def METHOD_NAME(self):
    response = self.fetch("/first_handler")
    self.assertEqual(response.body, b"app1: first_handler: /first_handler")
    response = self.fetch("/second_handler")
    self.assertEqual(response.body, b"app2: second_handler: /second_handler")
    response = self.fetch("/first_handler_second_app")
    self.assertEqual(response.body, b"app2: first_handler: /first_handler")