code: def test_addsub_mismatched_reso(self, td):
      # need to cast to since td is out of bounds for ns, so
      #  so we would raise OverflowError without casting
      other = Timedelta(days=1).as_unit("us")
  
      # td is out of bounds for ns
      result = td + other
      assert result._creso == other._creso
      assert result.days == td.days + 1
  
      result = other + td
      assert result._creso == other._creso
      assert result.days == td.days + 1
  
      result = td - other
      assert result._creso == other._creso
      assert result.days == td.days - 1
  
      result = other - td
      assert result._creso == other._creso
      assert result.days == 1 - td.days
  
      other2 = Timedelta(500)
      msg = "Cannot cast 106752 days 00:00:00 to unit='ns' without overflow"
      with pytest.raises(OutOfBoundsTimedelta, match=msg):
          td + other2
      with pytest.raises(OutOfBoundsTimedelta, match=msg):
          other2 + td
      with pytest.raises(OutOfBoundsTimedelta, match=msg):
          td - other2
      with pytest.raises(OutOfBoundsTimedelta, match=msg):
          other2 - td
  
imports: from datetime import timedelta
  import sys
  from hypothesis import given, strategies
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas._libs.tslibs import NaT, iNaT
  from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
  from pandas.errors import OutOfBoundsTimedelta
  from pandas import Timedelta, to_timedelta
  import pandas._testing
label_desc: Use image node_id 16 for calling the TestNonNano obj's underlying member method code with example usage: obj.test_addsub_mismatched_reso(td) without return types