Controller test for default resource using Shoulda and Factory_Girl

Controller test for default resource using Shoulda and Factory_Girl

# posts_controller_test.rb

require 'test_helper'

class PostsControllerTest < ActionController::TestCase
  context "on GET to :index" do
    setup do
      @first_post   = Factory(:post, :title => "My first post")
      @second_post  = Factory(:post, :title => "My second post")
      get :index
    end
    should_respond_with :success
    should_render_template :index
    should_assign_to :posts
    should_not_set_the_flash
  end

  context "on GET to :new" do
    setup { get :new }
    should_respond_with :success
    should_render_template :new
    should_not_set_the_flash
  end

  context "on POST to :create" do
    setup { post :create, :post => {:title => 'My new post' } }
    should_assign_to :post
    should_redirect_to("the new post page") { post_path(assigns :post) }
    should_set_the_flash_to(/created/i)
  end

  context "on GET to :show" do
    setup do
      @post = Factory(:post)
      get :show, :id => @post.id
    end
    should_respond_with :success
    should_render_template :show
    should_assign_to :post
    should_not_set_the_flash
  end

  context "on GET to :edit" do
    setup do
      @post = Factory(:post)
      get :edit, :id => @post.id
    end
    should_respond_with :success
    should_render_template :edit
    should_assign_to :post
    should_not_set_the_flash
  end

  context "on PUT to :update" do
    setup do
      @post = Factory(:post)
      put :update, :id => @post.id, :post => {:name => 'asian' }
    end
    should_assign_to :post
    should_redirect_to("the updated post page") { post_path(assigns :post) }
    should_set_the_flash_to(/updated/i)
  end

  context "on DELETE to :destroy" do
    setup do
      @post = Factory(:post)
      assert_difference('Post.count', -1) do 
        delete :destroy, :id => @post.id
      end
    end
    should_assign_to :post
    should_redirect_to("the posts page") { posts_path }
    should_not_set_the_flash
  end
end