> If you can test each part of a system independently, and the parts connect in a reasonably trivial fashion, it’s about as good as testing the whole.
Not really, which is why integration tests are so important.
Not really, which is why integration tests are so important.
That said, software testing isn't really an apt analogy now that I give it some thought. Testing real world equipment has to contend with a lot more edge cases and environmental factors.