@Test
public void testBezene() {

    Ring benzene = new Ring(6, "C");
    Iterator<IBond> bonds = benzene.bonds().iterator();
    while (bonds.hasNext())
        bonds.next().setFlag(CDKConstants.ISAROMATIC, true);
    boolean success = DeAromatizationTool.deAromatize(benzene);
    Assert.assertTrue(success);
    double bondOrderSum = AtomContainerManipulator.getSingleBondEquivalentSum(benzene);
    Assert.assertEquals(9.0, bondOrderSum, 0.00001);
}