try {
      iterator.set("1");
      fail("transformed list iterator is settable");
    } catch (UnsupportedOperationException | IllegalStateException expected) {
    }
  }

  public void testTransformIteratorRandomAccess() {
    List<Integer> fromList = new ArrayList<>(SOME_LIST);
    List<String> list = transform(fromList, SOME_FUNCTION);
    assertTransformIterator(list);
  }