Factor out mod_authz_groupfile to its own class

This makes it easier to run with default mods disabled while still using
this mod.

Author: ekohl

manifests/default_mods.pp

@@ -157,8 +157,7 @@
     }
 
     include apache::mod::authz_user
-
-    ::apache::mod { 'authz_groupfile': }
+    include apache::mod::authz_groupfile
     include apache::mod::env
   } elsif $mods {
     ::apache::default_mods::load { $mods: }

manifests/mod/authz_groupfile.pp

@@ -0,0 +1,9 @@
+# @summary
+#   Installs `mod_authz_groupfile`
+#
+# @see https://httpd.apache.org/docs/current/mod/mod_authz_groupfile.html for additional documentation.
+#
+class apache::mod::authz_groupfile {
+  include apache
+  apache::mod { 'authz_groupfile': }
+}

spec/classes/mod/authz_groupfile_spec.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'apache::mod::authz_groupfile' do
+  it_behaves_like 'a mod class, without including apache'
+
+  context 'default configuration with parameters' do
+    context 'on a Debian OS' do
+      include_examples 'Debian 11'
+
+      it { is_expected.to contain_apache__mod('authz_groupfile') }
+    end
+  end
+end