@Test
public void testCompare_NullHybridization() throws Exception {

    SimpleAtomComparator comparator = new SimpleAtomComparator();
    IAtom a1 = builder.newInstance(IAtom.class, "C");
    IAtom a2 = builder.newInstance(IAtom.class, "C");
    Assert.assertEquals("Null hybridzation should be equals", 0, comparator.compare(a1, a2));
}