Bug 343003 Selection changes for shared parts may not be propagated if they were not originally rendered in the model
The search algorithm currently only iterates through containers for parts. This will not work for parts that are represented by placeholders.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/ESelectionServiceTest.java
windowService.addSelectionListener(listener);
		serviceA.setSelection(selectionA);
		assertEquals(partA, listener.getPart());
		assertEquals(selectionA, listener.getSelection());
		listener.reset();
		serviceA.setSelection(selectionA);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
		listener.reset();
		partService.activate(partB);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
		listener.reset();
		serviceA.setSelection(selectionB);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
	}
	public void testBug314538() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		application.setSelectedElement(window);
		initialize(applicationContext, application);
		getEngine().createGui(window);
		IEclipseContext windowContext = window.getContext();
		ESelectionService windowService = (ESelectionService) windowContext
				.get(ESelectionService.class.getName());
		EPartService partService = (EPartService) windowContext
				.get(EPartService.class.getName());