client
        .newBuilder()
        .eventListener(listener)
        .build()
    val body =
      MockSocketHandler()
        .sendResponse("/a has moved!\n", duplexResponseSent)
        .requestIOException()
        .exhaustResponse()
    server.enqueue(
      MockResponse
        .Builder()
        .clearHeaders()
        .code(HttpURLConnection.HTTP_MOVED_PERM)
        .addHeader("Location: /b")