test: add test for config_files

kitchen.yml

@@ -182,13 +182,18 @@ suites:
         base:
           '*':
             - rabbitmq
+            - rabbitmq.config_files
       pillars:
         top.sls:
           base:
             '*':
               - rabbitmq
       pillars_from_files:
         rabbitmq.sls: pillar.example
+      dependencies:
+        - name: files
+          path: ./test/salt
+
     verifier:
       inspec_tests:
         - path: test/integration/default

test/integration/default/controls/config.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+control 'rabbitmq configuration' do
+  title 'should match desired lines'
+
+  describe file('/etc/rabbitmq/rabbitmq.conf') do
+    it { should exist }
+    it { should be_file }
+    its('content') { should include '# Config file for rabbitmq' }
+  end
+end

test/salt/files/rabbitmq/rabbitmq.conf

@@ -0,0 +1 @@
+# Config file for rabbitmq