final DocsEnum docsEnum = aReader.termDocsEnum(new Term(DEFAULT_TEST_FIELD, new BytesRef("aaa")));
assertTrue(docsEnum instanceof Siren10DocsEnum);
final Siren10DocsNodesAndPositionsEnum e = ((Siren10DocsEnum) docsEnum).getDocsNodesAndPositionsEnum();
// first skip in skiplist is at 512
assertTrue(e.skipTo(502));
assertEquals(502, e.doc());
assertEquals(1, e.nodeFreqInDoc());
assertTrue(e.nextNode());
assertEquals(node(5,3,6,3), e.node());
assertFalse(e.nextNode());