How do you know if your AC compressor is broke?

Best way to check if the AC compressor is working or not is take off the compressor and take it in to get it tested. Auto Zone, O'Rily or some auto store and they don't charge you at all it's free. The only catch is you have get your lazy butt to do the job cuz there is no other easy way to test the compressor other then getting dirty and spending the time to do the job yourself. Unless you got the money to take it to the shop and get it looked at and pay for all that expenses.