def METHOD_NAME():
     """
     Test the function to extract the lower and upper bound of the time series 
     data to be retrieved from the database
     """
     # Test if lower and upper bound are calculated correctly
     start = pd.Timestamp(
            isoparse('2019-09-05T09:00:00Z')).tz_convert('UTC').tz_localize(None)
     cfg = {
          'data_length': 2,
          'horizon': 2,
          'fc_start_timestamp': start,
          'frequency': dt.timedelta(hours=1),    
     }
     lowerbound_expected = '2019-09-05T07:00:00Z'
     upperbound_expected = '2019-09-05T10:00:00Z'
     assert get_ts_lower_upper_bound(cfg) == (lowerbound_expected, upperbound_expected)