def METHOD_NAME(self):
    person = Person()
    # Test prefix
    person.married = "yea"
    self.assertEqual("yeah", person.married)
    self.assertEqual(1, person.married_)
    person.married = "yes"
    self.assertEqual("yes", person.married)
    self.assertEqual(1, person.married_)
    person.married = "na"
    self.assertEqual("nah", person.married)
    self.assertEqual(0, person.married_)
    with self.assertRaises(TraitError):
        person.married = "unknown"
    # Test duplicate prefix
    with self.assertRaises(TraitError):
        person.married = "ye"