Bug 299340 [CommonNavigator] Enable new CNF tests
Enable the contributed CNF tests, make minor test improvements.
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/LabelProviderTest.java
}
	public void testOverrideAdd() throws Exception {
		_contentService.bindExtensions(new String[] { TEST_CONTENT_OVERRIDDEN2,
				TEST_CONTENT_OVERRIDE2 }, false);
		_contentService.getActivationService()
				.activateExtensions(
						new String[] { TEST_CONTENT_OVERRIDDEN2,
								TEST_CONTENT_OVERRIDE2 }, true);
		refreshViewer();
		
		_viewer.expandToLevel(_project, 3);
		IFile f = _project.getFile("newfile");
		_viewer.add(_project, new Object[] { f });
		if (false)
			DisplayHelper.sleep(10000000);
		TreeItem[] rootItems = _viewer.getTree().getItems();
		checkItemsAll(rootItems, TestLabelProviderCyan.instance);
	}
	
	
	
	
	public void testUsingOverriddenLabelProvider() throws Exception {
		_contentService.bindExtensions(new String[] { TEST_CONTENT_OVERRIDDEN2,
				TEST_CONTENT_OVERRIDE2_BLANK }, true);
		_contentService.getActivationService().activateExtensions(
				new String[] { TEST_CONTENT_OVERRIDDEN2,
						TEST_CONTENT_OVERRIDE2_BLANK }, true);
		refreshViewer();
		TreeItem[] rootItems = _viewer.getTree().getItems();