Assume your aircraft has a steered nosewheel (with the rudder pedals) with a totally direct linkage (no springs etc) from the pedals to both the rudder and the nosewheel.
IMHO, the only way to test the rudder movement range is
during taxi, when the nosewheel is free to turn, and by gradually applying the pedals. Obviously you need to make sure there is enough room because the aircraft will turn left and right as you do it
It can be done without much or any forward motion but a huge pedal force is required, obviously - like turning the steering wheel in a car when not moving.
Would anybody here test for full rudder movement with a
rapid and full-travel left and right pedal depression, while moving forward slowly?