[Unit]
Description=Test for basic execution

[Service]
ExecStart=touch /tmp/a ; /bin/touch /tmp/b ; touch /tmp/c
ExecStart=test -f /tmp/a
ExecStart=!test -f /tmp/b
ExecStart=!!test -f /tmp/c
ExecStart=+test -f /tmp/c
ExecStartPost=rm /tmp/a /tmp/b /tmp/c

PrivateTmp=true
Type=oneshot