@Test
public void testGetPlacedHeavyAtom_IAtomContainer_IAtom_IAtom() {

    IAtomContainer ac = makeAlphaPinene();
    IAtom acplaced = new AtomPlacer3D().getPlacedHeavyAtom(ac, ac.getAtom(0), ac.getAtom(1));
    Assert.assertNull(acplaced);
    ac.getAtom(1).setFlag(CDKConstants.ISPLACED, true);
    acplaced = new AtomPlacer3D().getPlacedHeavyAtom(ac, ac.getAtom(0), ac.getAtom(2));
    Assert.assertEquals(ac.getAtom(1), acplaced);
    acplaced = new AtomPlacer3D().getPlacedHeavyAtom(ac, ac.getAtom(0), ac.getAtom(1));
    Assert.assertNull(acplaced);
}