code: def test_round(self, freq, s1, s2):
      s1 = Timedelta(s1)
      s2 = Timedelta(s2)
      t1 = Timedelta("1 days 02:34:56.789123456")
      t2 = Timedelta("-1 days 02:34:56.789123456")
  
      r1 = t1.round(freq)
      assert r1 == s1
      r2 = t2.round(freq)
      assert r2 == s2
  
file_path: pandas/pandas/tests/scalar/timedelta/methods/test_round.py
imports: from hypothesis import given, strategies
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas._libs.tslibs import iNaT
  from pandas.errors import OutOfBoundsTimedelta
  from pandas import Timedelta
label_desc: Use image node_id 1 for calling the TestTimedeltaRound obj's underlying member method code with example usage: obj.test_round(freq, s1, s2) without return types