code: def test_environment():
      mol = Chem.MolFromSmiles("C")
      mol = convert_radical_electrons_to_hydrogens(mol)
  
      assert steric_strain_filter(mol)
      assert zinc_molecule_filter(mol)
      assert check_valency(mol)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_environment() without return types