assertTrue(
        "partition[1] should be RandomAccess, but not: " + partitions.get(1).getClass(),
        partitions.get(1) instanceof RandomAccess);
  }

  public void testPartitionRandomAccessFalse() {
    List<Integer> source = new LinkedList<>(asList(1, 2, 3));
    List<List<Integer>> partitions = partition(source, 2);
    assertFalse(partitions instanceof RandomAccess);