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
MPartStack partStackB = (MPartStack) windowB.getChildren().get(0);
		MPart partFrontB = (MPart) partStackB.getChildren().get(0);
		MPart partBackB = (MPart) partStackB.getChildren().get(1);
		partStackB.setSelectedElement(partFrontB);
		getEngine().createGui(windowA);
		getEngine().createGui(windowB);
		EPartService partServiceA = (EPartService) partFrontA.getContext().get(
				EPartService.class.getName());
		EPartService partServiceB = (EPartService) partFrontB.getContext().get(
				EPartService.class.getName());
		partServiceA.bringToTop(partBackB);
		assertEquals(partStackA.getSelectedElement(), partFrontA);
		assertEquals(partStackB.getSelectedElement(), partFrontB);
		partServiceB.bringToTop(partBackA);
		assertEquals(partStackA.getSelectedElement(), partFrontA);
		assertEquals(partStackB.getSelectedElement(), partFrontB);
		partServiceA.bringToTop(partBackA);
		assertEquals(partStackA.getSelectedElement(), partBackA);
		assertEquals(partStackB.getSelectedElement(), partFrontB);
		partServiceB.bringToTop(partBackB);
		assertEquals(partStackA.getSelectedElement(), partBackA);
		assertEquals(partStackB.getSelectedElement(), partBackB);
	}
	/**
	 * Test to ensure that calling bringToTop(MPart) will change the active part
	 * if the active part is obscured by the part that's being brought to top.
	 */
	public void testBringToTop_ActivationChanges01() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();