code: def test_to_csv_quoting(self):
      df = DataFrame(
          {
              "c_bool": [True, False],
              "c_float": [1.0, 3.2],
              "c_int": [42, np.nan],
              "c_string": ["a", "b,c"],
          }
      )
  
      expected_rows = [
          ",c_bool,c_float,c_int,c_string",
          "0,True,1.0,42.0,a",
          '1,False,3.2,,"b,c"',
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
  
      result = df.to_csv()
      assert result == expected
  
      result = df.to_csv(quoting=None)
      assert result == expected
  
      expected_rows = [
          ",c_bool,c_float,c_int,c_string",
          "0,True,1.0,42.0,a",
          '1,False,3.2,,"b,c"',
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
  
      result = df.to_csv(quoting=csv.QUOTE_MINIMAL)
      assert result == expected
  
      expected_rows = [
          '"","c_bool","c_float","c_int","c_string"',
          '"0","True","1.0","42.0","a"',
          '"1","False","3.2","","b,c"',
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
  
      result = df.to_csv(quoting=csv.QUOTE_ALL)
      assert result == expected
  
      # see gh-12922, gh-13259: make sure changes to
      # the formatters do not break this behaviour
      expected_rows = [
          '"","c_bool","c_float","c_int","c_string"',
          '0,True,1.0,42.0,"a"',
          '1,False,3.2,"","b,c"',
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
      result = df.to_csv(quoting=csv.QUOTE_NONNUMERIC)
      assert result == expected
  
      msg = "need to escape, but no escapechar set"
      with pytest.raises(csv.Error, match=msg):
          df.to_csv(quoting=csv.QUOTE_NONE)
  
      with pytest.raises(csv.Error, match=msg):
          df.to_csv(quoting=csv.QUOTE_NONE, escapechar=None)
  
      expected_rows = [
          ",c_bool,c_float,c_int,c_string",
          "0,True,1.0,42.0,a",
          "1,False,3.2,,b!,c",
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
      result = df.to_csv(quoting=csv.QUOTE_NONE, escapechar="!")
      assert result == expected
  
      expected_rows = [
          ",c_bool,c_ffloat,c_int,c_string",
          "0,True,1.0,42.0,a",
          "1,False,3.2,,bf,c",
      ]
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
      result = df.to_csv(quoting=csv.QUOTE_NONE, escapechar="f")
      assert result == expected
  
      # see gh-3503: quoting Windows line terminators
      # presents with encoding?
      text_rows = ["a,b,c", '1,"test \r\n",3']
      text = tm.convert_rows_list_to_csv_str(text_rows)
      df = read_csv(StringIO(text))
  
      buf = StringIO()
      df.to_csv(buf, encoding="utf-8", index=False)
      assert buf.getvalue() == text
  
      # xref gh-7791: make sure the quoting parameter is passed through
      # with multi-indexes
      df = DataFrame({"a": [1, 2], "b": [3, 4], "c": [5, 6]})
      df = df.set_index(["a", "b"])
  
      expected_rows = ['"a","b","c"', '"1","3","5"', '"2","4","6"']
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
      assert df.to_csv(quoting=csv.QUOTE_ALL) == expected
  
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 48 for calling the TestDataFrameToCSV obj's underlying member method code with example usage: obj.test_to_csv_quoting() without return types