[guardian5x]

It's easy to say 'write tests', but it's difficult to do so if you don't know what the actual requirements are.

People often think they are doing it 'properly' now by starting simple, but as they learn more and add functionality, they end up with the same complex mess they wanted to avoid.

[yakshaving_jgt]

Right, but not knowing what tests to write is feedback that your [yet to exist] tests are trying to tell you.