I've spent a week testing old seed for viability. Here's how I did it per instructions that are readily available on the web by Googling "seed germination test." Material needed: zip lock bags, paper towerls, scissors, spray bottle, masking tape, pen and a warm place to keep the seed.
Step 1: Cut a paper towel in half and wet it with a spray bottle.
Sprinkle some seeds across the middle of the towel.
Step 3: Fold it over and roll it up.
Mark the bag with masking tape.
Put the bags in a warm (70 degree) place. I used a metal container with a trouble light in it and covered it with a cushion.
Check in two or three days to see if they sprouted. If they did you are good to go.