會話rspec的受讓人未能

Question

我的測試失敗和測試報告稱

Failure/Error: assigns(:items).should eq(item) expected: [# Item id: 756, product_name: "Item 1", product_price: 310.25, product_balance: 3, active: 1, created_at: "2012-10-11 20:10:23", updated_at: "2012-10-11 20:10:23"] got: []

能否請你告訴我什麼是錯的，爲什麼測試失敗？

cart_controller.rb文件

class CartController < ApplicationController 
    def index 
    @cart = session[:cart] || {} 

    @items = Item.where(id: @cart.keys) 

    @cart_cost = 0 
    @items.each do | item | 
     @cart_cost += @cart[ item.id.to_s ]*item.product_price 
    end 
    end 
end 

cart_controller_spec.rb

describe CartController do 
    context "when user is logged in" do 

    before (:each) do 
     v = Visitor.create! :username => 'John Doe', :password => '123456' 
     session[:logged_in] = 'logged_in' 

     session[:cart] = {} 
     @cart = session[:cart] 

     @normal_item = Item.create! :product_name => 'Item 1', 
:product_price => '310.25', :product_balance => '3', :active => '1' 
    end 

    describe "GET 'index'" do 
     it "assigns session cart variable as @cart" do 
     get :index 
     @cart[ @normal_item.id ] = 1 

     assigns(:cart).should eq(session[:cart]) 

     item = Item.where(id: @cart.keys) 
     assigns(:items).should eq(item) 
     end 
    end 

    end 

end 

Answer 1

嘗試傳遞會話值作爲第二個參數，以:get，例如：

get :index, {}, { :cart => {}, :logged_in => 'logged_in' } 

這被描述更多細節在A Guide To Testing Rails Applications