text: from django.test import TestCase
  from django.test import Client
  
  # Create your tests here.
  class AppTwoTestCase(TestCase):
      def test_message_response(self):
          c = Client()
          res1 = c.get('/app2/2')
          res2 = c.get('/app2/7')
          res3 = c.get('/app2/18')
          res4 = c.get('/app2/20')
          self.assertEqual(res1.content, b'Go To Bed')
          self.assertEqual(res2.content, b'Good Morning')
          self.assertEqual(res3.content, b'Good Afternoon')
          self.assertEqual(res4.content, b'Not the correct greeting')