gistfile1.rb

describe :note_for do
  it 'give notes for the project' do
    CategoryProject.create(:project      => project,
                           :category     => category,
                           :description  => 'test')

    params = { :category => category }

    project.notes.create params.merge(:value => 8)
    2.times{ project.notes.create params.merge(:value => 3) }

    project.note_for(category).should == 4.7
  end
end