[Puppet Users] How do I check content of a file in puppet

How do I check content of a file in puppet?
ex: I want to see if "PermitRootLogin" is "no" in /etc/ssh/sshd_config file
(RHEL). If it's "yes" i want to show it on compliance report. For now I
don't want make any changes to the sshd_config file through puppet.

Here is something I have:

define line($file, $line, $ensure = 'present') {
$line = "PermitRootLogin no"
$file = "/etc/ssh/sshd_config"
case $ensure {
default : { err ( "unknown ensure value ${ensure}" ) }
present: {
warning/flag code:
unless => "/bin/grep '${line}' '${file}'"
}
}
}