code: def test_apply_av_length_error(self):
      a = [
          np.array([1.0, 2.0, 1.0, 2.0]),
          np.array([0.0, 0.0, 0.0, 0.0]),
      ]
      av = np.array([2.0, 1.0, 2.0])
  
      with pytest.raises(ValueError):
          apply_av(a, av)
  
imports: from matrixprofile.utils import *
  import numpy
  import pytest
label_desc: Use image node_id 16 for calling the TestClass obj's underlying member method code with example usage: obj.test_apply_av_length_error() without return types