task = withLock {
              afterRun(task, delayNanos, true)
              awaitTaskToRun()
            } ?: return
          }
        } catch (thrown: Throwable) {
          // A task failed. Update execution state and re-throw the exception.
          withLock {
            afterRun(task, -1L, false)
          }

      writerQueue.schedule("$connectionName ping", pingIntervalNanos) {
        val failDueToMissingPong =
          withLock {
            if (intervalPongsReceived < intervalPingsSent) {
              return@withLock true
            } else {
              intervalPingsSent++
              return@withLock false
            }
          }
        if (failDueToMissingPong) {
          failConnection(null)

    if (!flushHeaders) {
      withLock {
        flushHeaders = (connection.writeBytesTotal >= connection.writeBytesMaximum)
      }
    }

    connection.writeHeaders(id, outFinished, responseHeaders)

    if (flushHeaders) {
      connection.flush()
    }
  }

  fun enqueueTrailers(trailers: Headers) {
    withLock {
      check(!sink.finished) { "already finished" }

import okhttp3.internal.closeQuietly
import okhttp3.internal.concurrent.Lockable
import okhttp3.internal.concurrent.assertLockHeld
import okhttp3.internal.concurrent.assertLockNotHeld
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.http.BridgeInterceptor
import okhttp3.internal.http.CallServerInterceptor
import okhttp3.internal.http.RealInterceptorChain
import okhttp3.internal.http.RetryAndFollowUpInterceptor

  override fun noNewExchanges() {
    withLock {
      noNewExchanges = true
    }
    connectionListener.noNewExchanges(this)
  }

  /** Prevent this connection from being used for hosts other than the one in [route]. */
  internal fun noCoalescedConnections() {
    withLock {
      noCoalescedConnections = true
    }
  }

import okhttp3.Protocol
import okhttp3.Request
import okhttp3.Route
import okhttp3.internal.closeQuietly
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.connection.RoutePlanner.ConnectResult
import okhttp3.internal.http.ExchangeCodec
import okhttp3.internal.http1.Http1ExchangeCodec
import okhttp3.internal.platform.Platform

import okhttp3.Request
import okhttp3.TestUtil.awaitGarbageCollection
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.TaskRunner.RealBackend
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.http2.Http2
import okhttp3.internal.http2.Http2Connection
import okhttp3.internal.http2.Http2ConnectionTest
import okhttp3.internal.http2.MockHttp2Peer
import okhttp3.internal.http2.Settings

import okhttp3.internal.concurrent.TaskFaker
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.notifyAll
import okhttp3.internal.concurrent.wait
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.connection.asBufferedSocket
import okio.AsyncTimeout
import okio.Buffer
import okio.BufferedSource
import okio.Source
import okio.buffer
import org.junit.jupiter.api.AfterEach