[Scarblac]

It wasn't a direct quote, but an idea I've heard repeated many times.

And integration tests are nice, but the idea of testing small units was that every branch in the code under test doubles the number of possible execution paths, so tmit becomes harder and harder to test every path.

So we should branch less, I guess. His parts about "define errors put of existence" and writing more general code with fewer obscure details would probably help.