controller_macros.rb

module ControllerMacros
	def should_set_session(key, options = {})
		it "should set session[:#{key}]" do
			value = get_value_from_options(options)

			if value
				session[key].should == value
			else
				session[key].should_not be_nil
			end
		end
	end

	private

	def get_value_from_options(options)
		value = nil
		if options.has_key?(:with)
			value = options[:with]
			if value.is_a?(Symbol)
				value = self.instance_variable_get("@#{value}")
				value = value.send(options[:method]) if options.has_key?(:method)
			end
		end

		value
	end
end

output

NoMethodError in 'SessionsController login POST request successful administrator should set session[:user_id]'
undefined method `get_value_from_options' for #<Spec::Rails::Example::ControllerExampleGroup::Subclass_1::Subclass_2::Subclass_2::Subclass_1::Subclass_1:0x1033dc828>

sessions_controller_spec.rb

describe 'login' do
	context 'POST request' do
		context 'successful' do
			context 'administrator' do
				before :each do
					@user = stub_user(user_hash)
					User.should_receive(:authenticate).and_return([@user.id, Messages::LOGIN_SUCCESSFUL])
					User.should_receive(:find_by_id).and_return(@user)
					@user.should_receive(:is_administrator?).and_return(true)

					do_post(:login, {:email => @user.email, :password => @user.password})
				end
			
				should_set_session(:user_id, :with => :user, :method => :id)
			end # context 'administrator'
		end # context 'successful'
	end # context 'POST request'
end # describe 'login'