No sensible dealer would let someone test ride a bike, neither should a private sale.
Twice I have bought bikes from dealers, one new and one used - in both cases the dealer let me take the bike for a ride. They also suggested a route I should take to get the feel of it, highway, city, cornering etc. Even a BMW dealership let me road test a used bike, no hassles at all.
In all cases I had to show them my DL and give them a copy of my insurance card (given back at the end of the ride). If I couldn't test drive the ride, I won't be buying it.