def test_ref_get_with_invalid_election_id_non_existent_election_id(self):
        response = self.client.get(
            reverse('results-export'),
            { 'election': '69' },
            HTTP_REFERER=reverse('results'),
            follow=True
        )

        messages = list(response.context['messages'])
        self.assertEqual(
            messages[0].message,
            'You specified an ID for a non-existent election.'
        )
        self.assertRedirects(response, reverse('results'))
def _GetOutputStream(output_format, output_dir):
  assert output_format in _OUTPUT_FORMAT_CHOICES, 'Must specify a valid format.'
  assert output_format not in ('gtest', 'none'), (
      'Cannot set stream for \'gtest\' or \'none\' output formats.')

  if output_format == 'buildbot':
    return sys.stdout

  assert output_format in _OUTPUT_FILENAME_LOOKUP, (
      'No known filename for the \'%s\' output format' % output_format)
  output_file = os.path.join(output_dir, _OUTPUT_FILENAME_LOOKUP[output_format])
  open(output_file, 'a').close()  # Create file if it doesn't exist.
  return open(output_file, 'r+')