I think you can use tomee.xml for that purpose
Reference to the file can be probably specified through serverXml property in arquillian.xml TomEE configuration.
It seems that TomEE configuration in arquillian.xml doesn't suport any property like serverXml
here is the tomee's home page for Arquillian setting but it is not helpfull at alll
Thanks a lot , it is greate to have an answer from TomEE lead , But still I have problem.
The example in http://arquillian.org/guides/testing_java_persistence/ is very straight forward for setting up the arquillian for Glassfish or Jboss , can any one update this example to use Embedded tomcat or TomEE.
I am in desperate need of help for writing the ShrinkWrap (defining persistence.xml and defining datasource )for these containers.
I would suggest to look at examples referenced in this twitter thread, as well as some TomEE tests in their repository.
As for Tomcat Embedded, there is no JPA support out of the box, as Tomcat itself does not come with such feature (hence need for TomEE)