code: def test_rank_object_first(
      self,
      frame_or_series,
      na_option,
      ascending,
      expected,
      using_infer_string,
  ):
      obj = frame_or_series(["foo", "foo", None, "foo"])
      result = obj.rank(
          method="first", na_option=na_option, ascending=ascending
      )
      expected = frame_or_series(expected)
      if using_infer_string and isinstance(obj, Series):
          expected = expected.astype("uint64")
      tm.assert_equal(result, expected)
  
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas._libs.algos import Infinity, NegInfinity
  from pandas import DataFrame, Index, Series
  import pandas._testing
label_desc: Use image node_id 16 for calling the TestRank obj's underlying member method code with example usage: obj.test_rank_object_first(frame_or_series, na_option, ascending, expected, using_infer_string) without return types