[qwph]

Yeah, if you have more tests than actual code, that would seem to indicate something's gone wrong somewhere. And I'd agree that no amount of testing is going to turn an O(n) algorithm into an O(log n) one. There's no substitute for sitting down with a pen and paper and doing some old fashioned design sometimes.

I do think having a suite of repeatable test cases you can run against developing software is a useful thing to have, though. Not only can you test for correctness, but you can also run benchmarks against each modification to see if your performance or memory usage is going up or down.

It probably depends on what you're trying to do...