tests.pp

# on init.pp
class role::server1 inherits role {
  include profile::common
  include profile::service1
}

class role::server2 inherits role {
  include profile::common
  include profile::service2
}

# on common.pp
vcsrepo { $app_folder:
  ensure   => latest,
  revision => $branch,
  provider => git,
  source   => $repository,
  identity => $private_key,
}

# on server1.pp
service { 'daphne':
  enable    => true,
  ensure    => running,
  subscribe => Vcsrepo["$app_folder"],
}

# on server2.pp
service { 'celeryd':
  enable    => true,
  ensure    => running,
  subscribe => Vcsrepo["$app_folder"],
}