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Cake day: July 23rd, 2023

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  • It depends on how much regression testing is in place to test that old and refactored code behaviours have the same outputs, and how much budget there is for writing this tests.

    For old financial systems for example, the answer is often to repeat the code again, as there's likely to be little tests to confirm existing behaviour and writing tests around very complex business domains is prohibitively expensive.