Test-Driven Development (TDD) has been so successful that it’s now unfashionable. But many developers complain that being required to write tests just gets in the way of shipping features. That wasn’t our experience when we first stumbled onto TDD a dozen years ago, so what went wrong? Were we fooling ourselves, or did the message get confused along the way?
In this session, I will revisit the basics, the essence of what makes TDD work. I will look at some of the common difficulties that I see with teams that are struggling. I will show how understanding the principles means that we can use tests to help us deliver more effectively.
I will run through some bad test examples, then show how they could be improved. Then I try to think about what effective TDD looks like, and why that might be so.
Steve Freeman, author of 'Growing Object Oriented Software, Guided by Tests' (Addison-Wesley), was a pioneer of agile software development in the UK. He is currently is a distinguished consultant with Zuhlke Engineering Limited.
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