在 Rails 3.1 中使用 rspec 测试嵌套资源控制器

Question

我正在尝试为嵌套资源的控制器进行测试。

在routes.rb中嵌套是这样的

resources :cars, :only => [:index, :destroy, :show] do
  resources :car_subscriptions, :only => [:new, :create], :as => :follow_subscriptions
end

我正在尝试最具体地测试创建操作：

describe CarSubscriptionsController do

  def valid_attributes
    {:car_id => '1', :user_id => '2'}
  end

  describe "POST create" do
    describe "with valid params" do
      it "creates a new CarSubscription" do
        expect {
          post :create, :car_id => 1, :car_subscription => valid_attributes
        }.to change(CarSubscription, :count).by(1)
      end

      it "assigns a newly created car_subscription as @car_subscription" do
        post :create, :car_subscription => valid_attributes
        assigns(:car_subscription).should be_a(CarSubscription)
        assigns(:car_subscription).should be_persisted
      end

      it "redirects to the created car_subscription" do
        post :create, :car_subscription => valid_attributes
        response.should redirect_to(CarSubscription.last)
      end
    end
  end

end

它实际上是rails脚本生成的脚手架的一部分。而且我只修改了valid_attributes和第一个'it'中的帖子

输出是这样的：

  1) CarSubscriptionsController POST create with valid params creates a new CarSubscription
     Failure/Error: post :create, :car_id => 1, :car_subscription => valid_attributes
     ActionController::RoutingError:
       No route matches {:car_id=>"1", :car_subscription=>{:car_id=>"1", :user_id=>"2"}, :controller=>"car_subscriptions", :action=>"create"}
     # ./spec/controllers/car_subscriptions_controller_spec.rb:34:in `block (5 levels) in <top (required)>'
     # ./spec/controllers/car_subscriptions_controller_spec.rb:33:in `block (4 levels) in <top (required)>'

所有 'it's 都是同一个错误。

我尝试从 routes.rb 文件中删除 :as => :following_subscriptions，但同样的问题。

我实际上已经拆分了 car_subscriptions 的资源，所以 index 和 destroy 没有嵌套，create 和 new 嵌套在 :cars 中

我不想使用像 answer 这样的硬编码路径，但如果这是唯一的方法，我可以试一试：

{ :post => "/forum_topics/1/forum_sub_topics" }.should route_to(:controller => "forum_sub_topics", :action => "create", :forum_topic_id => 1)

编辑

哦，我的 rake 路线看起来像这样：

car_follow_subscriptions_da POST   /biler/:car_id/car_subscriptions(.:format)                     {:action=>"create", :controller=>"car_subscriptions", :locale=>"da"}

Answer 1

根据rake routes 提供的内容，我猜你应该替换：

 post :create, :car_id => 1, :car_subscription => valid_attributes

与：

 post :create, :car_id => 1, :car_subscription => valid_attributes, :locale => "da"