@Test
public void testUpdate_checkPageStatus() throws Exception {
RabbitView view = new RabbitView();
view.createPartControl(shell);
IPage visiblePage = null;
for (PageDescriptor des : RabbitUI.getDefault().loadRootPages()) {
visiblePage = des.getPage();
display(view, des.getPage());
}
// All pages have been displayed before, so they should all be updated: