*  **OkHttpClient now implements the new `Call.Factory` interface.** This
    interface will make your code easier to test. When you test code that makes
    HTTP requests, you can use this interface to replace the real `OkHttpClient`
    with your own mocks or fakes.

    The interface will also let you use OkHttp's API with another HTTP client's
    implementation. This is useful in sandboxed environments like Google App

    )
    server.enqueue(MockResponse(body = "abc"))
    server.enqueue(MockResponse(body = "def"))
    val request = Request(server.url("/"))

    // First call makes a new connection and fails because it is the only route.
    assertFailsWith<StreamResetException> {
      client.newCall(request).execute()
    }.also { expected ->

 *
 *  * https://example.net/
 *
 *  * https://example.com/
 *
 * This is because those two hosts share the same IP address. This is an old, bad design decision
 * that makes `java.net.URL` unusable for many things. It shouldn't be used as a [Map] key or in a
 * [Set]. Doing so is both inefficient because equality may require a DNS lookup, and incorrect

    server.enqueue(
      MockResponse.Builder()
        .code(301)
        .setHeader("Location", "http://www.fakeurl:" + server.port)
        .build(),
    )
    server.enqueue(MockResponse())
    val dns = FakeDns()
    dns["fakeurl"] = client.dns.lookup(server.hostName)
    dns["www.fakeurl"] = client.dns.lookup(server.hostName)
    client =
      client.newBuilder()
        .dns(dns)
        .build()
    val call =

        if (dns != this.dns) {
          this.routeDatabase = null
        }
        this.dns = dns
      }

    /**
     * Sets the HTTP proxy that will be used by connections created by this client. This takes
     * precedence over [proxySelector], which is only honored when this proxy is null (which it is
     * by default). To disable proxy use completely, call `proxy(Proxy.NO_PROXY)`.
     */
    fun proxy(proxy: Proxy?) =

    peer.acceptFrame() // ACK
    peer.sendFrame().ping(false, 2, 0)
    peer.acceptFrame()
    peer.play()

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

    // fake a settings frame with clear flag set.
    val settings2 = Settings()
    settings2[Settings.MAX_CONCURRENT_STREAMS] = 60000
    connection.readerRunnable.applyAndAckSettings(true, settings2)
    connection.withLock {