Runs the test case.
Document doc;
NodeList genderList;
Node gender;
EntityReference entRef;
Element entElement;
Node appendedChild;
doc = (Document) load("staff", true);
genderList = doc.getElementsByTagName("gender");
gender = genderList.item(2);
entRef = doc.createEntityReference("ent4");
assertNotNull("createdEntRefNotNull", entRef);
appendedChild = gender.appendChild(entRef);
entElement = (Element) entRef.getFirstChild();
assertNotNull("entElementNotNull", entElement);
{
boolean success = false;
try {
entElement.removeAttribute("domestic");
} catch (DOMException ex) {
success = (ex.code == DOMException.NO_MODIFICATION_ALLOWED_ERR);
}
assertTrue("throw_NO_MODIFICATION_ALLOWED_ERR", success);
}