@Test
public void testCalculateOverlapsAndReduce() throws Exception {

    IChemObjectBuilder builder = DefaultChemObjectBuilder.getInstance();
    SmilesParser sp = new SmilesParser(builder);
    IAtomContainer Molecule1 = sp.parseSmiles("O1C=CC=C1");
    IAtomContainer Molecule2 = sp.parseSmiles("C1CCCC1");
    CDKRMapHandler instance = new CDKRMapHandler();
    instance.calculateOverlapsAndReduce(Molecule1, Molecule2, true);
    Assert.assertNotNull(FinalMappings.getInstance().getSize());
}