In which a coworker advocates for "one big refactoring" rather than smaller tests. I suppose it depends on the system and how critical it is. I work for a company that does avionics software and one ...

The lightweight Mikado method opens up a structured way to make significant changes even to complex legacy code.

I wouldn't unit test it, but I would absolutely include the functionality of the legacy code in any regression/integration testing that I did. I would also assign someone to map out the legacy code in ...