assertFalse(check.check()); // Unregister
assertEquals(2, registrations);
assertEquals(2, unregistrations);
assertEquals(1, updates);
assertEquals(5, total);
assertTrue(check.check()); // Register
assertEquals(2, registrations);
assertEquals(2, unregistrations);
assertEquals(1, updates);
assertEquals(5, total);
props.clear(); props.put("change3", "3"); ps.addProperties(props); // Modify