code: def test_replace_dst_border(self, unit):
      # Gh 7825
      t = Timestamp("2013-11-3", tz="America/Chicago").as_unit(unit)
      result = t.replace(hour=3)
      expected = Timestamp("2013-11-3 03:00:00", tz="America/Chicago")
      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 12 for calling the TestTimestampReplace obj's underlying member method code with example usage: obj.test_replace_dst_border(unit) without return types