The text "Mastering The Art of War" (Liu Ji & Zhuge Liang, Thomas Cleary translation) has some interesting advice for determining if someone is suitable for a leadership position:
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"Hard though it be to know people, there are ways.
First is to question them concerning right and wrong, to observe their ideas.
Second is to exhaust all their arguments, to see how they change.
Third is to consult with them about strategy, to see how perceptive they are.
Fourth is to announce that there is trouble, to see how brave they are.
Fifth is to get them drunk, to observe their nature.
Sixth is to present them with the prospect of gain, to see how modest they are.
Seventh is to give them a task to do within a specific time, to see how trustworthy they are."
> "Hard though it be to know people, there are ways.
First is to question them concerning right and wrong, to observe their ideas.
Second is to exhaust all their arguments, to see how they change.
Third is to consult with them about strategy, to see how perceptive they are.
Fourth is to announce that there is trouble, to see how brave they are.
Fifth is to get them drunk, to observe their nature.
Sixth is to present them with the prospect of gain, to see how modest they are.
Seventh is to give them a task to do within a specific time, to see how trustworthy they are."