new_contents: from unittest import TestCase
  from unittest.mock import (
      Mock,
      patch,
  )
  
  import requests.exceptions
  
  from py_nist_beacon import NistRandomnessBeacon
  from py_nist_beacon.nist_randomness_beacon_value import (
      NistRandomnessBeaconValue
  )
  
  
  class TestNistRandomnessBeacon(TestCase):
      def test_get_last_record(self):
          last_record = NistRandomnessBeacon.get_last_record()
  
          self.assertIsInstance(last_record, NistRandomnessBeaconValue)
  
      def test_get_last_record_404(self):
          with patch('requests.get') as patched_requests:
              mock_response = Mock()
              mock_response.status_code = 404
              patched_requests.return_value = mock_response
  
              self.assertIsNone(NistRandomnessBeacon.get_last_record())
  
      def test_get_last_record_exceptions(self):
          with patch('requests.get') as patched_requests:
  
              exceptions_to_test = [
                  requests.exceptions.RequestException(),
                  requests.exceptions.ConnectionError(),
                  requests.exceptions.HTTPError(),
                  requests.exceptions.URLRequired(),
                  requests.exceptions.TooManyRedirects(),
                  requests.exceptions.Timeout(),
              ]
  
              for exception_test in exceptions_to_test:
                  patched_requests.side_effect = exception_test
                  self.assertIsNone(NistRandomnessBeacon.get_last_record())
  
subject: Test that get last record method