code: def test_add_pdnat(self, tda):
      result = tda + pd.NaT
      assert isinstance(result, TimedeltaArray)
      assert result._creso == tda._creso
      assert result.isna().all()
  
      result = pd.NaT + tda
      assert isinstance(result, TimedeltaArray)
      assert result._creso == tda._creso
      assert result.isna().all()
  
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Timedelta
  import pandas._testing
  from pandas.core.arrays import DatetimeArray, TimedeltaArray
label_desc: Use image node_id 11 for calling the TestNonNano obj's underlying member method code with example usage: obj.test_add_pdnat(tda) without return types