public static void main(String[] args) {
    demonstrateTreasureChestIteratorForType(RING);
    demonstrateTreasureChestIteratorForType(POTION);
    demonstrateTreasureChestIteratorForType(WEAPON);
    demonstrateTreasureChestIteratorForType(ANY);

    demonstrateBstIterator();
  }
@Test
  void shouldExecuteApplicationWithoutException() {
    assertDoesNotThrow(() -> App.main(new String[]{}));
  }