old_contents: from unittest import TestCase
  
  
  class PersonTestCase(TestCase):
  
      def test_get_groups(self):
          pass
new_contents: from unittest import TestCase
  
  from address_book import Person
  
  
  class PersonTestCase(TestCase):
  
      def test_get_groups(self):
          pass
  
      def test_add_address(self):
          basic_address = ['Russian Federation, Kemerovo region, Kemerovo, Kirova street 23, apt. 42'],
          person = Person(
              'John',
              'Doe',
              basic_address,
              ['+79834772053'],
              ['john@gmail.com']
          )
          person.add_address('new address')
          self.assertEqual(
              person.addresses,
              basic_address + ['new address']
          )
  
      def test_add_phone(self):
          pass
  
      def test_add_email(self):
          pass
subject: Test the ability to add some address to the person