It says the word 'test' in the post title, but if it helps I don't think you need to take it so literally.

This isn't necessarily "setting up" specific situations for people, but more like how people respond in normal everyday situations which you might consider to be either red flag or green flag behaviour.

For me, an example is littering. I'm not so sociopathic that I'd create some trash just to test someone, but if trash happens and they throw it on the ground, it's a bad personality indicator.