feat(centos-6): reshape formula and tests for this platform

* Close #104

.travis.yml

@@ -34,7 +34,7 @@ env:
     - INSTANCE: default-debian-8-2017-7-py2
     - INSTANCE: default-ubuntu-1604-2017-7-py2
     # TODO: Enable after improving the formula to work with other than `systemd`
-    # - INSTANCE: default-centos-6-2017-7-py2
+    - INSTANCE: default-centos-6-2017-7-py2
     - INSTANCE: default-fedora-28-2017-7-py2
     - INSTANCE: default-opensuse-leap-42-2017-7-py2
 

kitchen.yml

@@ -64,7 +64,7 @@ platforms:
   - name: centos-6-2017-7-py2
     driver:
       image: netmanagers/salt-2017.7-py2:centos-6
-      run_options: '--entrypoint /sbin/init'
+      run_command: /sbin/init
   - name: fedora-28-2017-7-py2
     driver:
       image: netmanagers/salt-2017.7-py2:fedora-28

pillar.example

@@ -8,10 +8,16 @@ template:
   # Using bash package and udev service as an example. This allows us to
   # test the template formula itself. You should set these parameters to
   # examples that make sense in the contexto of the formula you're writing.
+  {%- if grains.osfinger == 'CentOS-6' %}
+  pkg: cronie
+  service:
+    name: crond
+  {%- else %}
   pkg: bash
-  config: /etc/template-formula.conf
   service:
     name: systemd-udevd
+  {%- endif %}
+  config: /etc/template-formula.conf
 
   tofs:
     # The files_switch key serves as a selector for alternative

test/integration/default/controls/packages_spec.rb

@@ -1,7 +1,13 @@
+# Overide by OS
+package_name = 'bash'
+if os[:name] == 'centos' and os[:release].start_with?('6')
+  package_name = 'cronie'
+end
+
 control 'Template package' do
   title 'should be installed'
 
-  describe package('bash') do
+  describe package(package_name) do
     it { should be_installed }
   end
 end

test/integration/default/controls/services_spec.rb

@@ -1,3 +1,9 @@
+# Overide by OS
+service_name = 'systemd-udevd'
+if os[:name] == 'centos' and os[:release].start_with?('6')
+  service_name = 'crond'
+end
+
 # Temporary `if` due to `opensuse-leap-15` bug re: `service`
 if os[:name] == 'suse'
   puts "[Skip `service`-based tests due to `opensuse-leap-15` detection bug (see https://github.com/inspec/train/issues/377)]"
@@ -6,7 +12,7 @@ control 'Template service' do
   impact 0.5
   title 'should be running and enabled'
 
-  describe service('systemd-udevd') do
+  describe service(service_name) do
     it { should be_enabled }
     it { should be_running }
   end