Runs the test case.
Document doc;
NodeList elementList;
Node employeeNode;
Node clonedNode;
Node parentNode;
doc = (Document) load("staff", true);
elementList = doc.getElementsByTagName("employee");
employeeNode = elementList.item(1);
clonedNode = employeeNode.cloneNode(false);
parentNode = clonedNode.getParentNode();
assertNull("nodeCloneGetParentNullAssert1", parentNode);