My sure test never tested AFCI’s from the outlet correctly from day one.
If you attempt to analyze the impedance on the ground circuit it will trip the AFCIs circuit if the AFCI is working properly.
As the approved testing method for AFCIs is from the button in the panel, that’s the way I inspect them. However, it comes in handy in a very large house to be able to trip it from the wall outlet.
The sure test provides an abundance of information about electrical circuits and power available which gives me a whole lot more insight on the power supply throughout the house. In this day and age of high copper prices, skimping on wire size is common and backstabbing outlets is prevalent. I have been finding a rash of excessive voltage drop in new construction down to 90 V AC!
This information may be outside the scope of inspection, however when you can explain to the general contractor why is electrical subcontractor can’t get full voltage across the house, they are impressed.
Excessively long runs.
Double taps on the neutral.
Improperly torqued electrical connections.
A crushed electrical conductor from improperly attached staple.
My sure test results has put a screeching halt to electrical contractors who show up on the inspection with six guns blazing! When you can provide the statistical information on the circuit and the electrical contractor can’t even evaluate the circuit, all discussion ends and they get to work on finding and correcting the issues.
Now as for testing GFCI circuits with the devices test button; I have tested countless GFCI’s with the test button that tested okay but don’t shut the power off to the device, won’t trip with an external tester, and once evaluated are found to be improperly wired. AFCI’s might test with their button, but GFCI’s lie!