public void testAddPropertyChangeListener_PropertyChangeListener_Normal() {
Object src = new Object();
PropertyChangeSupport sup = new PropertyChangeSupport(src);
PropertyChangeListener l1 = new MockPropertyChangeListener();
PropertyChangeListener l2 = new MockPropertyChangeListener();
PropertyChangeListener l3 = new PropertyChangeListenerProxy("myProp",
l2);
PropertyChangeListener l4 = new PropertyChangeListenerProxy("myProp",
l3);
sup.addPropertyChangeListener(l1);
assertEquals(1, sup.getPropertyChangeListeners().length);