interface{} isn’t pervasive in Go, it doesn’t tend to get abused often in practice, it has nothing to do with OO at all, and it doesn’t lead to any particular i

interface{} isn’t pervasive in Go, it doesn’t tend to get abused often in practice, it has nothing to do with OO at all, and it doesn’t lead to any particular ideology about unit testing. It seems like you are mistaken on all counts.