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(partService.isPartVisible(partA1));
		assertTrue(partService.isPartVisible(partB1));
		assertEquals(partA1, partService.getActivePart());
		assertEquals(shownPart, partB2);
		assertNotNull(
				"The part should have been created so it should have a context",
				partA2.getContext());
		assertNotNull(
				"The part should have been created so it should have a context",
				partB2.getContext());
	}
	public void testShowPart_Id_CREATE2() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		MPartDescriptor partDescriptor = org.eclipse.e4.ui.model.application.descriptor.basic.impl.BasicFactoryImpl.eINSTANCE
				.createPartDescriptor();
		partDescriptor.setElementId("partB");
		partDescriptor.setCategory("aCategory");
		application.getDescriptors().add(partDescriptor);
		MPartStack partStack = BasicFactoryImpl.eINSTANCE.createPartStack();
		partStack.setElementId("aCategory");
		window.getChildren().add(partStack);
		MPart partA = BasicFactoryImpl.eINSTANCE.createPart();
		partA.setElementId("partA");
		partStack.getChildren().add(partA);
		partStack.setSelectedElement(partA);
		window.setSelectedElement(partStack);
		application.setSelectedElement(window);