How to test a A2119 Mac adapter?

Hello,

My A2119 adapter (https://support.apple.com/en-us/HT207806) fell in water, now dry it doesn’t show external traces of corrosion but I would like to test it with a multimeter before plugging it safely into my laptop.

I haven’t found schematics for this device and I am not sure which pins to test…

Could anyone help here ?

Thank you !