add test cases to verify that attachments can be "read" and "found" without content
add test cases to verify that attachments can be "read" and "found" without content

crchemist/scioncc,scionrep/scioncc,crchemist/scioncc,mkl-/scioncc,mkl-/scioncc,ooici/pyon,crchemist/scioncc,scionrep/scioncc,ooici/pyon,mkl-/scioncc,scionrep/scioncc