Sure, I don't know what the correct term is. But I personally did not really gain anything from the type system that helped me get the logic of the program right. Whether a Turing complete type system "runs" my assertions at compile time, or a test runner does it on save does not make a difference to me. Actually, I could measure the compile time for this simple one-page program in seconds, while the Go tools compile and test a Game of Life implementation in a fraction of a second.