def test_del_attribute(self):
        """
        Test deleting an attribute of a Null object.

        @raise AssertionError: If the test fails.
        """
        try:
            del self.null.attr1
            del self.null.attr1.attr2.attr3
        except:
            raise AssertionError()

        Test deleting an attribute of a Null object.

        @raise AssertionError: If the test fails.
        
tests/behavioral_tests/test_null.py