* overriding [.configureServerSocket].
 */
open class DelegatingServerSocketFactory(private val delegate: ServerSocketFactory) : ServerSocketFactory() {
  @Throws(IOException::class)
  override fun createServerSocket(): ServerSocket {
    val serverSocket = delegate.createServerSocket()
    return configureServerSocket(serverSocket)
  }

  @Throws(IOException::class)

    server = MockWebServer()
    server.serverSocketFactory =
      object : DelegatingServerSocketFactory(getDefault()) {
        @Throws(SocketException::class)
        override fun configureServerSocket(serverSocket: ServerSocket): ServerSocket {
          serverSocket.setReceiveBufferSize(SOCKET_BUFFER_SIZE)
          return serverSocket
        }
      }
    client =
      clientTestRule.newClientBuilder()