..Default::default()
        }
        .hidden(),
        expected
      );
    }

    case(None, None, false);
    case(Some("foo"), None, false);
    case(Some("foo"), Some("{}"), false);
    case(Some("text/plain"), None, false);
    case(Some("text/plain"), Some("foo{}bar"), false);
    case(Some("text/plain"), Some("foo.btc"), true);

    case(Some("text/plain"), Some("foo.bitmap"), true);
    case(Some("text/plain"), Some("gib bc1"), true);
    case(Some("text/plain"), Some("{}"), true);
    case(Some("text/plain"), Some(" {} "), true);
    case(Some("text/plain;charset=utf-8"), Some("foo.bitmap"), true);
    case(Some("text/plain;charset=cn-big5"), Some("foo.bitmap"), true);
    case(Some("application/json"), Some("foo"), true);

    assert!(!Inscription {
      content_type: Some("text/plain".as_bytes().into()),
      body: Some(b"{\xc3\x28}".as_slice().into()),
      ..Default::default()
    }
    .hidden());
  }
}