class_docstr: Test RdkitGridFeaturizer class defined in rdkit_grid_featurizer module.
code: def setUp(self):
      current_dir = os.path.dirname(os.path.realpath(__file__))
      package_dir = os.path.dirname(os.path.dirname(current_dir))
      self.protein_file = os.path.join(
          package_dir, "dock", "tests", "1jld_protein.pdb"
      )
      self.ligand_file = os.path.join(
          package_dir, "dock", "tests", "1jld_ligand.sdf"
      )
  
file_path: deepchem/deepchem/feat/tests/test_rdkit_grid_features.py
imports: import os
  import unittest
  import numpy
  from deepchem.feat import RdkitGridFeaturizer
label_desc: Use image node_id 1 for calling the TestRdkitGridFeaturizer obj's underlying member method code with example usage: obj.setUp() without return types