Personality tests have been around for a while and are becoming more common. It's not about what type of person you are, but rather, if your personality is a good fit with the corporate culture. Different companies have different 'personalities.' Someone may be a great candidate based on qualifications and experience, but if they don't get along with co-workers and the work atmosphere, it is a net loss for the company.
A company I worked for in the late 80's started doing those tests. We all took the test and found out we would never have hired the staff we had. It was dropped shortly after.