code: def test_asfreq(self, datetime_frame):
      offset_monthly = datetime_frame.asfreq(offsets.BMonthEnd())
      rule_monthly = datetime_frame.asfreq("BME")
  
      tm.assert_frame_equal(offset_monthly, rule_monthly)
  
      rule_monthly.asfreq("B", method="pad")
      # TODO: actually check that this worked.
  
      # don't forget!
      rule_monthly.asfreq("B", method="pad")
  
imports: from datetime import datetime
  import numpy
  import pytest
  from pandas._libs.tslibs.offsets import MonthEnd
  from pandas import DataFrame, DatetimeIndex, Series, date_range, period_range, to_datetime
  import pandas._testing
  from pandas.tseries import offsets
label_desc: Use image node_id 9 for calling the TestAsFreq obj's underlying member method code with example usage: obj.test_asfreq(datetime_frame) without return types