Sadly, it would appear that those tests were all that will ever be given to him. The series probably doesn't have the time to show any more tests, and it would be simply a repetitve episode to show us what new tests he would be given. In order to be a good leader, he will have to gain experience first. Mind you, experience isn't strictly necessary for a good leader; Harry S. Truman became president after he was a minor state senator from Missouri. First, he was made vice president (normally an unimportant role), and when Franklin Delano Roosevelt died, Truman became president with no experience in any major executive role. That's right, he went from a moderately important state politician in a moderately important state to being the leader of the free world during the largest war the world had ever seen in under a year, and he was a good leader.