payload: inscription("text/plain;charset=utf-8", [0b10000000]),
        ..Default::default()
      },],
    );
  }

  #[test]
  fn no_endif() {
    let script = script::Builder::new()
      .push_opcode(opcodes::OP_FALSE)
      .push_opcode(opcodes::all::OP_IF)
      .push_slice(b"ord")
      .into_script();

    assert_eq!(
      parse(&[Witness::from_slice(&[script.into_bytes(), Vec::new()])]),
      Vec::new(),
    );
  }

  #[test]
  fn no_op_false() {
    let script = script::Builder::new()
      .push_opcode(opcodes::all::OP_IF)
      .push_slice(b"ord")
      .push_opcode(opcodes::all::OP_ENDIF)
      .into_script();

    assert_eq!(
      parse(&[Witness::from_slice(&[script.into_bytes(), Vec::new()])]),
      Vec::new(),
    );
  }

  #[test]
  fn empty_envelope() {
    assert_eq!(parse(&[envelope(&[])]), Vec::new());
  }

  #[test]
  fn wrong_protocol_identifier() {
    assert_eq!(parse(&[envelope(&[b"foo"])]), Vec::new());
  }

  #[test]
  fn extract_from_transaction() {
    assert_eq!(
      parse(&[envelope(&[