code: def _test_write_ohlcv_content(self):
      result = self.bcolz_daily_bar_ctable
      for column in OHLCV:
          idx = 0
          data = result[column][:]
          multiplier = 1 if column == "volume" else 1000
          for asset_id in self.assets:
              for date in self.dates_for_asset(asset_id):
                  self.assertEqual(
                      expected_bar_value(asset_id, date, column)
                      * multiplier,
                      data[idx],
                  )
                  idx += 1
          self.assertEqual(idx, len(data))
  
imports: from sys import maxsize
  import re
  from nose_parameterized import parameterized
  from numpy import arange, datetime64, nan
  from numpy.testing import assert_array_equal
  from pandas import DataFrame, Timestamp
  from pandas.util.testing import assert_index_equal
  from catalyst.data.us_equity_pricing import BcolzDailyBarReader, BcolzDailyBarWriter, NoDataBeforeDate, NoDataAfterDate
  from catalyst.pipeline.loaders.synthetic import OHLCV, asset_start, asset_end, expected_bar_value, expected_bar_values_2d, make_bar_data
  from catalyst.testing import seconds_to_timestamp
  from catalyst.testing.fixtures import WithAssetFinder, WithBcolzEquityDailyBarReader, WithTmpDir, WithTradingCalendars, CatalystTestCase
  from catalyst.utils.calendars import get_calendar
label_desc: Use image node_id 9 for calling the BcolzDailyBarTestCase obj's underlying member method code with example usage: obj._test_write_ohlcv_content() without return types