code: def test_preprocess_smoke():
      """
      Tests that the preprocessing functionality does not crash.
      """
      # Act.
      (
          node_laplacian,
          edge_laplacian,
          incidence,
      ) = CensNetConv.preprocess(A)
  
file_path: spektral/tests/test_layers/convolutional/test_censnet_conv.py
imports: import enum
  import networkx
  import numpy
  import pytest
  from core import A, F, S, batch_size
  from tensorflow.keras import Input, Model
  from spektral.layers import CensNetConv
label_desc: Use image node_id 5 for calling a global function with example usage: test_preprocess_smoke() without return types