Iterator<Integer> source = emptyIterator();
    Iterator<List<Integer>> partitions = Iterators.paddedPartition(source, 1);
    assertFalse(partitions.hasNext());
  }

  public void testPaddedPartition_singleton1() {
    Iterator<Integer> source = singletonIterator(1);
    Iterator<List<Integer>> partitions = Iterators.paddedPartition(source, 1);
    assertTrue(partitions.hasNext());
    assertTrue(partitions.hasNext());