text: from django.test import TestCase
  
  from .models import Person
  
  
  class PropertyTests(TestCase):
  
      @classmethod
      def setUpTestData(cls):
          cls.a = Person.objects.create(first_name='John', last_name='Lennon')
  
      def test_getter(self):
          self.assertEqual(self.a.full_name, 'John Lennon')
  
      def test_setter(self):
          # The "full_name" property hasn't provided a "set" method.
          with self.assertRaises(AttributeError):
              setattr(self.a, 'full_name', 'Paul McCartney')
  
          # And cannot be used to initialize the class.
          with self.assertRaisesMessage(TypeError, "Person() got an unexpected keyword argument 'full_name'"):
              Person(full_name='Paul McCartney')
  
          # But "full_name_2" has, and it can be used to initialize the class.
          a2 = Person(full_name_2='Paul McCartney')
          a2.save()
          self.assertEqual(a2.first_name, 'Paul')
  