old_contents: import unittest
  from classes.person import Person
  
  
  class PersonClassTest(unittest.TestCase):
      pass
      # def test_add_person_successfully(self):
      #     my_class_instance = Person()
      #     initial_person_count = len(my_class_instance.all_persons)
      #     staff_neil = my_class_instance.add_person("Neil Armstrong", "staff", "Y")
      #     self.assertTrue(staff_neil)
      #     new_person_count = len(my_class_instance.all_persons)
      #     self.assertEqual(new_person_count - initial_person_count, 1)
      #
      # def test_inputs_are_strings(self):
      #     with self.assertRaises(ValueError, msg='Only strings are allowed as input'):
      #         my_class_instance = Person()
      #         my_class_instance.add_person("Fellow", "Peter", 23)
      #
      # def test_wants_accommodation_default_is_N(self):
      #     my_class_instance = Person()
      #     my_class_instance.add_person("Fellow", "Peter", "Musonye")
      #     result = my_class_instance.all_persons
      #     self.assertEqual(result[0]['fellow']['peter musonye'], 'N', msg="The value of wants_accommodation should be N if it is not provided")
  
new_contents: import unittest
  from classes.person import Person
  
  
  class PersonClassTest(unittest.TestCase):
      def test_full_name_only_returns_strings(self):
          with self.assertRaises(ValueError, msg='Only strings are allowed as names'):
              my_class_instance = Person("staff", "Peter", "Musonye")
              my_class_instance.full_name()
  
subject: Add tests for class Person