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
area.setSelectedElement(partB);
		MPart partC = BasicFactoryImpl.eINSTANCE.createPart();
		area.getChildren().add(partC);
		initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = window.getContext().get(EPartService.class);
		partService.activate(partA);
		partService.activate(partB);
		partService.activate(partC);
		partService.activate(partA);
		partService.activate(partB);
		partService.hidePart(partB);
		assertEquals(partC, partService.getActivePart());
	}
	public void testHidePart_ActivationHistory_Bug327952_04() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		MPart partA = BasicFactoryImpl.eINSTANCE.createPart();
		window.getChildren().add(partA);
		window.setSelectedElement(partA);
		MWindow detachedWindow = BasicFactoryImpl.eINSTANCE.createWindow();
		window.getWindows().add(detachedWindow);
		MArea area = AdvancedFactoryImpl.eINSTANCE.createArea();
		detachedWindow.getChildren().add(area);
		detachedWindow.setSelectedElement(area);
		MPart partB = BasicFactoryImpl.eINSTANCE.createPart();
		area.getChildren().add(partB);