iOS UI testing for XMPP based app

I have XMPP based app that is something like chat. I use XMPPFramework for XMPP implementation. I would like to make UI testing where I need to send messages from different users. So I need to have mocking or two instances of app at the same time.

Is there framework for mocking or stubbing xmpp server like OHTTPStubs?

Is there a way to run tests simultaneously with ability to specify which test methods should be run?

I tried to use Bluepill for it but it seems that it doesn't fit for my purpose.