RE:
Where should I place the Arquillian tests?
More generally, couldn't the interceptors go in a new module: ArjunaJTA/cdi This is because the raw jta/ module now has some dependencies that may not make sense in a standalone scenario (but would be acceptable in narayana-jta uber jar).
It still a good question about when you can actually execute the test phase as you need the container to have its version of Narayana replaced, currently we have to do these tests in scripts/hudson/narayana.sh after we have built the AS with Narayana in it. Maybe these cdi integration tests should be moved to qa/ somewhere (on a related note, perhaps the XTS tests should exist under there too)? The AS for example has a "testsuite" hierarchy for integration tests.
Tom