Sorry Scarebus03 but there's just no way one can simulate airloads, g-loads, reduced pressure and reduced temperature on ground, let alone the combination of them. Also proper functioning of protection systems cannot be found by using conventional flight profile because it keeps you well clear of protection activation parameters. However, as A320 windshear and GPWS escape maneuvres are heavily relying on alpha protection, its proper operation has to be ascertained. IMHO there's proper way to do this: the height during the maneuvre has to be sufficient to facilitate recovery if things go pear-shaped. The crew has to calculate protection activation speeds for actual weight and CG and if speed goes below with protections remaining silent, recovery has to be initiated at once and aeroplane returned to maintenance.
It's true that airliners are not fighters, but still they can be inadvertently flown into the corners of the flight envelope and we need acceptance test flight to make sure there are no hidden surprises waiting there. But acceptance flights have to be done properly to minimize the risk involved.