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
getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		partService.activate(partA);
		MPart partB = partService.showPart("partId", partState);
		
		assertNotNull("The part should have been rendered", partB.getContext());
	}
	public void testShowPart_Bug307747_CREATE() {
		testShowPart_Bug307747(PartState.CREATE);
	}
	public void testShowPart_Bug307747_VISIBLE() {
		testShowPart_Bug307747(PartState.VISIBLE);
	}
	public void testShowPart_Bug307747_ACTIVATE() {
		testShowPart_Bug307747(PartState.ACTIVATE);
	}
	/**
	 * Test to ensure that we can handle the showing of a part that's under a
	 * container with a selected element that's invalid.
	 */
	private void testShowPart_Bug328078(PartState partState) {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		MPartStack partStack = BasicFactoryImpl.eINSTANCE.createPartStack();
		window.getChildren().add(partStack);
		window.setSelectedElement(partStack);