assert_eq!(
      parse(&[envelope(&[b"ord", &[1], b"text/plain;charset=utf-8"])]),
      vec![ParsedEnvelope {
        payload: Inscription {
          content_type: Some(b"text/plain;charset=utf-8".to_vec()),
          ..Default::default()
        },
        ..Default::default()
      }],
    );
  }

  #[test]
  fn no_content_type() {
    assert_eq!(
      parse(&[envelope(&[b"ord", &[], b"foo"])]),
      vec![ParsedEnvelope {
        payload: Inscription {
          body: Some(b"foo".to_vec()),
          ..Default::default()
        },
        ..Default::default()
      }],
    );
  }

  #[test]
  fn valid_body_in_multiple_pushes() {
    assert_eq!(
      parse(&[envelope(&[
        b"ord",
        &[1],
        b"text/plain;charset=utf-8",
        &[],
        b"foo",
        b"bar"
      ])]),
      vec![ParsedEnvelope {
        payload: inscription("text/plain;charset=utf-8", "foobar"),
        ..Default::default()
      }],
    );
  }

  #[test]
  fn valid_body_in_zero_pushes() {
    assert_eq!(
      parse(&[envelope(&[b"ord", &[1], b"text/plain;charset=utf-8", &[]])]),