@Test(timeout = 1000)
public void testAcyclic() throws Exception {

    String smiles = "CCCCCCC";
    SmilesParser smilesParser = new SmilesParser(SilentChemObjectBuilder.getInstance());
    IAtomContainer molecule = smilesParser.parseSmiles(smiles);
    molecule = fbot.kekuliseAromaticRings(molecule);
    Assert.assertNotNull(molecule);
}