How to Use

First, to get a tester villager, you should use the command /function stewee:summon to get a spawn egg.
Use the spawn egg, and you can use suspicious stew on them, then everything else should work fine.

Some Warning

Note that I only made the related content for vanilla stews. If the effect is impossible to be in the stew, there might be some problems using it.
In theory, any kind of effects could be applied to a suspicious stew item, but like I'm kinda bored to make them. So if you want any other effects to be added, just contact me, and I might work on a format of it.