Runs the test case.
Document doc;
Attr newAttrNode;
String attrValue;
String attrName;
int attrType;
doc = (Document) load("staff", true);
newAttrNode = doc.createAttribute("district");
attrValue = newAttrNode.getNodeValue();
assertEquals("value", "", attrValue);
attrName = newAttrNode.getNodeName();
assertEquals("name", "district", attrName);
attrType = (int) newAttrNode.getNodeType();
assertEquals("type", 2, attrType);