[Unit]
Description=Test for Environment
 
[Service]
ExecStart=/bin/sh -x -c 'test "$${VAR1-unset}" = "unset" && test "$${VAR2-unset}" = "unset" && test "$${VAR3-unset}" = "unset"'
Type=oneshot
Environment="VAR1=word1 word2" VAR2=word3 "VAR3=$word 5 6"
Environment=