test/test-execute/exec-dynamicuser-supplementarygroups.service

[Unit]
Description=Test DynamicUser with SupplementaryGroups=

[Service]
ExecStart=/bin/sh -x -c 'test "$$(id -G | cut -d " " --complement -f 1)" = "1 2 3"'
Type=oneshot
DynamicUser=yes
SupplementaryGroups=1 2 3