Power but not clicking over

Hello, I'm Danny.

Yes, your starter motor can be tested however, it must be removed from the vehicle and taken to your local auto parts store for testing.They put it on a machine that will test it.It is always free of charge to test. Here is a tutorial showing how to remove/replace the starter:

https://www.2carpros.com/articles/how-to-replace-a-starter-motor

Hope this helps and feel free to ask questions if needed.Thanks for using 2CarPros.
Danny-