assertFalse(partitions.hasNext());
  }

  public void testPartition_singleton2() {
    Iterator<Integer> source = singletonIterator(1);
    Iterator<List<Integer>> partitions = Iterators.partition(source, 2);
    assertTrue(partitions.hasNext());
    assertTrue(partitions.hasNext());
    assertEquals(ImmutableList.of(1), partitions.next());
    assertFalse(partitions.hasNext());
  }