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 = window.getContext().get(EPartService.class);
		partService.activate(partC);
		perspectiveStack.setSelectedElement(perspectiveB);
		perspectiveB.getContext().activate();
		partService.activate(partA);
		partService.activate(partB);
		perspectiveStack.setSelectedElement(perspectiveA);
		perspectiveA.getContext().activate();
		partService.activate(partC);
		partService.hidePart(partC);
		perspectiveStack.setSelectedElement(perspectiveB);
		perspectiveB.getContext().activate();
		partService.hidePart(partB);
		assertEquals(partC, partService.getActivePart());
	}
	/**
	 * Tests that a perspective will automatically select another part as the
	 * active part after the originally active part that's being shown across
	 * multiple perspectives has been removed.
	 */
	public void testHidePart_ActivationHistory15() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		MArea area = AdvancedFactoryImpl.eINSTANCE.createArea();
		window.getSharedElements().add(area);
		MPart sharedPart = BasicFactoryImpl.eINSTANCE.createPart();