This is a guest post by R. Tyler Croy, who is a long-time contributor to Jenkins and the primary contact for Jenkins project infrastructure. He is also a Jenkins Evangelist at CloudBees, Inc. When the Ruby on Rails framework debuted it changed the industry in two noteworthy ways: it created a trend of opinionated web application frameworks (Django, Play, Grails) and it also strongly encouraged thousands of developers to embrace test-driven development along...