Summary
In this chapter, we have discussed TDD and BDD and explained how even though they are not necessarily part of the DDD framework, they are certainly complementary patterns that are worth knowing. Even on projects where you do not opt to follow DDD, it is worth following TDD.
Even on side projects, I often use TDD as a form of documentation. It means that if I do not work on the project for multiple months, the tests help me jump straight back in.