assertNotNull (laptop);
assertEquals("ctf.jdo.tc9x.Laptop", laptop.getClass().getName());
assertEquals(10, laptop.getId());
assertEquals("laptop 10", laptop.getName());
database.begin();
database.remove(database.load(Laptop.class, new Integer(10)));
database.remove(database.load(ProductDetail.class, new Integer(10)));
database.commit();
database.begin();