Empty subclass
Check that uploads are subclassed too

Create with %args vs. SetVar
Calling instance twice
Calling instance after A::R
Calling param w/ and w/o encode_parms, w/ and w/o param, in list or scalar
Calling parms, checking table
Calling parms twice returns same table
Calling upload(), upload(UPLOAD) scalar/list
Calling Upload->next
Check decode_parms / encode_parms

Check handler


