add tests for redirects.utils


![screen shot 2014-11-03 at 4 37 38 pm](https://cloud.githubusercontent.com/assets/2447636/4893028/e42dc4b6-63ba-11e4-834d-afecdd2e0e4a.png)
Wrote some tests for the sole function in redirects.utils - just checking in early to see if I'm going about it right so far...