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
EPartService partService = (EPartService) windowContext
				.get(EPartService.class.getName());
		Object selectionA = new Object();
		Object selectionB = new Object();
		SelectionListener listener = new SelectionListener();
		windowService.addSelectionListener("partB", listener); 
		serviceA.setSelection(selectionA);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
		listener.reset();
		partService.activate(partB);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
		listener.reset();
		serviceB.setSelection(selectionB);
		assertEquals(partB, listener.getPart());
		assertEquals(selectionB, listener.getSelection());
		listener.reset();
		serviceA.setSelection(selectionB);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
		listener.reset();
		windowService.removeSelectionListener("partB", listener); 
		serviceB.setSelection(selectionA);
		assertNull(listener.getPart());
		assertNull(listener.getSelection());
	}
	public void testSelectionListener_Id2() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();