@Test
public void testDeltaVSulphurSO() {

    IAtom s = builder.newInstance(IAtom.class, "S");
    IAtom o = builder.newInstance(IAtom.class, "O");
    IBond b = builder.newInstance(IBond.class, s, o);
    b.setOrder(IBond.Order.DOUBLE);
    IAtomContainer m = builder.newInstance(IAtomContainer.class);
    m.addAtom(s);
    m.addAtom(o);
    m.addBond(b);
    double deltav = ChiIndexUtils.deltavSulphur(s, m);
    Assert.assertEquals(1.33, deltav, 0.01);
}