code: def test_to_csv_empty(self):
      df = DataFrame(index=np.arange(10, dtype=np.int64))
      result, expected = self._return_result_expected(df, 1000)
      tm.assert_frame_equal(result, expected, check_column_type=False)
  
imports: import csv
  from io import StringIO
  import os
  import numpy
  import pytest
  from pandas.errors import ParserError
  import pandas
  from pandas import DataFrame, Index, MultiIndex, NaT, Series, Timestamp, date_range, period_range, read_csv, to_datetime
  import pandas._testing
  import pandas.core.common
  from pandas.io.common import get_handle
label_desc: Use image node_id 15 for calling the TestDataFrameToCSV obj's underlying member method code with example usage: obj.test_to_csv_empty() without return types