>You should know what result you want before you even start writing the code. In theory, but IME about 50% of bugs end up being specification bugs at the high

>You should know what result you want before you even start writing the code. In theory, but IME about 50% of bugs end up being specification bugs at the high level anyway. Once you drill down and start writing unit tests on lower levels to imitate higher level APIs that % only goes up.