Bipolar personality disorder is too complex of a disease with too many variations to be diagnosed accurately with a simple test, according to Psychology Today. Also, it is impossible to provide an accurate diagnosis on oneself when dealing with mental disorders because there is no objective observer.
Diagnosis of bipolar disorder requires a doctor to perform multiple tests and gather information about the patient, according to Mayo Clinic. These tests can include a brain screening, consensual interviews with family and friends and mood charting. A doctor typically compares the patient's symptoms with information in the Diagnostic and Statistical Manual of Mental Disorders to make a diagnosis.