@Test
	public void testUpdateSimple() throws Exception
	{
		PersistenceManager persist = new PersistenceManager(driver, database, login, password);
		persist.dropTable(Object.class);

		// create a simple object
		SimpleObject object = new SimpleObject();
		object.setAge(500L);
		// save it
		persist.saveObject(object);
		// make sure only one object exists
		List<SimpleObject> allObjects = persist.getObjects(new SimpleObject());
		assertEquals(1, allObjects.size());
		// change the object
		object.setAge(1000L);
		// save the object again
		persist.saveObject(object);
		// make sure there's still only one object
		allObjects = persist.getObjects(new SimpleObject());
		assertEquals(1, allObjects.size());
		// re-open the database connection
		persist.close();
		persist = new PersistenceManager(driver, database, login, password);
		// make sure the object has been changed
		allObjects = persist.getObjects(new SimpleObject());
		assertEquals(1, allObjects.size());
		SimpleObject first = allObjects.get(0);
		assertTrue(first.getAge().equals(1000L));

		// add another object
		SimpleObject nuObject = new SimpleObject();
		nuObject.setAge(1L);
		persist.saveObject(nuObject);

		// update the new object
		nuObject.setAge(2L);

		// make sure only one object has been modified
		allObjects = persist.getObjects(new SimpleObject());
		assertEquals(2, allObjects.size());
		first = allObjects.get(0);
		SimpleObject second = allObjects.get(1);
		assertTrue((first.getAge() == 2L && second.getAge() == 1000L)
				|| (first.getAge() == 1000L && second.getAge() == 2L));

		persist.close();

	}