Hi Dave Again the short answer is yes, BUT . For someone like myself a retired Electrical Engineer its no problem, I still have some electrical test equipment. For others perhaps not so easy.
In your case, I am concerned that there is no switch on the ESC (you don’t say what make it is) I wonder if the ESC has a BEC fitted. Try your radio system with a Rx battery and servo only (no ESC) if that works connect the ESC, motor etc. and the Rx battery, see if that works. If it doesn’t work then I think you could have a duff ESC.
Cheers Tom