code: def test_center_ljust_rjust_mixed_object():
      s = Series(
          [
              "a",
              np.nan,
              "b",
              True,
              datetime.today(),
              "c",
              "eee",
              None,
              1,
              2.0,
          ]
      )
  
      result = s.str.center(5)
      expected = Series(
          [
              "  a  ",
              np.nan,
              "  b  ",
              np.nan,
              np.nan,
              "  c  ",
              " eee ",
              None,
              np.nan,
              np.nan,
          ],
          dtype=object,
      )
      tm.assert_series_equal(result, expected)
  
      result = s.str.ljust(5)
      expected = Series(
          [
              "a    ",
              np.nan,
              "b    ",
              np.nan,
              np.nan,
              "c    ",
              "eee  ",
              None,
              np.nan,
              np.nan,
          ],
          dtype=object,
      )
      tm.assert_series_equal(result, expected)
  
      result = s.str.rjust(5)
      expected = Series(
          [
              "    a",
              np.nan,
              "    b",
              np.nan,
              np.nan,
              "    c",
              "  eee",
              None,
              np.nan,
              np.nan,
          ],
          dtype=object,
      )
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime
  import operator
  import numpy
  import pytest
  from pandas import Series, _testing
label_desc: Use image node_id 17 for calling a global function with example usage: test_center_ljust_rjust_mixed_object() without return types