Runs the test case.
Document doc;
NodeList acronymList;
Node testNode;
NamedNodeMap attributes;
Attr titleAttr;
String value;
Text textNode;
Node retval;
Node firstChild;
Node secondChild;
doc = (Document) load("hc_staff", true);
acronymList = doc.getElementsByTagName("acronym");
testNode = acronymList.item(3);
attributes = testNode.getAttributes();
titleAttr = (Attr) attributes.getNamedItem("title");
textNode = doc.createTextNode("terday");
retval = titleAttr.appendChild(textNode);
textNode = doc.createTextNode("");
retval = titleAttr.appendChild(textNode);
((Element) /*Node */testNode).normalize();
value = titleAttr.getNodeValue();
assertEquals("attrNodeValue", "Yesterday", value);
firstChild = titleAttr.getFirstChild();
value = firstChild.getNodeValue();
assertEquals("firstChildValue", "Yesterday", value);
secondChild = firstChild.getNextSibling();
assertNull("secondChildIsNull", secondChild);