Best way to test a relay! 2003 Toyota Camry with no A/C. Compressor won't turn on.

2003 Toyota Camry 2.4L with no A/C. In this video I go through a really quick and simple compressor operation check but mainly I wanted to show my favorite method for testing relays!
Previously I made a short on how to spot a bad relay with a visual inspection
• How to tell if a relay...
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[@mikejmardis]

You are just learning this?
Won’t help you if it has a relay circuit module.

[@eurbanautotech]

@mikejmardis Yup. I never bothered swapping relays or anything like that before as no-op problems usually aren't caused by relays. Instead I'd usually just do my testing directly at the component as it has a higher chance of failure. Exception to that is I've been finding a lot of A/C compressor clutch relays that are faulty. Especially among Toyotas and Hondas. Getting quite common on the newer solid state relays.
I'm not sure what you mean by "relay circuit module"? Are you just talking about an integrated relay directly on a circuit board..?