix and match the two schools of TDD knowing that there is a firm boundary in the design up to which we can code. The inner domain model supports entire use cases being unit-tested, as well...
