We lacked a test suite that even just tried connecting to a server and bouncing a few stanzas back and forth. The "runtests" suite does just that. It connects to 2 accounts on a server (set in a config file ~/.pontarius-xmpp-tests/pontarius-xmpp-tests.conf) and tries passing some messages and IQ stanzas back and forth. This should clear the way for more interesting scenarios.
See RFC6120 §8.4 ( http://xmpp.org/rfcs/rfc6120.html#stanzas-extended )