public virtual void testClone()
{
JDFDoc d = new JDFDoc("JDF");
JDFDoc d2 = (JDFDoc)d.Clone();
KElement e1 = d.getRoot();
KElement e2 = d2.getRoot();
Assert.AreNotEqual(e1, e2);
e1.appendElement("foo");
Assert.IsNull(e2.getElement("foo"));
}