code: def test_long(self):
      delta_1d = Timedelta(1, unit="D")
      delta_0d = Timedelta(0, unit="D")
      delta_1s = Timedelta(1, unit="s")
      delta_500ms = Timedelta(500, unit="ms")
  
      drepr = lambda x: x._repr_base(format="long")
      assert drepr(delta_1d) == "1 days 00:00:00"
      assert drepr(-delta_1d) == "-1 days +00:00:00"
      assert drepr(delta_0d) == "0 days 00:00:00"
      assert drepr(delta_1s) == "0 days 00:00:01"
      assert drepr(delta_500ms) == "0 days 00:00:00.500000"
      assert drepr(delta_1d + delta_1s) == "1 days 00:00:01"
      assert drepr(-delta_1d + delta_1s) == "-1 days +00:00:01"
      assert drepr(delta_1d + delta_500ms) == "1 days 00:00:00.500000"
      assert (
          drepr(-delta_1d + delta_500ms) == "-1 days +00:00:00.500000"
      )
  
file_path: pandas/pandas/tests/scalar/timedelta/test_formats.py
imports: import pytest
  from pandas import Timedelta
label_desc: Use image node_id 3 for calling the TestReprBase obj's underlying member method code with example usage: obj.test_long() without return types