# let's try an error message first
shopt -z

# first, set up a known environment
shopt -u cdable_vars
shopt -s cdspell
shopt -u checkhash
shopt -u checkwinsize
shopt -s cmdhist
shopt -u dotglob
shopt -u execfail
shopt -s expand_aliases
shopt -u extglob
shopt -u histreedit
shopt -u histappend
shopt -u histverify
shopt -s hostcomplete
shopt -u huponexit
shopt -s interactive_comments
shopt -u lithist
shopt -u mailwarn
shopt -u nocaseglob
shopt -u nullglob
shopt -s promptvars
shopt -u shift_verbose
shopt -s sourcepath
shopt -u xpg_echo

# Now, start checking the output
builtin printf -- "--\n"
shopt -p	# list 'em all
builtin printf -- "--\n"
# test specific variables
shopt -p huponexit
shopt -p checkwinsize
shopt -p sourcepath

builtin printf -- "--\n"
shopt -s -p
builtin printf -- "--\n"
shopt -u -p
builtin printf -- "--\n"
shopt -u

# Now set up another known environment
set +o allexport
set -o braceexpand
set +o errexit
set -o hashall
set -o histexpand
set +o keyword
set -o monitor
set +o noclobber
set +o noexec
set +o noglob
set +o notify
set +o nounset
set +o onecmd
set +o physical
set -o privileged
set +o verbose
set +o xtrace
set -o history
set +o ignoreeof
set -o interactive-comments
set +o posix
set -o emacs
set +o vi

# list 'em all
builtin printf -- "--\n"
shopt -o -p

builtin printf -- "--\n"
set -o
builtin printf -- "--\n"
set +o

# test specific variables
builtin printf -- "--\n"
shopt -p -o history
shopt -p -o verbose

builtin printf -- "--\n"
shopt -s -p -o
builtin printf -- "--\n"
shopt -u -p -o
builtin printf -- "--\n"
shopt -u -o

# errors
builtin printf -- "--\n"
shopt -p xyz1
shopt -o -p xyz1