code: def test_to_csv_unicodewriter_quoting(self):
      df = DataFrame({"A": [1, 2, 3], "B": ["foo", "bar", "baz"]})
  
      buf = StringIO()
      df.to_csv(
          buf,
          index=False,
          quoting=csv.QUOTE_NONNUMERIC,
          encoding="utf-8",
      )
  
      result = buf.getvalue()
      expected_rows = ['"A","B"', '1,"foo"', '2,"bar"', '3,"baz"']
      expected = tm.convert_rows_list_to_csv_str(expected_rows)
      assert result == 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 38 for calling the TestDataFrameToCSV obj's underlying member method code with example usage: obj.test_to_csv_unicodewriter_quoting() without return types