all_servers_spec.rb

require 'spec_helper'
require 'yaml'

vagrant_yaml = YAML.load_file('Vagrantfile.yaml')
vagrant_yaml['hosts'].each do |hostname, config|

  describe "#{hostname}" do
    let(:node) { hostname }
    let(:facts) do
      {:environment => 'dev'}
    end

    it { is_expected.to contain_class('openstack_infra::server') }
  end
end