Separated the test from implementation and refactoring.
This will simplify the review phase because to start from strach you can simply delete all stored procedures in the dbo schema (turning all tests into red).
Deleted this stored procedures as was added by mistake when I created the blog post http://www.andreaangella.com/2014/06/store-procedure-to-calculate-expressions.html
Refactoring of employees full names test and extracted implementation into stored procedure.