Bug 287103 [CommonNavigator] contentServiceLabelProvider doesn't properly implement overrides
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/SorterTest.java
addedParent = items[_projectInd].getItem(1);
		assertEquals("BlueParent", addedParent.getText());
		addedParent = items[_projectInd].getItem(0);
		assertEquals("BlueAddedParent", addedParent.getText());
		
		
		
		assertEquals("BlueAddedChild1", addedParent.getItem(0).getText());
		assertEquals("BlueAddedFile1.txt", addedParent.getItem(1).getText());
		assertEquals("BlueAddedFile2.txt", addedParent.getItem(2).getText());
		assertEquals("BlueChild1", addedParent.getItem(3).getText());
	}
	public void testSorterResource() throws Exception {
		_contentService.bindExtensions(
				new String[] { TEST_CONTENT_SORTER_RESOURCE }, false);
		_contentService.getActivationService().activateExtensions(
				new String[] { TEST_CONTENT_SORTER_RESOURCE }, true);
		refreshViewer();
		INavigatorContentDescriptor desc = _contentService
				.getContentDescriptorById(TEST_CONTENT_SORTER_RESOURCE);
		TestSorterResource sorter = (TestSorterResource) _contentService
				.getSorterService().findSorter(desc, _p2, null, null);
		sorter._forward = false;
		IStructuredSelection sel;
		
		IContainer cont = (IContainer) _p2.members()[1];
		sel = new StructuredSelection(cont.members()[0]);
		_viewer.setSelection(sel);
		_viewer.setExpandedState(cont, true);