> In the specification, it says what must happen when a file does not exist, what must happen when there's not enough memory, etc. Then you write the specified

> In the specification, it says what must happen when a file does not exist, what must happen when there's not enough memory, etc. Then you write the specified behavior into code. I've never, ever seen a specification which mentions file-not-found or out-of-memory errors. The "specifications" I get from my clients are more like (paraphrased): > Listen, adwn, I have all those files in a shitty, undocumented file format designed by another group in another building, could you please add an import button for them? Oh, and can I have it by Friday? Thanks, you're the best! I'm exaggerating only slightly. And then I go and try to make sense of what they need, and I implement error handling on top of it. Your specifications tell you exactly how to deal with file-not-found situations? You lucky bastard ;-)