Runs the test case.
Document doc;
DocumentType docType;
NamedNodeMap entities;
NamedNodeMap notations;
Entity entity;
Notation notation;
String entityName;
String notationName;
String nullNS = null;
doc = (Document) load("staffNS", false);
docType = doc.getDoctype();
entities = docType.getEntities();
assertNotNull("entitiesNotNull", entities);
notations = docType.getNotations();
assertNotNull("notationsNotNull", notations);
entity = (Entity) entities.getNamedItemNS(nullNS, "ent1");
assertNull("entityNull", entity);
notation = (Notation) notations.getNamedItemNS(nullNS, "notation1");
assertNull("notationNull", notation);