OH, so now you are agreeing with me, or not so much?
I did say there are no universal edibility tests. I will repeat that.
There is only one exception I would make.
If you eat it and live it is edible, if you die it isn't.
Other than that, nope.
Even peanuts, which we count as safe, will kill some people.
Maybe we should talk a bit more about personal testing to make sure you don't react to a food if you nave never tried it before?
(Especially since we are on such good terms now)
Edit: Careful not to hurt your hand there guy!

You're funny. Have a nice day, but don't forget to tip the natives. No really. They are another great (if not the greatest) resource of info concerning plants. See if you can get into a local college ethnobotany outing, you'll love it.