public void testDisposeEventFilter() {

    final Display display = new Display();

    final StringBuffer log = new StringBuffer();

    Listener disposeListener = new Listener() {

      public void handleEvent( Event event ) {

        assertSame( display, event.display );

        assertNull( event.widget );

        log.append( "disposed" );

      }

    };

    display.addFilter( SWT.Dispose, disposeListener );

    display.dispose();

    assertEquals( "disposed", log.toString() );

  }