RowIterator it = r.getRows();
assertEquals(3, r.getRows().getSize());
assertEquals(3, r.getNodes().getSize());
Row row;
try {
it.skip(i);
assertTrue(i >= 0 && i <= 3);
} catch (IllegalArgumentException e) {
assertEquals(-1, i);
} catch (NoSuchElementException e) {
assertTrue(i >= 2);