# hail no input file
./test/hail
>>>= 1

# hbal no backend
./test/hbal
>>>= 1

# hspace no backend
./test/hspace
>>>= 1

# hinfo no backend
./test/hinfo
>>>= 1

# hbal multiple backends
./test/hbal -t /dev/null -m localhost
>>>2
Error: Only one of the rapi, luxi, and data files options should be given.
>>>= 1