I'm not sure I understand which bit you want to test, but you should be able to come up with something. To check the starter and solenoid, sit the battery on the floor next to the engine and hook up the cables, then use a jumper to stimulate the solenoid. For the ignition switch and wiring, hook the battery up to the car and put some sort of dummy load (like an old headlight bulb) on the white/red wire that normally goes to the starter. Or, you can hook the starter up without having it mounted to the engine, by running a ground cable to the starter, and see if it spins.