Working Effectively With Legacy Code.pdf

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1、WorkingEffectivelyWithLegacyCodeLastchange:2/26/20031:58PMMichaelFeathersmfeathers@objectmentor.comCopyright©2003,MichaelC.Feathers,AllRightsReserved1Acknowledgements...............................................................................................

2、..............4Introduction.........................................................................................................................5WhatisLegacyCode?...............................................................................................

3、.........7GettingaSystemunderTest...............................................................................................9CharacterizationTests.......................................................................................................10Gettin

4、gTestsinPlace.......................................................................................................13SmokeTests..................................................................................................................13ToolsoftheTrade..

5、...........................................................................................................14InvitroHarness.............................................................................................................14InvivoHarness..............

6、...............................................................................................14SoftwarePlumbing............................................................................................................16TheMaterialofSoftware.................

7、.............................................................................16WhyIsFlexibleMaterialImportant?............................................................................18SensingandSeparating.....................................................

8、................................................19SensingChange.............................................................................................................2