[BJanecke]

So generally, I write a test when I want to make an assumption an certainty. If I can't be certain that something is doing what it's supposed to I write a test for it, make sense?

So

``` Int => add(x, y) => x + y; ```

Doesn't get a test, however

``` Int => formulateIt(x, y) => (x * y)^y ```

Does