This is part of the standard testing procedure. Due to the randomness involved in these types of rides, and the incidents that have happened historically; its normal to run several hundred cycles with as many combinations of loading as possible.Still hasn't opened they were testing again today with no staff on the platform so not training. curiously some of the rafts appeared to have dummies loaded I'm different seating arrangements including one with only one side loaded. I have heard of possible concerns about the stability of the new rafts that might support those rumors.
This is something that will change by manufacturer. I recall mine blower from GG testing for only a couple days before opening, however some of the big manufacturers require hundreds, into thousands of cycles.