peer.acceptFrame() // SYN_STREAM
    peer.sendFrame().headers(false, 3, headerEntries("headers", "bam"))
    peer.acceptFrame() // PING
    peer.sendFrame().headers(true, 3, headerEntries("trailers", "boom"))
    peer.sendFrame().ping(true, Http2Connection.AWAIT_PING, 0) // PONG
    peer.play()

    // Play it back.
    val connection = connect(peer)

        Dispatcher::class.java to Dispatcher(),
        Handshake::class.java to handshake,
        HttpUrl::class.java to url,
        IOException::class.java to IOException("boom"),
        InetSocketAddress::class.java to InetSocketAddress.createUnresolved("localhost", 80),
        List::class.java to listOf<Any?>(),
        Long::class.java to 123L,