code: def test_replace_string_dtype(self):
      # GH#40732, GH#44940
      ser = pd.Series(["one", "two", np.nan], dtype="string")
      res = ser.replace({"one": "1", "two": "2"})
      expected = pd.Series(["1", "2", np.nan], dtype="string")
      tm.assert_series_equal(res, expected)
  
      # GH#31644
      ser2 = pd.Series(["A", np.nan], dtype="string")
      res2 = ser2.replace("A", "B")
      expected2 = pd.Series(["B", np.nan], dtype="string")
      tm.assert_series_equal(res2, expected2)
  
      ser3 = pd.Series(["A", "B"], dtype="string")
      res3 = ser3.replace("A", pd.NA)
      expected3 = pd.Series([pd.NA, "B"], dtype="string")
      tm.assert_series_equal(res3, expected3)
  
imports: import re
  import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  import pandas
  import pandas._testing
  from pandas.core.arrays import IntervalArray
label_desc: Use image node_id 43 for calling the TestSeriesReplace obj's underlying member method code with example usage: obj.test_replace_string_dtype() without return types