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Automated Functional Testing Article

It looks like Mr. Sutherland's article on functional testing vs. unit testing has been around for a while, but I just came across it via Hacker News.

Benefits of automated functional testing

My experience with unit tests has been largely ad-hoc, for example when I'm working with a bug-prone chunk of code. I've never been part of a large system with solid unit test coverage or worked in a TDD environment. That being said, I agree with the general premise of Tim's message. As the release manager (by default) on a fairly complex java system, having a number of solid automated functional tests was very valuable to prevent a lot of wasted testing time during busy release weekends. The ROI of creating and maintaining a large set of unit tests seems to be much less.
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Matthew said…
I disagree - my friend makes an excellent point here by making an analogy to real-world practically. http://app.arat.us/blog/?p=159

Unit and functional tests both are critical to a robust testing strategy.

We have been practicing TDD now for a bit in our development and it REALLY speeds things up and really helps keep design concrete.
July 8, 2009 at 3:50 PM
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