91 FC getting no spark
 

I just got my first RX-7 and it is getting no spark, I tested the spark plug wires but haven't tested the coils yet, how to I test the coils to first see if they are getting power as some wires in this car had been chewed through before I bought it, and second see if the coil is giving off spark? And if the coils are working what should I check after that, crank angle sensor maybe?