Runs the test case.
Document doc;
NodeList elementList;
Attr newAttribute;
Node testAddress;
NamedNodeMap attributes;
Attr streetAttr;
boolean specified;
Node removedNode;
doc = (Document) load("hc_staff", true);
elementList = doc.getElementsByTagName("acronym");
testAddress = elementList.item(2);
attributes = testAddress.getAttributes();
removedNode = attributes.removeNamedItem("class");
streetAttr = (Attr) attributes.getNamedItem("class");
assertNull("isnull", streetAttr);