A while back I wrote about how I monkey-patch modules for testing , but I didn't really write about why I preferto do my testing this way instead of, say, using dependency injection in the code I'mgoing to test.

My ultimate reason for doing it this way is that I would rather haveclean code and ugly tests than dirty code and cleaner tests. 'Testable'code that has everything it talks to injected into it as a parameteris generally ugly; specifically, it is

One of the things that turns plain applications into social applicationsis the ability to get feedback from other people ,the ability to know that other people are appreciating your stuff. Ithink it follows as a corollary that if you want to build a popularsocial application, getting the feedback right matters a lot; the morefeedback people get, the more likely they are to continue using yoursocial application.

To be specific for a bit, let's talk about Flickr (partly because I haveexperience with it as a