code: def test_map_empty_integer_series_with_datetime_index():
      # GH 21245
      s = Series(
          [], index=date_range(start="2018-01-01", periods=0), dtype=int
      )
      result = s.map(lambda x: x)
      tm.assert_series_equal(result, s)
  
imports: from collections import Counter, defaultdict
  from decimal import Decimal
  import math
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, bdate_range, date_range, isna, timedelta_range
  import pandas._testing
label_desc: Use image node_id 8 for calling a global function with example usage: test_map_empty_integer_series_with_datetime_index() without return types