I test drive every vehicle I buy, sometimes multiple times. I took a used 2004 Mustang GT Convertible home to test the convertible top, to my mechanic to give it a once-over, and then on the highway before going back to the dealer. LOL, it gave me so many problems over the next 2.5 years - $1500 warranty paid out over $6000!
I test drove a 2019 Limited back in December, but it had the regular 5.7 in it, and I wanted to try the eTorque out. Last week I took my truck out twice before purchasing - the first test drive was to go home and show the wife (she liked it) and the second one was the next day when I bought it, we went out to lunch in it and then a quick highway jaunt.
My 2015 F-150 that I just traded in, I took it on a test drive and tried to put a deposit on it so I could think on it for a day or two, but the dealer only took non-refundable deposits... I said NOPE and started to walk. The sales guy freaked out and said, "Sir, we can't sell a truck we physically don't have. Why don't we put a dealer tag on it and send you home overnight?" I bought that truck the next day.
My wife bought her 2015 Escape without a test drive, IIRC. She had driven another identically-equipped one (wrong color) and then the dealer flat-bedded hers to our location for her to buy.
-John