@Test public void testAddData() { for (long i = 1; i <= 4; i++) { Item item = new Item(); item.setId(i); item.setProperty1(i + "-p1"); item.setProperty2(i + "-p2"); item = dao.add(item); Assert.assertNotNull(item); Assert.assertEquals(i, dao.getAll().size()); } Item item1 = dao.find(1L); Assert.assertNotNull(item1); Assert.assertEquals(1L, item1.getId()); }