@Test
public void testN3() throws Exception {

    IAtomContainer mol = new AtomContainer();
    Atom atom = new Atom("N");
    atom.setImplicitHydrogenCount(3);
    mol.addAtom(atom);
    StructGenMatcher atm = new StructGenMatcher();
    IAtomType matched = atm.findMatchingAtomType(mol, atom);
    Assert.assertNotNull(matched);
    Assert.assertEquals("N", matched.getSymbol());
}