spec_using_factory.rb

# spec/models/movie_spec.rb

describe Movie do
  it 'should include rating and year in full name' do
    movie = FactoryGirl.build(:movie, :title => 'Milk', :rating => 'R')
    movie.name_with_rating.should == 'Milk (R)'
  end
end

# or if you mix in FactoryGirl's syntax methods (see FactoryGirl README):

describe Movie do
  subject { create :movie, :title => 'Milk', :rating => 'R' }
  its :name_with_rating { should == 'Milk (R)' }
end