Symptoms of a bad starter?

The car was undrivable, so I can’t take it anywhere to be tested with the battery still in the car. Do auto parts stores allow you to rent one and test it yourself?

I didn’t think it would take that much power from the battery to atleast engage the starter.

It’s already apart, so I’ll get the starter tested anyways. If that’s not it, I’ll check all the connections and work backwards from there.

Thanks for the help.