Various commentators have suggested that one of the reasons knowledge of the Jedi dies out so fast in Rogue One is that there were so few Jedi compared to the wider galactic population (I believe I've seen one post here that talks about a trillion people on Coruscant and around 100,000 Jedi in the galaxy). However it's also known in-universe that every child is tested for their midichlorian count. If true, then this suggests it was done covertly, otherwise the conversation would go something like:
"We're going to just check his Midichlorian count now, Mr Fett" "His what? You're doing what now? Hands off my Boba!" [screaming]
So is there any indication whether testing was done overtly or covertly?