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Working Effectively with Legacy Code 208

Posted by samzenpus from the read-all-about-it dept.
Merlin42 writes "I recently took a Test-Driven-Development (TDD) training course and the teacher recommended that I read "Working Effectively with Legacy Code" by Michael Feathers. First things first, a note about the title. Feathers defines "Legacy Code" a bit different than you may expect, especially if you are not into the XP/Agile/TDD world. I have heard (and used) a number of definitions for "legacy code" over the years. Most of these definitions have to do with code that is old, inherited, difficult to maintain, or interfaces with other 'legacy' hardware/software. Feathers' definition is 'code without tests.' For those not into TDD this may seem odd, but in the TDD world, tests are what make code easy to maintain. When good unit tests are in place, then code can be changed at will and the tests will tell automatically you if you broke anything." Read on for the rest of Kevin's review.

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