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
.get(IContributionFactory.class.getName());
			Object newEngine = contributionFactory.create(getEngineURI(),
					applicationContext);
			assertTrue(newEngine instanceof IPresentationEngine);
			applicationContext.set(IPresentationEngine.class.getName(),
					newEngine);
			engine = (IPresentationEngine) newEngine;
		}
		return engine;
	}
	public void testFindPart_PartInWindow() {
		MApplication application = createApplication("partId");
		MWindow window = application.getChildren().get(0);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		MPart part = partService.findPart("partId");
		assertNotNull(part);
		MPartStack partStack = (MPartStack) window.getChildren().get(0);
		assertEquals(partStack.getChildren().get(0), part);
		part = partService.findPart("invalidPartId");
		assertNull(part);
	}
	public void testFindPart_PartNotInWindow() {
		MApplication application = createApplication("partId");
		MWindow window = application.getChildren().get(0);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		MPart part = partService.findPart("invalidPartId");