public void testAddChangeEventListener() throws CoreException {
CasEditorPlugin.destroyNlpModelForTesting();
final Set<IResource> addedElements = new HashSet<IResource>();
INlpModelChangeListener listener = new INlpModelChangeListener() {
public void refresh(INlpElement element) {
}
public void resourceChanged(INlpElementDelta delta) {
if (delta.getKind().equals(Kind.ADDED) && delta.getNlpElement() != null) {