"if you are an alcoholic, and you pass a computer simulation provided by the state..." What do they do, make you get exactly as drunk as when you were pulled o

"if you are an alcoholic, and you pass a computer simulation provided by the state..." What do they do, make you get exactly as drunk as when you were pulled over to take the test? Where does the alcohol come from, the mini-bar under the judges desk, between the gun rack and stack of bribe envelopes?