Using AS 7.1.0.Final you will need two @Deployment with an 'order' attribute - one for the RAR (1) and one for the WAR (2) - but those types of questions are better answered in the ShrinkWrap/Arquillian/AS7 forums.
For IronJamacar/Embedded we don't have a web container for WAR->RAR testing - you will need pure JUnit test cases against the resource adapter. You can check our test suite for examples - otherwise the user guide contains a basic example too.
Having said that, an optional web container integration for IronJacamar/Embedded would be a nice contribution.
And we are always looking for feedback for the testing scenario, since it is one of the focus areas for IronJacamar 1.1.