first some tests....

gistfile1.rb

require 'spec_helper'

describe CatsController do

  describe "#index" do
    it "should display cats" do
      get :index
      response.status.should eql(200)
    end
  end

  describe "#create" do
    it "should create new cat" do
      lambda do
        post :create, :cat => {:name => "test-hitler-looking-cat", :url => "http://lolcat.com/test.png"}
        response.status.should eql(302)
      end.should change(Cat, :count).by(1)
    end
  end

end

gistfile3.rb

  # new route in config/routes.rb
  resources :cats

gistfile4.rb

# some controller code 


class CatsController < ApplicationController


  def index
   @cats = Cat.all
  end

  def create
    @cat = Cat.new(params[:cat])
    if @cat.save
      redirect_to cats_path
    else
      render :action => :index
    end
  end

end

gistfile5.txt

Pending:
  Application should earn loads of money
    # Not Yet Implemented
    # ./spec/application_spec.rb:6

Finished in 0.10377 seconds
5 examples, 0 failures, 1 pending

oh fails :(

Failures:

  1) CatsController#index should display cats
     Failure/Error: get :index
     ActionController::RoutingError:
       No route matches {:controller=>"cats"}
     # ./spec/controllers/cats_controller_spec.rb:7

  2) CatsController#create should create new cat
     Failure/Error: post :create, :cat => {:name => "test-hitler-looking-cat", :url => "http://lolcat.com/test.png"}
     ActionController::RoutingError:
       No route matches {:cat=>{:url=>"http://lolcat.com/test.png", :name=>"test-hitler-looking-cat"}, :action=>"create", :controller=>"cats"}
     # ./spec/controllers/cats_controller_spec.rb:15
     # ./spec/controllers/cats_controller_spec.rb:14

Finished in 0.11783 seconds
6 examples, 2 failures, 2 pending