AFAIK they did some “basic(?)” tests in the past.
Was told by a dev that MS contacted him because the tester could not find the switch to lower flaps.
What the tester did not know: The particular plane has no switch to lower flaps!
The flaps (and slats) position is controlled by the Flight Computer and if the landig gear is up or down.
So yes, the dev is the better solution to test the aircraft.
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