Controller and Spec file

something.rb

# --- SPEC FILE ----
  describe "#create" do
    before do
      @create_hash = { 
                      category_id: category.id,
                      section_id:  section.id,
                      listing: FactoryGirl.attributes_for(:listing)
                      }
    end
    subject { post :create, @create_hash}
    context "not logged in" do
      it_should_behave_like "Unauthorized action"
    end
    context "Logged is as a user" do
      before(:each) { sign_in user }
      it "should create a new listing" do
        expect { subject }.to change(Listing, :count).by(1)
      end
      specify { subject; assigns[:listing].section_id.should == section.id }
    end
  end



# ---- CONTROLLER ACTION ----

  def create
    @listing = Section.find(params[:section_id]).listings.create(params[:listing])
    @listing.user = current_user
    @listing.save
    respond_with [@listing.section.category, @listing.section, @listing]
  end