How to use the snitun.server.sni.parse_tls_sni function in snitun

def test_good_client_hello(test_package: bytes):
    """Test good TLS packages."""
    assert sni.parse_tls_sni(test_package) == "localhost"

def test_bad_client_hello(test_package: bytes):
    """Test bad client hello."""
    with pytest.raises(ParseSNIError):
        sni.parse_tls_sni(test_package)

return
            except OSError:
                return
        else:
            client_hello = data

        # Connection closed before data received
        if not client_hello:
            with suppress(OSError):
                writer.close()
            return

        try:
            # Read Hostname
            try:
                hostname = parse_tls_sni(client_hello)
            except ParseSNIError:
                _LOGGER.warning("Receive invalid ClientHello on public Interface")
                return

            # Peer available?
            if not self._peer_manager.peer_available(hostname):
                _LOGGER.debug("Hostname %s not connected", hostname)
                return
            peer = self._peer_manager.get_peer(hostname)

            # Proxy data over mutliplexer to client
            _LOGGER.debug("Processing for hostname % started", hostname)
            await self._proxy_peer(peer.multiplexer, client_hello, reader, writer)

        finally:
            if not writer.transport.is_closing():