### Question:
XpathUtils { public static boolean isEmpty(Node node) { return (node == null); }  static Document documentFrom(InputStream is); static Document documentFrom(String xml); static Document documentFrom(URL url); static Double asDouble(String expression, Node node); static String asString(String expression, Node node); static Integer asInteger(String expression, Node node); static Boolean asBoolean(String expression, Node node); static Float asFloat(String expression, Node node); static Long asLong(String expression, Node node); static Byte asByte(String expression, Node node); static Date asDate(String expression, Node node); static ByteBuffer asByteBuffer(String expression, Node node); static boolean isEmpty(Node node); static int nodeLength(NodeList list); static Node asNode(String nodeName, Node node); static XPath xpath();  }### Answer:
@Test public void testIsEmpty() throws Exception { Document document = XpathUtils.documentFrom(DOCUMENT); Node emptyNode = XpathUtils.asNode("Foo/Fake", document); Node realNode = XpathUtils.asNode("Foo/Count", document); assertTrue(XpathUtils.isEmpty(emptyNode)); assertFalse(XpathUtils.isEmpty(realNode)); }