question: How do unit tests stay green when you rewrite in another language? Are... | Hacker News

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		3a2d29 on Nov 25, 2022 \| parent \| context \| favorite \| on: Ask HN: Why the Linux Kernel doesn't have unit tes... question: How do unit tests stay green when you rewrite in another language? Are your tests an external API you call?

wstuartcl on Nov 26, 2022 [–]

Rewrites are not super common -- but IMHO if you must do one the first step is to move the tests over. Unless your goal with the rewrite is to rearchitect the interfaces at which point your basically greenfielding anyways.

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