I noticed a curious thing.
Reading and watching other really good material on how to make your designs easily testable (and other topics that overlapped with this goal) kept coming back to Miško Hevery.
They would say "There's great reasons for doing it this way, this isn't the place to talk about why if you don't know, go watch or read Miško Hevery."
I feel like they were right.
Critics mostly say his stuff is obvious, but his target audience is beginners and intermediate designers, as well as those who have been doing things wrong from a testability (and probably reusability and maintenance perspective to for that matter) for so long that they have stopped thinking about it.
I gave someone a link somewhere to one piece, and one can link-surf from there, but as I was following them and closing them I decided to place them all here, because it is, in my opinion, such a good place to pick up a lot of good insight and good habits.
So here is a chronological dump of links to his site, there's many more pages of good stuff there, but these are the ones I left open:
http://misko.hevery.com/2008/07/24/how-to-write-3v1l-untestable-code/
http://misko.hevery.com/2008/07/30/top-10-things-which-make-your-code-hard-to-test/
http://misko.hevery.com/2008/08/21/where-have-all-the-singletons-gone/
http://misko.hevery.com/2008/08/25/root-cause-of-singletons/
http://misko.hevery.com/2008/08/29/my-main-method-is-better-than-yours/
http://misko.hevery.com/2008/09/10/where-have-all-the-new-operators-gone/
http://misko.hevery.com/2008/09/24/application-wiring-on-auto-pilot/
http://misko.hevery.com/2008/09/30/to-new-or-not-to-new/
http://misko.hevery.com/2008/10/21/dependency-injection-myth-reference-passing/
http://misko.hevery.com/2008/10/27/pass-around-ginormous-context-objects/
http://misko.hevery.com/2008/11/17/unified-theory-of-bugs/
http://misko.hevery.com/2008/12/15/static-methods-are-death-to-testability/
http://misko.hevery.com/2009/07/31/how-to-think-about-oo/
http://misko.hevery.com/2009/01/14/when-to-use-dependency-injection/
Maybe these are all summed up here? I am not sure yet:
http://misko.hevery.com/code-reviewers-guide/
I have spent a LOT of time working with code that violated most of these things. A LOT.
The results could be described in the words of the late Warren Zevon "Ain't That Pretty at All"!
