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That might be a very naive view of things, but can't you extract a test suite of the current system (including non-regression tests) to use it to develop the ne

by Zababa 5y ago

That might be a very naive view of things, but can't you extract a test suite of the current system (including non-regression tests) to use it to develop the new system? Or do it part by part, ship of Theseus style?

Const-me 5y ago
Not sure that gonna work. Operating systems abstract away hardware differences, and providing portable APIs to userspace processes. Internally, OS kernels are spending non-trivial complexity dealing with random hardware shenanigans. Can't unit test them.