code: def test_round(self, datetime_series):
      datetime_series.index.name = "index_name"
      result = datetime_series.round(2)
      expected = Series(
          np.round(datetime_series.values, 2),
          index=datetime_series.index,
          name="ts",
      )
      tm.assert_series_equal(result, expected)
      assert result.name == datetime_series.name
  
file_path: pandas/pandas/tests/series/methods/test_round.py
imports: import numpy
  import pytest
  import pandas
  from pandas import Series
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestSeriesRound obj's underlying member method code with example usage: obj.test_round(datetime_series) without return types