Well, I think a "lamp tester" would do.
Did you test/inspected it at the lamp tester? or did you tested to see if is working (as it should)?
Yes, I did, it´s okay.
No, I didn´t. I´ll pay it and take it home just the same, no problem.
Anyway, you have thrown me a curve, I am not 100% sure of it.
So, let´s wait for more comments.