error of render

Hi I test < render "home_simple", :layout => "simple"> response.should render_template("home_simple")

How can i test the < render "home" > response.should render_template("home")

it gives me error as : expecting <"home"> but rendering with <"">.

  def home     if !current_user       render "home_simple", :layout => "simple"     else       render "home"     end   end

thanks for your help