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
assertTrue(part2.isToBeRendered());
		partService2.hidePart(part2);
		assertFalse(part1.isToBeRendered());
		assertFalse(part2.isToBeRendered());
	}
	private void testHidePart_Tagged(boolean tagged) {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		MPart part = BasicFactoryImpl.eINSTANCE.createPart();
		window.getChildren().add(part);
		window.setSelectedElement(part);
		if (tagged) {
			part.getTags().add(EPartService.REMOVE_ON_HIDE_TAG);
		}
		initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		partService.hidePart(part);
		assertFalse(part.isToBeRendered());
		assertEquals(tagged ? null : window, part.getParent());
	}
	public void testHidePart_Tagged_True() {
		testHidePart_Tagged(true);
	}
	public void testHidePart_Tagged_False() {
		testHidePart_Tagged(false);