.network(Network::Testnet)
      .build();

    let tempdir = TempDir::new().unwrap();

    let cookie_file = tempdir.path().join(".cookie");
    fs::write(&cookie_file, "username:password").unwrap();

    let options = Options::try_parse_from([
      "ord",
      "--cookie-file",
      cookie_file.to_str().unwrap(),
      "--rpc-url",
      &rpc_server.url(),
    ])
    .unwrap();

    assert_eq!(
      options.bitcoin_rpc_client().unwrap_err().to_string(),
      "Bitcoin RPC server is on testnet but ord is on mainnet"
    );
  }

  #[test]
  fn chain_flags() {
    Arguments::try_parse_from(["ord", "--signet", "--chain", "signet", "index", "update"])
      .unwrap_err();
    assert_eq!(
      Arguments::try_parse_from(["ord", "--signet", "index", "update"])
        .unwrap()
        .options
        .chain(),
      Chain::Signet
    );
    assert_eq!(
      Arguments::try_parse_from(["ord", "-s", "index", "update"])
        .unwrap()
        .options
        .chain(),
      Chain::Signet
    );

    Arguments::try_parse_from(["ord", "--regtest", "--chain", "signet", "index", "update"])