misleading; it was always used to configure redirects between `https://` and
    `http://` schemes.

 *  **RouteDatabase is no longer public API.** OkHttp continues to track which
    routes have failed but this is no exposed in the API.

 *  **ResponseSource is gone.** This enum exposed whether a response came from
    the cache, network, or both. OkHttp 2 offers more detail with raw access to

   * the proper value.
   */
  override fun writeRequestHeaders(request: Request) {
    val requestLine = RequestLine.get(request, carrier.route.proxy.type())
    writeRequest(request.headers, requestLine)
  }

  override fun reportedContentLength(response: Response): Long {
    return when {
      !response.promisesBody() -> 0L

    val receivedResponseAtMillis: Long = response.receivedResponseAtMillis()
  }

  @Test @Disabled
  fun route() {
    val route: Route = factory.newRoute()
    val address: Address = route.address()
    val proxy: Proxy = route.proxy()
    val inetSocketAddress: InetSocketAddress = route.socketAddress()
  }

  @Test @Disabled
  fun tlsVersion() {
    val tlsVersion: TlsVersion = TlsVersion.TLS_1_3

  private val addressA = factory.newAddress("a")
  private val routeA1 = factory.newRoute(addressA)
  private val addressB = factory.newAddress("b")
  private val routeB1 = factory.newRoute(addressB)
  private val addressC = factory.newAddress("c")
  private val routeC1 = factory.newRoute(addressC)

  @AfterEach fun tearDown() {
    factory.close()
    peer.close()
  }

    server.enqueue(
      MockResponse.Builder()
        .code(500)
        .build(),
    )
    val interceptor =
      Interceptor { chain: Interceptor.Chain ->
        val address = chain.connection()!!.route().address
        val sameHost = address.url.host
        val differentPort = address.url.port + 1
        chain.proceed(
          chain.request().newBuilder()
            .url("http://$sameHost:$differentPort/")

    responseBody = Buffer().asResponseBody(null, 0L)
  }

  @Test
  fun route() {
    val route: Route = factory.newRoute()
    val address: Address = route.address
    val proxy: Proxy = route.proxy
    val inetSocketAddress: InetSocketAddress = route.socketAddress
    val requiresTunnel: Boolean = route.requiresTunnel()
  }

  @Test
  fun socketPolicy() {

    return connectionListener.recordedEventTypes()
  }

  companion object {
    /**
     * A network that resolves only one IP address per host. Use this when testing route selection
     * fallbacks to prevent the host machine's various IP addresses from interfering.
     */
    private val SINGLE_INET_ADDRESS_DNS =
      Dns { hostname ->
        val addresses = Dns.SYSTEM.lookup(hostname)

    )

    // logically different scope of client for route db
    assertNotSame(
      client.routeDatabase,
      client.newBuilder()
        .dns { listOf() }
        .build()
        .routeDatabase,
    )
    assertNotSame(
      client.routeDatabase,
      client.newBuilder()
        .proxyAuthenticator { _: Route?, _: Response? -> null }
        .build()
        .routeDatabase,
    )

    ```kotlin
      private val client = OkHttpClient.Builder()
          .authenticator(object : Authenticator {
            @Throws(IOException::class)
            override fun authenticate(route: Route?, response: Response): Request? {
              if (response.request.header("Authorization") != null) {
                return null // Give up, we've already attempted to authenticate.
              }

  private val taskRunner = taskFaker.taskRunner

  /**
   * Note that we don't use the same [TaskFaker] for this factory. That way off-topic tasks like
   * connection pool maintenance tasks don't add noise to route planning tests.
   */
  private val routePlanner = FakeRoutePlanner(taskFaker = taskFaker)
  private val finder = FastFallbackExchangeFinder(routePlanner, taskRunner)

  @AfterEach
  fun tearDown() {