Well it depends on the code quality. If you have a system which is actually testable (with some mocking) then it is fine. You are in trouble however if that sys

Well it depends on the code quality. If you have a system which is actually testable (with some mocking) then it is fine. You are in trouble however if that system is full of tight coupled components, static calls, inlined cache layers and so on. So you can't say "Yes" or "No" because it depends on the context.