code: def test_version(self):
      metadata = self.reader._get_metadata()
      self.assertEquals(
          metadata.version,
          BcolzMinuteBarMetadata.FORMAT_VERSION,
      )
  
imports: from datetime import timedelta
  import os
  from numpy import arange, array, int64, float64, full, nan, transpose, zeros
  from numpy.testing import assert_almost_equal, assert_array_equal
  from pandas import DataFrame, DatetimeIndex, Timestamp, Timedelta, NaT, date_range
  from zipline.data.bar_reader import NoDataForSid, NoDataOnDate
  from zipline.data.minute_bars import BcolzMinuteBarMetadata, BcolzMinuteBarWriter, BcolzMinuteBarReader, BcolzMinuteOverlappingData, US_EQUITIES_MINUTES_PER_DAY, BcolzMinuteWriterColumnMismatch, H5MinuteBarUpdateWriter, H5MinuteBarUpdateReader
  from zipline.testing.fixtures import WithAssetFinder, WithInstanceTmpDir, WithTradingCalendars, ZiplineTestCase
label_desc: Use image node_id 3 for calling the BcolzMinuteBarTestCase obj's underlying member method code with example usage: obj.test_version() without return types