neutral safety switch test

Sure you can bench test it.....Trailbeast's test is right; I am sure he means you will get continuity (approx 0 ohms) in Park and Neutral (not Reverse...). Connect the ohmeter between the connection tab/pin on the NSS and the other end to a clean metal surface on the transmission case, or to the metal body of the switch.

For others, and if it a 3 pin NSS, and you also want to test the reverse light switch portion, then hook your ohmeter between the 2 outer pins on the NSS; you should get conintuity (approx 0 ohms) when in Reverse.