kill-child-jobs/test/test-kill-child-jobs.sh

#!/bin/sh
set -e

DIR="$(dirname "$0")"

SCRIPT="$1"
SHELL="$2"

if [ ! -x "$SCRIPT" ]
then
    >&2 echo "First argument should be file with kill_child_jobs() function to test."
    exit 1
fi

if ! command -v "$SHELL" >/dev/null
then
    >&2 echo "Second argument should be shell to test."
    exit 1
fi

TMP="$(mktemp)"



# timeout code from https://stackoverflow.com/a/10028986
pidFile="$(mktemp)"
(
    "$SHELL" "$DIR/make-and-kill-child-jobs.sh" "$SCRIPT" >"$TMP" 2>&1 || true
    rm "$pidFile"
) &
pid=$!
echo $pid > "$pidFile"
(
    sleep 1
    if [ -e "$pidFile" ]
    then
        pkill -P $pid
        printf '∞'
    fi
) &
killerPid=$!

wait $pid
kill $killerPid 2>/dev/null || true
rm -f "$pidFile" || true

# Make sure we've waited long enough for the "outlived" messages to be generated.
sleep 0.1s

if grep -q '^shell does not support disown$' "$TMP"
then
    printf 'X'
fi

if ! grep -q '^disowned outlived parent.$' "$TMP"
then
    # disowned should have outlived parent
    EXITCODE=2
    printf '☠'
elif grep -q '^job outlived parent.$' "$TMP"
then
    # job should not outlive parent
    EXITCODE=3
    printf '🏃'
else
    # all good
    EXITCODE=0
    printf '✔️'
fi

rm -f "$TMP"
exit $EXITCODE