Runs the test case.
Document doc;
NodeList addressList;
Node testNode;
NamedNodeMap attributes;
Attr domesticAttr;
Node s;
doc = (Document) load("staff", false);
addressList = doc.getElementsByTagName("address");
testNode = addressList.item(0);
attributes = testNode.getAttributes();
domesticAttr = (Attr) attributes.getNamedItem("domestic");
s = domesticAttr.getParentNode();
assertNull("attrParentNodeNullAssert", s);