code: def test_insert_empty(self):
      # Corner case inserting with length zero doesn't raise IndexError
      # GH#33573 for freq preservation
      idx = timedelta_range("1 Day", periods=3)
      td = idx[0]
  
      result = idx[:0].insert(0, td)
      assert result.freq == "D"
  
      with pytest.raises(
          IndexError, match="loc must be an integer between"
      ):
          result = idx[:0].insert(1, td)
  
      with pytest.raises(
          IndexError, match="loc must be an integer between"
      ):
          result = idx[:0].insert(-1, td)
  
file_path: pandas/pandas/tests/indexes/timedeltas/methods/test_insert.py
imports: from datetime import timedelta
  import numpy
  import pytest
  from pandas._libs import lib
  import pandas
  from pandas import Index, Timedelta, TimedeltaIndex, timedelta_range
  import pandas._testing
label_desc: Use image node_id 7 for calling the TestTimedeltaIndexInsert obj's underlying member method code with example usage: obj.test_insert_empty() without return types