Runs the test case.
Document doc;
EntityReference newEntRefNode;
String entRefValue;
String entRefName;
int entRefType;
doc = (Document) load("staff", true);
newEntRefNode = doc.createEntityReference("ent1");
assertNotNull("createdEntRefNotNull", newEntRefNode);
entRefValue = newEntRefNode.getNodeValue();
assertNull("value", entRefValue);
entRefName = newEntRefNode.getNodeName();
assertEquals("name", "ent1", entRefName);
entRefType = (int) newEntRefNode.getNodeType();
assertEquals("type", 5, entRefType);