Petronix testing?

Any way to test if my petronix unit is bad? I've never used on but got this off of a 318 I pulled to replace a motor in a different car. Tested all my connections and I know I am getting power to the distributor cap but I am not getting spark to my plugs. Thoughts? I think I'll drop in my dual point and see if it fires but if I could test my petronix prior to buying another that would be good.