public void testCloning() {
        DateTitle t1 = new DateTitle();
        DateTitle t2 = null;
        try {
            t2 = (DateTitle) t1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("DateTitleTests.testCloning: failed to clone.");
        }
        assertTrue(t1 != t2);
        assertTrue(t1.getClass() == t2.getClass());
        assertTrue(t1.equals(t2));