def test_last_name(self):
        """
        Test the generation of Zulu last names.
        """
        # There's no gender-specific last name in Zulu.
        self.assertTrue(hasattr(YoNGProvider, "last_names_male"))
        self.assertTrue(hasattr(YoNGProvider, "last_names_female"))

        # All last names apply to all genders.
        self.assertTrue(hasattr(YoNGProvider, "last_names"))

        # General last name.
        name = self.fake.last_name()
        self.assertIsInstance(name, str)
        self.assertIn(name, YoNGProvider.last_names)

        # Females last name.
        name = self.fake.last_name_female()
        self.assertIsInstance(name, str)
        self.assertIn(name, YoNGProvider.last_names)

        # Male last name.
        name = self.fake.last_name_male()
        self.assertIsInstance(name, str)
        self.assertIn(name, YoNGProvider.last_names)

        Test the generation of Zulu last names.
        
tests/providers/test_person.py