Are Tests Really a Good Idea?

Some games are intended to tell you whether your personality is suited for a particular job. Are those really valid? And what happens, say, if your employer gives you one of these to play when you're already on the job and it turns out that you don't have the the right make up for the job that you have? Maybe it requires creativity, and the game says, you're a brick man. You're not creative at all. What are you doing in this job? Well, tests are one part of a larger picture of a decision making, or at least they should be treated as such. How much weight can you put into a game is a good question, or how much