Improved test for Yesod

I improved the Yesod test by moving out of the SQL transaction the random number(s) generation.

Also, I joined a funny cat to thank you for the great job you're doing :).
![ONp4zqB](https://f.cloud.github.com/assets/1006806/347254/2c00e1a0-9eb5-11e2-9eb7-b4b8f472e9f9.gif)