Without researching it the cap pictured is probably a polyester film with metal foil, there are two failure modes, open and short. Measure across the terminals with an ohm meter, if you get a low reading, ohms, tens of ohms the cap is shorted. If you get an overload (really an overrange) reading he cap is open. If the cap is good you will see a low resistance, kilo ohms then the reading will migrate to higher readings as the cap charges, eventually, depending on your meter and the size of the cap it may stabilize in the mega ohm area or overload, beyond the upper limit of the meter scale, this is the meter interpreting the charging current as a resistance. The right way to check, measure the capacitance with the cap function of a multimeter then check the cap insulation resistance with a Megger or similar high resistance meter which most people don't have.