Never did TDD as prescribed. But I try to write one test together with the implementation, to have basic coverage to cover the most silly things, and to ensure

Never did TDD as prescribed. But I try to write one test together with the implementation, to have basic coverage to cover the most silly things, and to ensure testability. This way it is easy to add more tests later, if and when I find that they are needed. Also I try to test at subsystem / API boundaries whenever possible. Small units like a function rarely get their own tests, they are covered implicitly by being used. This avoids tests of arbitary internals (that should be free to change) becoming a maintenance burden. External APIs should be stable.