July 9, 2013
Short answer: yes, but not until recently. Long answer: when you cut your front end teeth being a contract front end developer working for some rather persnickety Hollywood print marketing design people desperately trying to apply the same rules to web design, one grows far too accustomed to building solutions that are extremely flexible in all the least expected places. Now that I'm the happiest developer in the world over at ZEFR in Venice Beach, I'm building the polar opposite of the turn-and-burn front end framework. I.e. a way of getting developers who wouldn't even necessarily consider themselves "front end" developers to be able to build completely reusable, portable front end components. Needless to say, when you're going about building a platform for reusable development modules: testing becomes a pleasant necessity. So nowadays, absofrackinglutely yes I write tests. In fact, I'm attempting to make it trivial for white-box testers to do it for me/us.
My first post-college job was so bad I became a professional actor for two years - in Colorado. I'm back now. :) Behold the happiest developer you're likely to ever meet.