@Test
 public void validSlotTest() {
   Assert.assertTrue(factory.isValidJSFSlot("main"));
   Assert.assertFalse(factory.isValidJSFSlot("1.2"));
   Assert.assertTrue(factory.isValidJSFSlot("myfaces"));
   Assert.assertTrue(factory.isValidJSFSlot("myfaces2"));
   Assert.assertTrue(factory.isValidJSFSlot(JsfVersionMarker.JSF_2_0));
   Assert.assertFalse(factory.isValidJSFSlot(JsfVersionMarker.WAR_BUNDLES_JSF_IMPL));
   Assert.assertFalse(factory.isValidJSFSlot("bogus"));
   Assert.assertFalse(factory.isValidJSFSlot("bogus2"));
 }