apt-repositories: add some specs

apt-repositories/.kitchen.yml

@@ -17,11 +17,19 @@ provisioner:
 platforms:
   - name: debian-8
 
+verifier:
+  name: serverspec
+
 suites:
   - name: default
     provisioner:
       name: ansible_playbook
       playbook: ./tests/test.yml
+    verifier:
+      patterns:
+      - apt-repositories/tests/spec/main_spec.rb
+      bundler_path: '/usr/local/bin'
+      rspec_path: '/usr/local/bin'
 
 transport:
   max_ssh_sessions: 6

apt-repositories/tests/spec/main_spec.rb

@@ -0,0 +1,21 @@
+require 'net/http'
+require 'uri'
+
+require 'serverspec'
+set :backend, :exec
+
+describe file("/etc/apt/sources.list.d/backports.list") do
+  it { should be_file }
+end
+
+describe file("/etc/apt/preferences.d/backports") do
+  it { should be_file }
+end
+
+describe command("grep 'main contrib non-free' /etc/apt/sources.list.d/backports.list") do
+  its(:exit_status) { should eq 0 }
+end
+
+describe command("grep 'main contrib non-free' /etc/apt/sources.list") do
+  its(:exit_status) { should eq 0 }
+end