games_controller_spec.rb

require 'spec_helper'

describe GamesController do
  describe 'POST "create"' do
    subject(:response) { post :create, params }

    context 'valid parameters provided' do
      let(:params) { { game: FactoryGirl.attributes_for(:game) } }

      specify { expect { subject }.to change(Game, :count).by 1 }
      
      # This fails - assigns(:game) is nil so the route comes out like /games//score
      it { should redirect_to score_game_path(assigns(:game)) }
      
      # This passes - subject evaluated first?
      it { subject.should redirect_to score_game_path(assigns(:game)) }

      # This passes - named subject gets evaluated first too
      it 'redirects to the newly created game' do
        response.should redirect_to score_game_path(assigns(:game))
      end

      it { should set_flash :notice }
    end
  end
end