*/
package okhttp3

import okio.IOException
import okio.Timeout

/**
 * A call is a request that has been prepared for execution. A call can be canceled. As this object
 * represents a single request/response pair (stream), it cannot be executed twice.
 */
interface Call : Cloneable {
  /** Returns the original request that initiated this call. */
  fun request(): Request

  /**

            if (diagnostic is ConeDiagnosticWithCandidates) {
                diagnostic.candidates.mapNotNullTo(candidateCalls) {
                    createKtCall(psi, call, calleeReference, it, resolveFragmentOfCall)
                }
            } else {
                candidateCalls.addIfNotNull(createKtCall(psi, call, calleeReference, null, resolveFragmentOfCall))
            }

        .build()
    val latch = CountDownLatch(1)
    val exceptionRef = AtomicReference<Throwable>()
    val call = client.newCall(request)
    call.timeout().timeout(250, TimeUnit.MILLISECONDS)
    call.enqueue(
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {
          exceptionRef.set(e)
          latch.countDown()
        }

    call.plansToCancel -= connectPlan
  }

  override fun updateRouteDatabaseAfterSuccess(route: Route) {
    call.client.routeDatabase.connected(route)
  }

  override fun connectStart(route: Route) {
    eventListener.connectStart(call, route.socketAddress, route.proxy)
    poolConnectionListener.connectStart(route, call)
  }

  override fun connectFailed(
    route: Route,
    protocol: Protocol?,

@ExperimentalOkHttpApi
abstract class ConnectionListener {
  /**
   * Invoked as soon as a call causes a connection to be started.
   */
  open fun connectStart(
    route: Route,
    call: Call,
  ) {}

  /**
   * Invoked when a connection fails to be established.
   */
  open fun connectFailed(
    route: Route,
    call: Call,
    failure: IOException,
  ) {}

  /**

          call: Call,
          e: IOException,
        ) {
          latch.countDown()
        }

        override fun onResponse(
          call: Call,
          response: Response,
        ) {
          fail("")
        }
      },
    )
    assertThat(server.takeRequest().sequenceNumber)
      .isEqualTo(expectedSequenceNumber)
    responseDequeuedLatch!!.await()
    call.cancel()

        localhostIpv4,
        localhostIpv6,
      )
    serverIpv4.enqueue(
      MockResponse(body = "unexpected call to IPv4"),
    )
    serverIpv6.enqueue(
      MockResponse(body = "hello from IPv6"),
    )

    val call = client.newCall(Request(url))
    val response = call.execute()
    assertThat(response.body.string()).isEqualTo("hello from IPv6")

    check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }

    return copy(writeTimeoutMillis = checkDuration("writeTimeout", timeout.toLong(), unit))
  }

  override fun call(): Call = call

  override fun request(): Request = request

  @Throws(IOException::class)
  override fun proceed(request: Request): Response {
    check(index < interceptors.size)

    calls++

        .build()
    val call = client.newCall(request1)
    assertFailsWith<SocketTimeoutException> {
      call.execute() // we want this call to throw a SocketTimeoutException
    }
  }

  @Test
  fun chainCanCancelCall() {
    val callRef = AtomicReference<Call>()
    val interceptor =
      Interceptor { chain: Interceptor.Chain ->
        val call = chain.call()
        callRef.set(call)

    serverRule.server.enqueue(MockResponse())

    val call = client.newCall(Request(serverRule.server.url("/")))

    call.execute().use { response ->
      assertThat(response.code).isEqualTo(200)
    }
  }

  @Test
  fun testRequestExternal() {
    assumeNetwork()

    val call = client.newCall(Request("https://google.com/robots.txt".toHttpUrl()))

    call.execute().use { response ->