If you want the helicopter to fly, you need to test the motor with the helicopter rotor attached.
Helicopter motors draw amps , not ma , which is one reason that model helicopters use lipo batteries.
Model helicopters also have ESCs on the control board to power the motors.
You need to use the hardware in the helicopter to power the motors.
It may be possible to use the arduino to control the ESC in the helicopter to control the motor speeds.
If you know the AH capacity of the helicopter battery , and the average flight time , you can work out
the average motor current.