hmm, no Arquillian exports it to disk for so to use FileDataBodyPart in the HTTP request. We should beable to avoid going via Disk here, replacing it with a StreamBodyPart or similar.
Could you open a issue https://issues.jboss.org/browse/ARQ
Contributions are always welcome!
The relevant part is here:
You can read how to contribute here(of course, change ShrinkWrap with Arquillian etc..