code: def test_vs_naive_delta(self, x_dtype, h, up, down):
      UpFIRDnCase(up, down, h, x_dtype)()
  
imports: import numpy
  from itertools import product
  from numpy.testing import assert_equal, assert_allclose
  from pytest import raises
  import pytest
  from scipy.signal import upfirdn, firwin
  from scipy.signal._upfirdn import _output_len, _upfirdn_modes
  from scipy.signal._upfirdn_apply import _pad_test
label_desc: Use image node_id 6 for calling the TestUpfirdn obj's underlying member method code with example usage: obj.test_vs_naive_delta(x_dtype, h, up, down) without return types