for (int i = 0; i < nestingDepth; i++) {
      iterator = Iterators.concat(iterateOver(1), iterator);
    }
    assertEquals(nestingDepth, Iterators.size(iterator));
  }

  public void testAddAllWithEmptyIterator() {
    List<String> alreadyThere = Lists.newArrayList("already", "there");

    boolean changed = Iterators.addAll(alreadyThere, Iterators.<String>emptyIterator());