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Thursday, December 30, 2010

Specifying Behaviour vs Specifying Implementation

At the JRubyConf in Columbus, Ohio last October, Jim Weirich presented "Testing – Why Don't We Do It Like This?". At the end of the presentation he suggested asking two questions to ensure our tests are specifying behaviour rather than implementation:

  1. If I wanted to use this software in my project, what behaviours are important to me?
  2. Could I write this software from scratch using only the tests/specs as guidance?

These are definitely useful questions to ask, rather than blindly writing specs to simply get 100% test coverage. Check the entire presentation below:

Testing – Why Don't We Do It Like This? – Jim Weirich from Engine Yard on Vimeo.

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