Stop in for a cup of coffee

When you apply a resistance check on a capacitor, the needle should swing over. Analog meter with a power source like AA or 9V battery.
Otherwise you need a meter that does capacitance.

Typically its power source to coil - in your case maybe coil negative if was for a positve ground application, then to the points. When the points close, current should flow through the coil primary windings to ground.