(mentions unit testing and integration testing and behaviorable driven development)
--mentions that mocha is a behavior driven testing framework that lets you chose your assertion library (she is using chai as her assertion library)
-- get requirements from product people...
Test-driven development: Write better code in less time by Evan Dorn
-- write cleaner, better code, faster...
oops, I already wrote the code?
Here is a gentler introduction to Unit testing with example from Udacity: