Comment by piva00

If Google spent Moon-landing level of money in their quality/deployment infrastructure I expect a much better coverage checker than "100% unit tested", they are famous for having a whole fuzzing infrastructure, coverage analysers for more complex interplay of logic is something I use daily in a non-Google levels of spending (even though still a big enough corporation) which often reminds me that I forgot to write a functional test to cover a potential orchestration issue.

I don't think "completely untested" is correct but tested way below expectations for such structural piece of code is a lesson they should learn, it does look like an amateur-hour mistake.