code: def test_replace_dst_fold(self, fold, tz, unit):
      # GH 25017
      d = datetime(2019, 10, 27, 2, 30)
      ts = Timestamp(d, tz=tz).as_unit(unit)
      result = ts.replace(hour=1, fold=fold)
      expected = Timestamp(datetime(2019, 10, 27, 1, 30)).tz_localize(
          tz, ambiguous=not fold
      )
      assert result == expected
      assert (
          result._creso
          == getattr(NpyDatetimeUnit, f"NPY_FR_{unit}").value
      )
  
imports: from datetime import datetime
  from dateutil.tz import gettz
  import numpy
  import pytest
  import pytz
  from pandas._libs.tslibs import OutOfBoundsDatetime, Timestamp, conversion
  from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
  import pandas.util._test_decorators
  import pandas._testing
label_desc: Use image node_id 13 for calling the TestTimestampReplace obj's underlying member method code with example usage: obj.test_replace_dst_fold(fold, tz, unit) without return types