esc failures

I have read many posts here about ESC errors and DJI Inspire 1 ESC/Motor issues. What I have not come across is a simple bench test one can do on removed ESC/Motor assemblies. Ie: I have a qty of ESC/Motor assemblies but want to know if they are serviceable before I go through the process of...

I am relatively new (about 9 months) into Remotely Piloted Aircraft (RPA) but I have been around aircraft in maintenance related matters since 1965 (Yes 51 years). I live in Perth, Western Australia. Purchased my Inspire 1 Pro a few weeks ago now. Had P3 since July 2015. The thought of losing...