peer.acceptFrame() // SYN_STREAM on stream 1
    for (i in 0 until framesThatFillWindow) {
      peer.acceptFrame() // DATA on stream 1
    }
    peer.acceptFrame() // SYN_STREAM on stream 2
    peer.acceptFrame() // DATA on stream 2
    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream1 = connection.newStream(headerEntries("a", "apple"), true)