I believe you came to a result to quickly by the way you measure the code bases chosen. Lot's of things here that you rund over very quickly without showing any

I believe you came to a result to quickly by the way you measure the code bases chosen. Lot's of things here that you rund over very quickly without showing anything to back up you right/wrong results. And sure, tests is of course having an impact on design. As it should have. There is consensus around, at least for the oop paradigm, that this is the case. I also belive you try to make a once size fit all for measuring tests and that is simply not fair in terms of how differently these codebases are designed and implemented.