code: def test_tdi_round_invalid(self, freq, msg):
      t1 = timedelta_range("1 days", periods=3, freq="1 min 2 s 3 us")
  
      with pytest.raises(ValueError, match=msg):
          t1.round(freq)
      with pytest.raises(ValueError, match=msg):
          # Same test for TimedeltaArray
          t1._data.round(freq)
  
file_path: pandas/pandas/tests/indexes/timedeltas/test_scalar_compat.py
imports: import numpy
  import pytest
  from pandas._libs.tslibs.offsets import INVALID_FREQ_ERR_MSG
  from pandas import Index, Series, Timedelta, TimedeltaIndex, timedelta_range
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestVectorizedTimedelta obj's underlying member method code with example usage: obj.test_tdi_round_invalid(freq, msg) without return types