/**
   * For clients this is initially null, and will be assigned to the agreed-upon extensions. For
   * servers it should be the agreed-upon extensions immediately.
   */
  private var extensions: WebSocketExtensions?,
  /** If compression is negotiated, outbound messages of this size and larger will be compressed. */
  private var minimumDeflateSize: Long,
  private val webSocketCloseTimeout: Long,

import okhttp3.internal.platform.Platform
import okhttp3.internal.threadFactory
import okhttp3.internal.toImmutableList
import okhttp3.internal.ws.RealWebSocket
import okhttp3.internal.ws.WebSocketExtensions
import okhttp3.internal.ws.WebSocketProtocol
import okio.Buffer
import okio.BufferedSink
import okio.BufferedSource
import okio.Sink
import okio.Timeout
import okio.buffer
import okio.sink

import okhttp3.Headers.Companion.headersOf
import okhttp3.Protocol
import okhttp3.Request
import okhttp3.Response
import okhttp3.TestUtil.repeat
import okhttp3.internal.concurrent.TaskFaker
import okhttp3.internal.ws.WebSocketExtensions.Companion.parse
import okio.ByteString.Companion.decodeHex
import okio.ByteString.Companion.encodeUtf8
import okio.Pipe
import okio.buffer
import org.junit.jupiter.api.AfterEach