Tim Ferriss has started a firestorm with a post on "test-driving" friends by intentionally creating scenarios in which certain qualities would be revealed.
Would you want to be friends with someone who would intentionally conduct experiments with you?
Is it likely that the manipulator in the test-drive stage will cease to manipulate once the friend has passed the test?
3. Take them to a restaurant with good food but bad service. (Testing: how diplomatically they contend with and resolve incompetence, which is the default mode of the universe)
4. Invite them to an event or function and then profusely apologize when you realize you’ve forgotten your wallet. Offer to repay them later or treat them the next time out. (Testing: how they relate to money issues. Wonderful people sometimes turn into irrational monsters as soon as even a few dollars are involved. It drives me crazy to keep a running ledger of who owes whom for a few dollars here and there, especially in social settings. Repaying the favor is mandatory, but dwelling on differences of pennies is tiring.)