.count(),
      4
    );

    assert_eq!(
      Inscription {
        metadata: Some(vec![0; 1]),
        ..Default::default()
      }
      .append_reveal_script(script::Builder::new())
      .instructions()
      .count(),
      6
    );

    assert_eq!(
      Inscription {
        metadata: Some(vec![0; 520]),
        ..Default::default()
      }
      .append_reveal_script(script::Builder::new())
      .instructions()
      .count(),
      6
    );

    assert_eq!(
      Inscription {
        metadata: Some(vec![0; 521]),
        ..Default::default()
      }
      .append_reveal_script(script::Builder::new())
      .instructions()
      .count(),
      8
    );
  }

  #[test]
  fn inscription_with_no_parent_field_has_no_parent() {
    assert!(Inscription {
      parent: None,
      ..Default::default()
    }
    .parent()
    .is_none());
  }

  #[test]
  fn inscription_with_parent_field_shorter_than_txid_length_has_no_parent() {
    assert!(Inscription {
      parent: Some(vec![]),
      ..Default::default()