public void testModifyObservableList_FiresListChange() {
Bean bean = new Bean(new ArrayList());
IObservableList observable = BeansObservables.observeList(bean, "list");
ListChangeEventTracker tracker = ListChangeEventTracker.observe(observable);
Object element = new Object();
observable.add(element);
assertEquals(1, tracker.count);
assertDiff(tracker.event.diff, Collections.EMPTY_LIST, Collections.singletonList(element));
}
public void testSetBeanPropertyOutsideRealm_FiresEventInsideRealm() {
Bean bean = new Bean(Collections.EMPTY_LIST);
CurrentRealm realm = new CurrentRealm(true);
IObservableList observable = BeansObservables.observeList(realm, bean, "list");
ListChangeEventTracker tracker = ListChangeEventTracker.observe(observable);
realm.setCurrent(false);
bean.setList(Collections.singletonList("element"));
assertEquals(0, tracker.count);
realm.setCurrent(true);
assertEquals(1, tracker.count);
assertDiff(tracker.event.diff, Collections.EMPTY_LIST, Collections.singletonList("element"));
}
public void testSetListChangeEvent() throws Exception {
String oldElement = "old";
String newElement = "new";
list.add(oldElement);
ListChangeEventTracker listener = ListChangeEventTracker.observe(list);
assertEquals(0, listener.count);
list.set(0, newElement);
assertEquals(1, listener.count);
ListChangeEvent event = listener.event;
assertSame(list, event.getObservableList());
assertDiff(
event.diff, Collections.singletonList(oldElement), Collections.singletonList(newElement));
}
public void testSetBeanProperty_CorrectForNullOldAndNewValues() {
// The java bean spec allows the old and new values in a
// PropertyChangeEvent to be null, which indicates that an unknown
// change occured.
// This test ensures that JavaBeanObservableValue fires the correct
// value diff even if the bean implementor is lazy :-P
Bean bean = new AnnoyingBean();
bean.setList(Collections.singletonList("old"));
IObservableList observable = BeansObservables.observeList(new CurrentRealm(true), bean, "list");
ListChangeEventTracker tracker = ListChangeEventTracker.observe(observable);
bean.setList(Collections.singletonList("new"));
assertEquals(1, tracker.count);
List list = new ArrayList();
list.add("old");
tracker.event.diff.applyTo(list);
assertEquals(Collections.singletonList("new"), list);
}