How do I simulate perhaps a slow connection where the web socket might be stuck in WebSocket.CONNECTING

[sfc-gh-jtjhin]

I think this would require the on connection listener be an async function?

The use case is that we've implemented our own re-try logic that has a timeout if the web socket is stuck in connecting. And I would like to write tests for it

[kettanaito]

Hi. Yeah, we might want to support async listeners, too. That's already a thing for HTTP requests in Interceptors. Shouldn't be a big task to add that support for WebSocket. Mostly comes down to swapping this.emitter.emit with emitAsync(this.emitter, ...). You would then be able to use await delay() from msw in the connection listener to simulate pending connection.

May I please ask you to open a feature request for it in here https://github.com/mswjs/interceptors/issues/new? Thank you!

[sfc-gh-jtjhin]

Cool, I created mswjs/interceptors#711