Steve Freeman On TDD: How Do We Know When We’re Done?
Writing a test makes you clarify your ideas about what needs to be done, and making the test pass means that you know that you've added a little more functionality today. Having a comprehensive suite of tests gives you the confidence to get on with things because you can tell when you've broken the system, and tests that are difficult to write show you where you need to improve.
Steve was a pioneer of Agile software development in the UK, he has given training courses in Europe, America, and Asia. Previously, he worked in research labs, software houses, earned a PhD, and wrote shrink-wrap software for IBM. Steve also teaches in the Computer Science department at University College London.
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