Adding characterization tests to a legacy java code command line application. Running into the legacy code dilemma because of dependencies to the System global.
I found the code thanks to Ted Young, check out his quality coding twitch stream.
Where the code originates from: stackexchange post
Recommended book: Working Effectively With Legacy Code
Recommended talk: Michael Feathers - the deep synergy between testability and good design.
The 3rd party lib i used for Characterization Testing: Seamer.
Post about Preparatory Refactoring.
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