http://michaelfeathers.typepad.com/michael_feathers_blog/2008/06/the-flawed-theo.html
blog-post-the-flawed-theory-behind-unit-testing#testing-forces-reflection-on-code1 2 "The interesting thing is there are a number of things that work. Design by Contract works. Test Driven Development works. So do Clean Room, code inspections and the use of higher-level languages. All of these techniques have been shown to increase quality. And, if we look closely we can see why: all of them force us to reflect on our code." blog-post-the-flawed-theory-behind-unit-testing#testing-forces-reflection-on-code1 2