@Test
public void testGetAtomContainerCount() throws Exception {

    SmilesParser sp = new SmilesParser(DefaultChemObjectBuilder.getInstance());
    IAtomContainer molecule = sp.parseSmiles("c1ccccc1");
    IRingSet ringSet = new SSSRFinder(molecule).findSSSR();
    Assert.assertEquals(1, ringSet.getAtomContainerCount());
}