posts_controller_spy_basic.rb

describe PostsController do
  it "should show the given post on GET show" do
    post = stub('a post', :to_param => '1')
    Post.stubs(:find => post)

    get :show, :id => post.to_param

    Post.should have_received(:find).with(post.to_param)
    should render_template(:show)
    should assign_to(:post).with(post)
  end
end