def fake_login(user=nil, partner=nil, roles=[])
  user= mock("user") unless user
  partner= Factory.stub(:partner) unless partner
  user.stub(:roles).and_return(roles)
  user.stub(:partner).and_return(partner)
  controller.stub(:current_user).and_return(user)
  controller.stub(:current_partner).and_return(partner)
end

def it_should_require_a_logged_in_user(partner=nil, &block)
  it "should succeed when logged in" do
    fake_login(Factory.stub(:user), partner)
    instance_eval(&block)
    if response.redirect?
      response.redirected_to.should_not eql(new_user_session_url)
    else
      response.should be_success
    end
  end
  ...
end