code: def test_astype_str_map(self, dtype, data, using_infer_string):
      # see GH#4405
      series = Series(data)
      result = series.astype(dtype)
      expected = series.map(str)
      if using_infer_string:
          expected = expected.astype(object)
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime, timedelta
  from importlib import reload
  import string
  import sys
  import numpy
  import pytest
  from pandas._libs.tslibs import iNaT
  import pandas.util._test_decorators
  from pandas import NA, Categorical, CategoricalDtype, DatetimeTZDtype, Index, Interval, NaT, Series, Timedelta, Timestamp, cut, date_range, to_datetime
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestAstype obj's underlying member method code with example usage: obj.test_astype_str_map(dtype, data, using_infer_string) without return types