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About this Book


Developer testing has been increasing its mindshare significantly among Java developers over the past 10 years or so. Today, no computer science student graduates without having at least read about automated unit tests and their importance in software development. The idea is simple—to ensure that our code works and keeps working—but the skill takes significant effort to learn.

Some of that effort goes to simply writing tests and learning the technology such as a test framework like JUnit. Some of that effort (and quite possibly most of it) that’s required for truly mastering the practice of writing automated unit tests goes to reading test code and improving it. This constant refactoring of tests—trying out different ways of expressing your intent, structuring tests for various aspects of behavior, or building the various objects used by those tests—is our pragmatic way of teaching ourselves and developing our sense for unit tests.



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