How do I check an ignition coil on a 1993 Corolla

Take the wire off the spark plug then remove the spark plug, put the wire back on the plug and lay it down on something metal .Have someone start the car and look at the sparkplug gap to see if it is sparking. Use a new sparkplug to be sure its a good plug and do this when its kind of dark out side so its easy to see the spark.If it does not have a spark,the coil is worn.
I hope this helps you.