I know that JBP offers this for paying customers to answer a long list of questions in order to find out what your personality traits are . I haven’t done the JBP version so I won’t talk about that.
But I found this online the other day, which is not the generic type tests that you find online. This is a professional and serious site created by two people with PhD in psychology. It’s 100 questions and takes about 12-15 minutes, afterwards you can both see and download the results.
If you still would like to do the JBP version aka UnderstandMyself.com, I recommend using the promo code H3H3 to get the reduced price.
This test is great to do before doing the self authoring program, it helps to understand what your strengths and weaknesses are.