I voted you up, but this is tough. I write tests at work when they'll help me, but nobody else maintains or creates them. Except for the tests that the boss created and insists that everyone run.

I haven't pushed terribly hard for my tests, but it's pretty obvious that I wouldn't get any traction if I did, and I'm picking my battles.

So while I agree with "write your tests anyhow", it's a lot harder than it sounds, and a lot less successful than a proper testing strategy that's embraced by the team.