code: def test_custom_businesshour_weekmask_and_holidays(
      weekmask, expected_time, mult
  ):
      # GH 23542
      holidays = ["2018-11-09"]
      bh = CustomBusinessHour(
          start="08:00",
          end="17:00",
          weekmask=weekmask,
          holidays=holidays,
      )
      result = Timestamp("2018-11-08 08:00") + mult * bh
      expected = Timestamp(expected_time)
      assert result == expected
  
imports: from __future__ import annotations
  from datetime import datetime, time
  import numpy
  import pytest
  from pandas._libs.tslibs import Timestamp
  from pandas._libs.tslibs.offsets import BusinessHour, CustomBusinessHour, Nano
  from pandas.tests.tseries.offsets.common import assert_offset_equal
  from pandas.tseries.holiday import USFederalHolidayCalendar
label_desc: Use image node_id 5 for calling a global function with example usage: test_custom_businesshour_weekmask_and_holidays(weekmask, expected_time, mult) without return types