gistfile1.rb

require 'spec_helper'

describe 'test_mycookbook::doit' do
  iaas_providers = [ 'ec2' ]
  iaas_providers.each do |provider|
    context "Test on cloud provider #{provider}" do

      let(:chef_run) { ChefSpec::Runner.new(platform: 'ubuntu', version: '12.04').converge('test_mycookbook::doit') }

      it 'should do the thing' do
        expect(chef_run).to doit('thing')
      end
    end
  end
end

See original revision for issue - now update to work.