Chefspec example

gistfile1.rb

spec_helper.rb
Rspec.configure do |config|
  def converge(recipe_name)
    chef_run = ChefSpec::ChefRunner.new(:cookbook_path => File.dirname(__FILE__))
    chef_run.coverge recipe_name
    chef_run
  end
end

default.rb (attribute file)
default[:tmpreaper][:time] = "7d"

if search(:node, "role:rails_utility").length > 0
  default[:tmpreaper][:time] = "3d"
end

default_spec.rb
describe 'tmpreaper::default' do

    before(:all) do
      @chef_run = converge "tmpreaper::default"
    end

    describe "attributes" do

      it "should set the correct values by default" do
        #pending("Waiting for response back from gem author why mocks aren't working")
        @chef_run.node.tmpreaper[:time].should == "7d"
      end

      it "should set the correct values when there are nodes with the rails_utility role" do
        @chef_run.node.tmpreaper[:time].should == "3d"
      end
    end
end