public void testGetNext_withDefault_two() {
    Iterator<String> iterator = asList("foo", "bar").iterator();
    assertEquals("foo", Iterators.getNext(iterator, "x"));
  }

  public void testGetLast_basic() {
    List<String> list = newArrayList();
    list.add("a");
    list.add("b");
    assertEquals("b", getLast(list.iterator()));
  }

  public void testGetLast_exception() {

  @SuppressWarnings("CatchingUnchecked") // sneaky checked exception
  private void appendUserObject(StringBuilder builder, @CheckForNull Object o) {
    // This is some basic recursion detection for when people create cycles via set/setFuture or
    // when deep chains of futures exist resulting in a StackOverflowException. We could detect