Tidying scaffolded Rails controller spec with subject/let

Question

I was just looking at a standard scaffolded Rails controller spec, and tried to get it to use subject or let blocks, and failed miserably ... can subject or let tidy controller specs the same as it would a model spec?

require 'spec_helper'
describe ProjectsController do
 def valid_attributes
 {}
 end
 def valid_session
 {}
 end
 before(:each) do
 @project = Project.create! valid_attributes
 end
 describe "GET index" do
 it "assigns all projects as @projects" do
 get :index, {}, valid_session
 assigns(:projects).should eq([@project])
 end
 end
 describe "GET show" do
 it "assigns the requested project as @project" do
 get :show, {:id => @project.to_param}, valid_session
 assigns(:project).should eq(@project)
 end
 end
 #etc
end

Answer 1

Check the answer from Pavel Druzyak for a different question. It answers your question as well.

Your code can be refactored to this;

describe ProjectsController do
 let(:project) { Project.create! }
 describe "GET index" do
 before(:each) { get :index }
 it { should respond_with(:success) }
 it { should assign_to(:projects).with([project]) }
 end
 describe "GET show" do
 before(:each) { get :show, {:id => @project.to_param} }
 it { should respond_with(:success) }
 it { should assign_to(:projects).with(project) }
 end
end