The only testing for rabies requires brain matter, and wouldn't be good for your kitty. Might be worth having the bat tested, but I'd leave that up to your vet. If you haven't tossed the bat carcass, might want to save it.

I'll echo another response about not being too worried if cat's shots are up to date.

IMO (and I'm a softy for animals) I don't think this is worth the big money that a trip to one of the emergency vets would cost you. They'll definitely order tests, but it's going to cost you a fair chunk of change, and you probably won't get same day results anyway.