@Test
public void testDefineLigand_ImplicitHydrogen() throws Exception {

    IAtomContainer molecule = smiles.parseSmiles("CC(C)C(C#N)(C(=C)C)");
    ILigand ligand = CIPTool.defineLigand(molecule, new VisitedAtoms(), 3, CIPTool.HYDROGEN);
    Assert.assertTrue(ligand instanceof ImplicitHydrogenLigand);
}