Test-driven development never made a lot of sense to me. But I write code that deals with messy, poorly documented external real-time services that cannot be m

Test-driven development never made a lot of sense to me. But I write code that deals with messy, poorly documented external real-time services that cannot be mocked without an absurd amount of effort. I try to pull out the bits of more pure code that I can and get that under test, but trying to go much further than that is counterproductive.