How do you go about getting your makeup done at a department store make up counter?

I want to try a lancome before i buy it, but would they make me buy it to be able to try it...?How do you go about getting your makeup done at a department store make up counter?
well i live in dublin nd in the city center arnotts you can just go over nd pick the tester up nd put it on well gd luck xHow do you go about getting your makeup done at a department store make up counter?
go up to them and ask. After they're done say you want to go ask your mom's opinion or your friends. Leave