public void testUnique() {
SelectorEngineImpl selSizz = new SelectorEngineSizzle();
GQuery g = $(e).html("<div><p></p><p></p><span></span><p></p>");
JsNodeArray a;
a = selSizz.select("p", e).cast();
assertEquals(3, a.getLength());
a.addNode(a.getNode(0));
a.addNode(a.getNode(3));
assertEquals(5, a.getLength());
a = g.unique(a);