Kwalify (code)

my_frontend.pp

class apps::my_frontend($ensure = 'present', $port = 8080) {
  $args = get_scope_args()
  $schema = {
    'type' => 'map',
    'mapping' => {
      'ensure' => {
        'type' => 'str',
        'enum' => ['present', 'absent'],
      },
      'port' => {
        'type' => 'str',
        'pattern' => "/^\d\d\d\d$/"
        # int and number don't work - maybe puppet hashes don't work very well with kwalify!
        # 'range' => {'min' => 1, 'max' => 65535},
      }
    }
  }
  kwalify($schema, $args)

# ...
}