I write tests as I develop, and they take the place of going to the browser or a repl and poking around at my work. In some sense, testing takes zero or negati

I write tests as I develop, and they take the place of going to the browser or a repl and poking around at my work. In some sense, testing takes zero or negative net time. It would be hard to measure gross time, because it occurs in such small increments.