Runs the test case.
Document doc;
DocumentFragment docFragment;
String nodeValue;
Text txtNode;
Node retval;
doc = (Document) load("hc_staff", true);
docFragment = doc.createDocumentFragment();
txtNode = doc.createTextNode("foo");
retval = docFragment.appendChild(txtNode);
txtNode = doc.createTextNode("bar");
retval = docFragment.appendChild(txtNode);
docFragment.normalize();
txtNode = (Text) docFragment.getFirstChild();
nodeValue = txtNode.getNodeValue();
assertEquals("normalizedNodeValue", "foobar", nodeValue);
retval = txtNode.getNextSibling();
assertNull("singleChild", retval);