Bug 252117 [DataBinding] ListBinding does not update from model to target in some cases
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/internal/databinding/beans/JavaBeanObservableArrayBasedSetTest.java
set.add(element);
		assertEquals(1, set.size());
		assertEquals(element, bean.getArray()[0]);
	}
	public void testAdd_SetChangeEvent() throws Exception {
		SetChangeEventTracker listener = SetChangeEventTracker.observe(set);
		assertEquals(0, listener.count);
		String element = "1";
		set.add(element);
		assertEquals(1, listener.count);
		SetChangeEvent event = listener.event;
		assertSame(set, event.getObservableSet());
		assertEquals(Collections.singleton(element), event.diff.getAdditions());
		assertEquals(Collections.EMPTY_SET, event.diff.getRemovals());
	}
	public void testAdd_FiresPropertyChangeEvent() throws Exception {
		assertPropertyChangeEvent(bean, new Runnable() {
			public void run() {
				set.add("0");
			}
		});
	}
	public void testRemove() throws Exception {
		String element = "1";
		set.add(element);
		assertEquals(1, bean.getArray().length);
		set.remove(element);
		assertEquals(0, bean.getArray().length);
	}
	public void testRemoveListChangeEvent() throws Exception {