code: def test_na_rep_truncated(self):
      # https://github.com/pandas-dev/pandas/issues/31447
      result = pd.Series(range(8, 12)).to_csv(na_rep="-")
      expected = tm.convert_rows_list_to_csv_str(
          [",0", "0,8", "1,9", "2,10", "3,11"]
      )
      assert result == expected
  
      result = pd.Series([True, False]).to_csv(na_rep="nan")
      expected = tm.convert_rows_list_to_csv_str(
          [",0", "0,True", "1,False"]
      )
      assert result == expected
  
      result = pd.Series([1.1, 2.2]).to_csv(na_rep=".")
      expected = tm.convert_rows_list_to_csv_str(
          [",0", "0,1.1", "1,2.2"]
      )
      assert result == expected
  
imports: import io
  import os
  import sys
  from zipfile import ZipFile
  from _csv import Error
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, compat
  import pandas._testing
label_desc: Use image node_id 32 for calling the TestToCSV obj's underlying member method code with example usage: obj.test_na_rep_truncated() without return types