def test_prune(self, mock_flush, mock_remove, mock_expired, mock_datetime, mock_index):
self.build_mock_index_and_datetime_now(mock_index, mock_datetime)
cache = Cache('test')
mock_flush.reset_mock()
mock_remove.reset_mock()
mock_expired.reset_mock()
mock_expired.return_value = True
cache.prune()
self.assertEqual(1, mock_flush.call_count)
self.assertEqual(3, mock_expired.call_count)
self.assertEqual(3, mock_remove.call_count)
