Yea, battery lights doesnt come up and never didBut whenever it failed the battery light on dash should turn ON; OP didn't say ever seen the battery light.
Alternator is easily tested: let engine idling, turn on headlights and if no battery light then it is still good.
I think light should come up when ur alternator is just dead, 0 charge to battery
I mean alternator can work but badly. so it doesnt show battery light?