// test coveredText() on root
path = "/:coveredText()";
featurePath = new FeaturePathImpl();
featurePath.initialize(path);
assertEquals(path, featurePath.getFeaturePath());
featurePath.typeInit(cas.getDocumentAnnotation().getType());
assertEquals(cas.getDocumentText(), featurePath.getValueAsString(cas
.getDocumentAnnotation()));
assertEquals(cas.getDocumentText(), featurePath.ll_getValueAsString(cas.getLowLevelCAS().ll_getFSRef(
cas.getDocumentAnnotation()), cas.getLowLevelCAS()));
assertEquals(cas.getDocumentAnnotation().getType(), featurePath.getType(cas.getDocumentAnnotation()));