[tests] Use beaker+docker for acceptance tests

Beaker together with docker is a very fast way to do
acceptance testing.
This commit adds basic beaker/docker support:

- Add a debian jessie nodeset
- Test if the module applies idempotentially, so it doesn't
  change resources on a second run with the same parameters.

https://github.com/puppetlabs/beaker/blob/master/docs/Docker-Support.md

.gitignore

@@ -5,6 +5,7 @@
 /spec/fixtures/modules/*
 !/spec/fixtures/modules/apt
 !/spec/fixtures/modules/apt/*
+/log
 /.vagrant/
 /.bundle/
 /coverage/

Gemfile

@@ -11,3 +11,10 @@ group :test do
   gem "rspec-puppet-facts"
   gem "mocha"
 end
+
+group :system_tests do
+  gem 'beaker',              :require => false
+  gem 'beaker-rspec',        :require => false
+  gem 'beaker_spec_helper',  :require => false
+  gem 'serverspec',          :require => false
+end

README

@@ -576,11 +576,35 @@ To run pupept rspec tests:
     bundle install --path vendor/bundle
     bundle exec rake spec
 
+Verbose Output:
+
+    bundle exec rake spec SPEC_OPTS='--format documentation'
+
 Using different facter/puppet versions:
 
     FACTER_GEM_VERSION=1.6.10 PUPPET_GEM_VERSION=2.7.23 bundle install --path vendor/bundle
     bundle exec rake spec
 
+Acceptance Tests
+----------------
+
+At the moment, we use [beaker together with docker](https://github.com/puppetlabs/beaker/blob/master/docs/Docker-Support.md)
+to do acceptance testing.
+Be sure to have a recent docker version installed.
+
+List configured nodesets:
+
+    bundle exec rake beaker_nodes
+
+Run tests on default node (Debian Jessie):
+
+    bundle exec rake beaker
+
+Run different nodeset:
+
+    BEAKER_set="debian-8-x86_64-docker" bundle exec rspec spec/acceptance/*_spec.rb
+
+
 Licensing
 =========
 

spec/acceptance/apt_spec.rb

@@ -0,0 +1,21 @@
+require 'spec_helper_acceptance'
+
+describe 'apt class' do
+
+  context 'default parameters' do
+    it 'should work idempotently with no errors' do
+      pp = <<-EOS
+        class { 'apt': }
+      EOS
+
+      # Run it twice and test for idempotency
+      apply_manifest(pp, :catch_failures => true)
+      apply_manifest(pp, :catch_changes  => true)
+    end
+
+    describe package('apt') do
+      it { is_expected.to be_installed }
+    end
+
+  end
+end

spec/acceptance/nodesets/debian-8-x86_64-docker.yml

@@ -0,0 +1,19 @@
+HOSTS:
+  debian-8-x64:
+    platform: debian-8-amd64
+    image: debian:8
+    hypervisor: docker
+    docker_preserve_image: true
+    docker_cmd: '["/sbin/init"]'
+    docker_image_commands:
+      - 'apt-get install -y wget locales-all puppet git'
+      - 'rm -f /usr/sbin/policy-rc.d'
+
+CONFIG:
+  type: foss
+  #log_level: verbose
+  #log_level: debug
+
+ssh:
+  password: root
+  auth_methods: ["password"]

spec/acceptance/nodesets/default.yml

@@ -0,0 +1 @@
+debian-8-x86_64-docker.yml

spec/spec_helper_acceptance.rb

@@ -0,0 +1,18 @@
+require 'beaker-rspec'
+
+RSpec.configure do |c|
+  module_root = File.expand_path(File.join(File.dirname(__FILE__), '..'))
+  module_name = module_root.split('-').last
+
+  # Readable test descriptions
+  c.formatter = :documentation
+
+  # Configure all nodes in nodeset
+  c.before :suite do
+    # Install module and dependencies
+    puppet_module_install(:source => module_root, :module_name => module_name)
+    hosts.each do |host|
+      shell('git clone https://gitlab.com/shared-puppet-modules-group/common.git /etc/puppet/modules/common')
+    end
+  end
+end