gistfile1.rb

context "when :allow_destroy is enabled" do
  before do
    @person = Person.new
    @person.favorites.build(:title => "Ice Cream")
    @person.favorites.build(:title => "Jello")
    @attributes = {
      "0" => { "title" => "Jello", "_destroy" => "true" }
    }
    @person.favorites_attributes = @attributes
  end

  it "updates the existing attributes on the association" do
    @person.favorites.size.should == 1
    @person.favorites.first.title == "Ice Cream"
  end

end