fun withPush(promise: PushPromise) =
    apply {
      promises.add(promise)
    }

  fun withSettings(settings: Settings) =
    apply {
      this.settings = settings
    }

  fun withWebSocketUpgrade(listener: WebSocketListener) =
    apply {
      status = "HTTP/1.1 101 Switching Protocols"
      setHeader("Connection", "Upgrade")
      setHeader("Upgrade", "websocket")
      body = null

    mockResponse = mockResponse.withSettings(Settings())
    var settings: Settings = mockResponse.settings
    settings = mockResponse.settings
    mockResponse =
      mockResponse.withWebSocketUpgrade(
        object : WebSocketListener() {
        },
      )
    var webSocketListener: WebSocketListener? = mockResponse.webSocketListener
    webSocketListener = mockResponse.webSocketListener
  }