@Test
public void testOneElementBasic() {

  LOG.info("Test one element basic");
  set.add(list.get(0));
  // set should be non-empty
  assertEquals(1, set.size());
  assertFalse(set.isEmpty());
  // iterator should have next
  Iterator<Integer> iter = set.iterator();
  assertTrue(iter.hasNext());
  // iterator should not have next
  assertEquals(list.get(0), iter.next());
  assertFalse(iter.hasNext());
  LOG.info("Test one element basic - DONE");
}