tests: Add incus-user test

Closes #142

Signed-off-by: Stéphane Graber <stgraber@stgraber.org>

test/main.sh

@@ -354,6 +354,7 @@ if [ "${1:-"all"}" != "cluster" ]; then
     run_test test_metrics "Metrics"
     run_test test_storage_volume_recover "Recover storage volumes"
     run_test test_syslog_socket "Syslog socket"
+    run_test test_incus_user "incus-user"
 fi
 
 # shellcheck disable=SC2034

test/suites/incus_user.sh

@@ -0,0 +1,19 @@
+test_incus_user() {
+  ensure_import_testimage
+  ensure_has_localhost_remote "${INCUS_ADDR}"
+
+  incus-user --group nogroup &
+  USER_PID="$!"
+  while :; do
+    [ -S "${INCUS_DIR}/unix.socket.user" ] && break
+  done
+
+  USER_TEMPDIR="${TEST_DIR}/user"
+  mkdir "${USER_TEMPDIR}"
+  chown nobody:nogroup "${USER_TEMPDIR}"
+
+  cmd=$(unset -f incus; command -v incus)
+  sudo -u nobody -Es -- env INCUS_CONF="${USER_TEMPDIR}" "${cmd}" project list
+
+  kill -9 "${USER_PID}"
+}