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);
		partService.switchPerspective(perspectiveB);
		partService.switchPerspective(perspectiveA);
		ClientEditor editorA = (ClientEditor) partA.getObject();
		ClientEditor editorB = (ClientEditor) partB.getObject();
		editorA.focusCalled = false;
		editorB.focusCalled = false;
		partService.switchPerspective(perspectiveB);
		assertFalse(editorA.focusCalled);
		assertTrue(editorB.focusCalled);
		editorB.focusCalled = false;
		partService.switchPerspective(perspectiveA);
		assertTrue(editorA.focusCalled);
		assertFalse(editorB.focusCalled);
	}
	public void testSwitchPerspective07() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		MPart partD = BasicFactoryImpl.eINSTANCE.createPart();
		window.getSharedElements().add(partD);
		MPerspectiveStack perspectiveStack = AdvancedFactoryImpl.eINSTANCE
				.createPerspectiveStack();
		window.getChildren().add(perspectiveStack);
		window.setSelectedElement(perspectiveStack);
		MPerspective perspectiveA = AdvancedFactoryImpl.eINSTANCE