I don't ever unconditionally trust code, but my faith rises: * a little, if it passes a decent unit and/or integration test suite; * a fair bit more, if it su

I don't ever unconditionally trust code, but my faith rises: * a little, if it passes a decent unit and/or integration test suite; * a fair bit more, if it survives a round with humans who didn't write it but did set out to break it; * quite a bit more, once it's been in production for a while without complaints tracing back to it; * gradually approaching, but never reaching, perfect trust the longer it survives exposure to the world. A lot of bugs will make it past step 1--even through tests with 100% code coverage. Hopefully no one takes them as anything near proof of correctness.