@Test
public void testSessionDestroyed() {

  HttpSessionBindingListener bindingListener = mock(HttpSessionBindingListener.class);
  String dummy = "dummy";
  when(session.getAttribute("binding")).thenReturn(bindingListener);
  when(session.getAttribute("attribute")).thenReturn(dummy);
  when(session.getAttributeNamesWithValues()).thenReturn(Arrays.asList("binding", "attribute"));
  HttpSessionListener listener = mock(HttpSessionListener.class);
  descriptor.addHttpSessionListener(listener);
  notifier.sessionDestroyed(session, false);
  verify(bindingListener).valueUnbound(any(HttpSessionBindingEvent.class));
  verify(listener).sessionDestroyed(any(HttpSessionEvent.class));
  HttpSessionListener listener2 = mock(HttpSessionListener.class);
  HttpSessionBindingListener bindingListener2 = mock(HttpSessionBindingListener.class);
  when(session.getAttribute("binding2")).thenReturn(bindingListener2);
  when(session.getAttributeNamesWithValues()).thenReturn(Arrays.asList("binding", "attribute", "binding2"));
  descriptor.addHttpSessionListener(listener2);
  notifier.sessionDestroyed(session, false);
  verify(listener, times(2)).sessionDestroyed(any(HttpSessionEvent.class));
  verify(bindingListener, times(2)).valueUnbound(any(HttpSessionBindingEvent.class));
  verify(bindingListener2).valueUnbound(any(HttpSessionBindingEvent.class));
  verify(listener2).sessionDestroyed(any(HttpSessionEvent.class));
}