(urgent) Testing Controller of Rails

Hi,

I am a new comer of testing on rails .
I am trying to testing my controller, and read a lot of testing using
rspec
and shoulda.
can anyone give me some examples about those rspec.
cuz sometime i did not understand how to use rspec for the controller.

def create
@user = User.new(params[:user])

@user.is_admin = false
@user.enabled = false

if @user.save
  redirect_to :action => "confirm"
else
  @cultures  = Culture.where(:enabled => true)
  @languages = Language.where(:enabled => true)
  render "new"
end

end

def show
redirect_to :action => “edit”

end

if my controller like that… how can i test by using rspec… please help