frame.writeInt(expectedWindowSizeIncrement.toInt())

    // Check writer sends the same bytes.
    assertThat(windowUpdate(expectedWindowSizeIncrement)).isEqualTo(frame)
    reader.nextFrame(
      requireSettings = false,
      object : BaseTestHandler() {
        override fun windowUpdate(
          streamId: Int,
          windowSizeIncrement: Long,
        ) {

  }

  internal fun writeWindowUpdateLater(
    streamId: Int,
    unacknowledgedBytesRead: Long,
  ) {
    writerQueue.execute("$connectionName[$streamId] windowUpdate") {
      try {
        writer.windowUpdate(streamId, unacknowledgedBytesRead)
      } catch (e: IOException) {
        failConnection(e)
      }
    }
  }

  fun writePing(
    reply: Boolean,
    payload1: Int,

        frameLogWindowUpdate(
          inbound = true,
          streamId = streamId,
          length = length,
          windowSizeIncrement = increment,
        ),
      )
    }
    handler.windowUpdate(streamId, increment)
  }

  @Throws(IOException::class)
  override fun close() {
    source.close()
  }

  /**

    }
  }

  /**
   * Inform peer that an additional `windowSizeIncrement` bytes can be sent on `streamId`, or the
   * connection if `streamId` is zero.
   */
  @Throws(IOException::class)
  fun windowUpdate(
    streamId: Int,
    windowSizeIncrement: Long,
  ) {
    withLock {
      if (closed) throw IOException("closed")
      require(windowSizeIncrement != 0L && windowSizeIncrement <= 0x7fffffffL) {

  /** The total number of bytes produced by the application. */
  var writeBytesTotal = 0L
    internal set

  /** The total number of bytes permitted to be produced by incoming `WINDOW_UPDATE` frame. */
  var writeBytesMaximum: Long = connection.peerSettings.initialWindowSize.toLong()
    internal set

  /** Received headers yet to be [taken][takeHeaders]. */
  private val headersQueue = ArrayDeque<Headers>()