Add testing files

.kitchen.yml

@@ -0,0 +1,20 @@
+driver:
+  name: vagrant
+
+provisioner:
+  name: chef_zero
+
+platforms:
+  - name: centos-6.7
+  - name: centos-7.1
+  - name: ubuntu-12.04
+    run_list:
+      - recipe[apt::default]
+  - name: ubuntu-14.04
+    run_list:
+      - recipe[apt::default]
+
+suites:
+  - name: default
+    run_list:
+      - recipe[whitelist-node-attrs::default]

.travis.yml

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+sudo: false
+cache: bundler
+language: ruby
+bundler_args: --without kitchen_common kitchen_vagrant kitchen_cloud
+rvm:
+  - 2.0
+  - 2.1
+  - 2.2
+script:
+  - bundle exec foodcritic -f any . --tags ~FC005 --tags ~FC015
+  - bundle exec rubocop
+  - bundle exec rspec --color --format progress

Berksfile

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+source 'https://supermarket.chef.io'
+
+metadata
+
+group :integration do
+  cookbook 'apt'
+end

Gemfile

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+source 'https://rubygems.org'
+
+group :lint do
+  gem 'foodcritic', '~> 4.0'
+  gem 'rubocop', '~> 0.33'
+  gem 'rake'
+end
+
+group :unit do
+  gem 'berkshelf',  '~> 3.2'
+  gem 'chefspec',   '~> 4.3'
+end
+
+group :kitchen_common do
+  gem 'test-kitchen', '~> 1.4'
+end
+
+group :kitchen_vagrant do
+  gem 'kitchen-vagrant', '~> 0.18'
+end
+
+group :kitchen_cloud do
+  gem 'kitchen-digitalocean'
+  gem 'kitchen-ec2'
+end