Define testing here. To check if it's actually SN with aquarium kit, couldn't hurt to just give it a try to ensure all your mental preparation of taking SN isn't for nothing only to find out that it wasn't the substance you hoped for.
If you talking about testing by drinking a tiny sample. I actually tried it myself, I wanted to know the taste and what it feels like. The taste wasn't too unbearable, just strong yucky salty like taste. I didn't feel too much difference, barely nausea, and more than anything, felt like I had lots of sodium or salt in my body like eating from a fast food burger chain. It certainly make me feel more at ease proceeding with the SN method after doing this