code: def test_valid_input(self):
      assert_raises(
          ValueError, upfirdn, [1], [1], 1, 0
      )  # up or down < 1
      assert_raises(ValueError, upfirdn, [], [1], 1, 1)  # h.ndim != 1
      assert_raises(ValueError, upfirdn, [[1]], [1], 1, 1)
  
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 1 for calling the TestUpfirdn obj's underlying member method code with example usage: obj.test_valid_input() without return types