code: def test_delta_to_nanoseconds(obj, expected):
      result = delta_to_nanoseconds(obj)
      assert result == expected
  
file_path: pandas/pandas/tests/tslibs/test_timedeltas.py
imports: import re
  import numpy
  import pytest
  from pandas._libs.tslibs.timedeltas import array_to_timedelta64, delta_to_nanoseconds, ints_to_pytimedelta
  from pandas import Timedelta, offsets
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_delta_to_nanoseconds(obj, expected) without return types