Bug 329482 Uninstantiated part may be rendered when closing another part in the same stack
1. Activate the 'Javadoc' view. 2. Activate the 'Package Explorer' view. 3. Shutdown. 4. Restart. 5. Ctrl+3 > Properties 6. Hide the 'Properties' view. 7. Now the 'Problems' view is the selected element. It should be the 'Javadoc' view.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
window.getChildren().add(partStack);
			for (int j = 0; j < partIds[i].length; j++) {
				MPart part = BasicFactoryImpl.eINSTANCE.createPart();
				part.setElementId(partIds[i][j]);
				partStack.getChildren().add(part);
			}
		}
		initialize(applicationContext, application);
		return application;
	}
	private void initialize(IEclipseContext applicationContext,
			MApplication application) {
		application.setContext(applicationContext);
		applicationContext.set(MApplication.class.getName(), application);
		E4Workbench.processHierarchy(application);
		((Notifier) application).eAdapters().add(
				new UIEventPublisher(applicationContext));
		applicationContext.set(ISaveHandler.class.getName(),
				new ISaveHandler() {
					public Save[] promptToSave(Collection<MPart> saveablePart) {
						Save[] ret = new Save[saveablePart.size()];
						Arrays.fill(ret, ISaveHandler.Save.YES);
						return ret;
					}
					public Save promptToSave(MPart saveablePart) {
						return ISaveHandler.Save.YES;
					}
				});
	}
	class PartListener implements IPartListener {