# RUN: env fth=%fish_test_helper %fish %s

# Ensure that lots of nested jobs all end up in the same pgroup.

function save_pgroup -a var_name
    $fth print_pgrp | read -g $var_name
end

# Here everything should live in the pgroup of the first fish_test_helper.
$fth print_pgrp | read -g global_group | save_pgroup g1 | begin
    save_pgroup g2
end

[ "$global_group" -eq "$g1" ] && [ "$g1" -eq "$g2" ]
and echo "All pgroups agreed"
or echo "Pgroups disagreed. Should be in $global_group but found $g1 and $g2"
# CHECK: All pgroups agreed

# Here everything should live in fish's pgroup.
# Unfortunately we don't know what fish's pgroup is (it may not be fish's pid).
# So run it twice and verify that everything agrees; this implies that it could
# not have used any of the pids of the child procs.
function nothing
end
nothing | $fth print_pgrp | read -g a0 | save_pgroup a1 | begin
    save_pgroup a2
end
nothing | $fth print_pgrp | read -g b0 | save_pgroup b1 | begin
    save_pgroup b2
end

[ "$a0" -eq "$a1" ] && [ "$a1" -eq "$a2" ] \
    && [ "$b0" -eq "$b1" ] && [ "$b1" -eq "$b2" ] \
    && [ "$a0" -eq "$b0" ]
and echo "All pgroups agreed"
or echo "Pgroups disagreed. Found $a0 $a1 $a2, and $b0 $b1 $b2"
# CHECK: All pgroups agreed

# Ensure that if a background job launches another background job, that they have different pgroups.
# The pipeline here will arrange for the two pgroups to be printed on the same line, like:
#   123 124
# Our regex will capture the first pgroup and use a negative lookahead on the second.
status job-control full
$fth print_pgrp | begin
    tr \n ' '
    $fth print_pgrp | tr \n ' ' &
end &
wait
echo
# CHECK: {{(\d+) (?!\1)\d+}}