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
initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = window.getContext().get(EPartService.class);
		MPlaceholder placeholder = partService.createSharedPart("partId", true);
		MPart sharedPart = (MPart) placeholder.getRef();
		sharedPart.setCurSharedRef(placeholder);
		placeholder.setToBeRendered(false);
		sharedPart.setToBeRendered(false);
		perspective.getChildren().add(placeholder);
		partService.showPart(sharedPart, partState);
		assertNotNull(perspective.getSelectedElement());
		assertEquals(placeholder, perspective.getSelectedElement());
	}
	public void testShowPart_Bug322368_Placeholder_ACTIVATE() {
		testShowPart_Bug322368_Placeholder(PartState.ACTIVATE);
	}
	public void testShowPart_Bug322368_Placeholder_VISIBLE() {
		testShowPart_Bug322368_Placeholder(PartState.VISIBLE);
	}
	public void testShowPart_Bug322368_Placeholder_CREATE() {
		testShowPart_Bug322368_Placeholder(PartState.CREATE);
	}
	public void testShowPart_Bug322403_A() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MPartDescriptor partDescriptor = org.eclipse.e4.ui.model.application.descriptor.basic.impl.BasicFactoryImpl.eINSTANCE
				.createPartDescriptor();
		partDescriptor.setElementId("partId");
		partDescriptor.setAllowMultiple(true);
		application.getDescriptors().add(partDescriptor);