@Test
public void testAllHeavyAtomsPlaced_IAtomContainer() {

    IAtomContainer ac = makeAlphaPinene();
    Assert.assertFalse(new AtomPlacer3D().allHeavyAtomsPlaced(ac));
    for (IAtom atom : ac.atoms()) {
        atom.setFlag(CDKConstants.ISPLACED, true);
    }
    Assert.assertTrue(new AtomPlacer3D().allHeavyAtomsPlaced(ac));
}