rspec- assigns

    it "assigns the requested contact to @contact" do 
      contact = create(:contact)
      get :show, id: contact
      expect(assigns(:contact)).to eq contact
    end

    def set_contact
      @contact = Contact.find(params[:id])
    end

可以用來檢查controller裡面的實體變數，上面那個的話就會檢查show裡面的@contact是不是等於我們傳給他的contact
然後我常常忘了後面有s…

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