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'''Behavior Driven Development''' (BDD) is a programming technique which emphasizes the specification of the behavior of software at a very fine level of granularity. BDD is a variant of or perhaps a reaction to [[Test-driven development|test driven development]].
It changes the focus from thinking in terms of testing to thinking about ''behavior''. In TDD you write a test, have it fail, and then have it pass by writing code. In BDD, you think of a specification in a given context, using method names beginning with "should". These define the behavior of the class you are writing, so a method called <tt>shouldDoSomethingCool</tt> in a class <tt>FooBehavior</tt> would be read as: ''Class Foo '''should''' do something cool.''
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