ContainedListTest.java 文件源码

@Test
public void testRetainAll() {
    Parent parent = new Parent();
    Child child = new Child();
    parent.children().add(child);

    List<Object> retainables = new ArrayList<Object>();
    retainables.add(child);
    retainables.add("decoy");

    parent.children().getChangeSupport()
            .addPropertyChangeListener(new PropertyChangeListener() {

                @Override
                public void propertyChange(PropertyChangeEvent evt) {
                    assertTrue(evt instanceof IndexedPropertyChangeEvent);
                    IndexedPropertyChangeEvent iEvt = (IndexedPropertyChangeEvent) evt;
                    assertEquals(-1, iEvt.getIndex());
                    assertNull(iEvt.getNewValue());
                    assertNull(iEvt.getOldValue());
                    throw new RuntimeException("All is well!");
                }
            });
    try {
        boolean changed = parent.children().retainAll(retainables); // nop
        assertFalse(changed);
        retainables.remove(child);
        parent.children().retainAll(retainables); // child is removed =
                                                    // event!
        fail("Property change listener not notified");
    } catch (RuntimeException e) {
        assertEquals("All is well!", e.getMessage());
        assertEquals(0, parent.children().size());
    }
}