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Test driven refactoring vs composite refactoring

 
Pradeep bhatt
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What is the difference between the two? Does test-driven refactoring involve replacing the code and conmposite approach is just rearranging the code.

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Edwin Keeton
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Quoting from Chapter 2 Kerievsky's book, Refactoring to Patterns:

A test-driven refactoring involves applying testdriven
development to produce replacement code and then swap out old code
for new code (while retaining and rerunning the old code�s tests).


Composite refactorings are high-level refactorings composed of low-level refactorings.


Read it here
 
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