Enable basic acceptance test

spec/acceptance/requirements_spec.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'spec_helper_acceptance'
+
+describe 'posix_acl' do
+  context 'with default behaviour' do
+    let(:pp) do
+      'include posix_acl::requirements'
+    end
+
+    it 'works idempotently with no errors' do
+      apply_manifest(pp, catch_failures: true)
+      apply_manifest(pp, catch_changes: true)
+    end
+
+    describe package('acl') do
+      it { is_expected.to be_installed }
+      it { is_expected.to be_running }
+    end
+  end
+end