How can we identify that who are (or will be) good leaders?

How exactly? For example by conducting tests.

Leadership competence is an inexhaustible research theme. The results of these researches are endlessly suggesting us, what, when and how we should consider and measure when we are searching for good leaders.

Indexes, challenges, situations and many other indicators and measures exist and – taking all of them into account – it is hardly possible to believe that there is one perfect leadership profile.