class_docstr: Test Splif Fingerprint and Voxelizer.
code: def test_splif_shape(self):
      size = 8
      featurizer = dc.feat.SplifFingerprint(size=size)
      features = featurizer.featurize(self.complex_files)
      assert features.shape == (1, 3 * size)
  
file_path: deepchem/deepchem/feat/tests/test_splif_fingerprints.py
imports: import unittest
  import os
  import deepchem
label_desc: Use image node_id 2 for calling the TestSplifFingerprints obj's underlying member method code with example usage: obj.test_splif_shape() without return types