How to check Faye asynchronous server?

Question

I use the private_pub gem to work in real time in my application.

I feel really guilty, but I refused to test this application!

To make sure everything works manually, I have to open two browsers that communicate with each other. (Imagine facebook chat.)

I do not know how to immediately open two browsers in selenium, capybara or cucumber. I am open to any kind of platform or utility.

How to check two open browsers? Let me know if you need more information.

Thank!