Listening to web socket messages without sending anything in Gatling 3.0

Gatling (Open-Source)
1

I have a use case where I just want to listen to web socket messages.
I send messages to the service over HTTP protocol and expect some response over WebSocket.
But I am unable to do this in Gatling v3.0. I can only send messages and expect something. I don’t have anything to send over WebSocket.

Something like this:

scenario(“open websocket and check incoming messages”)
.exec(feed(feeder))
.exec(openWebSocket)
.pause(1)
.repeat("${wsMessagesCount}") {
exec(publishMessage())
.pause(1)
.exec(
ws(“Listen”)
.await(CheckMsgWaitTime)(
wsCheckMsg
)
)

}
.exec(closeWebSocket)

Can someone please help?

2

It seems like there is no way to listen the WS connection without sending messages to the server as ‘await’ has to be connected with ‘sendText’. I tried to add several checks to the one ‘sentText’ but they all listen the first answer message from the server and the following seems to be received to the /dev/null.