Rspec sample

gistfile1.rb

  describe "DELETE destroy" do                                                                                                                                                                   
    let!(:card) { Card.create! valid_attributes }                                                                                                                                                
    before do                                                                                                                                                                                    
      expect {                                                                                                                                                                                   
        delete :destroy, {:id => card.to_param}                                                                                                                                                  
      }.should change(Card, :count).by(-1)                                                                                                                                                       
    end                                                                                                                                                                                          
    it { response.should redirect_to(cards_url) }                                                                                                                                                
  end