posts_controller_shared_mock.rb

describe PostsController do
  it "should show a published post on GET show" do
    post = stub('a post', :to_param  => '1')
    post.expects(:published? => true)
    Post.expects(:find).with(post.to_param).returns(post)
    get :show, :id => post.to_param
    should render_template(:show)
    should assign_to(:post).with(post)
  end
end

describe "/posts/show" do
  it "should a post" do
    assigns[:post] = stub('a post', :published? => true, :title => 'a title')
    render '/posts/show'
    template.should have_tag('h1', assigns[:post].title)
  end
end