Description of problem:

systemd --test can not be run as root nor as an ordinary user

Version-Release number of selected component (if applicable):
Fedora 19

How reproducible:
Allways

Steps to Reproduce:
1. as root:
systemd --test --system --unit=multi-user.target
Don't run test mode as root.
2. as a normal user:
$ systemd --test --system --unit=multi-user.target
systemd 204 running in system mode. (+PAM +LIBWRAP +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ)
Failed to set hostname to <fc20.homelinux.org>: Operation not permitted
Failed to open /dev/tty0: Permission denied
Failed to create root cgroup hierarchy: Permission denied
Failed to allocate manager object: Permission denied

Actual results:
useless results

Expected results:
Usefull results

Additional info:

Bug proves --test functionality is not understood by the programmers. 
--test implies do nothing harmful and should be run by root.

Bug proves --test functionality has not been tested at all.
This example is strait from the fedora 19 docs.