测试 Rails 3 控制器时出现一些意外错误

Question

我有一个这样定义的服务模型：

class Service < ActiveRecord::Base
  attr_accessible :service_type #, ...

  SERVICE_TYPES = {
    :restaurant => "restaurant",
    :retailer   => "retailer"
  }

  SERVICE_TYPES.values.each do |method|
   define_method method.pluralize.to_sym do
      where(:service_type => method)
   end
  end

  def domestic
    where(:country => 'USA')
  end

  def international
    where("country != 'USA'")
  end
end

我决定不对不同的服务使用传统的 STI 模式，因为它们都具有相同的属性，并且在其他方​​面表现相同。有一个父模型，但它仅用于规范化目的，Web 用户永远不需要知道它。就应用程序而言，存在服务类型以及这些类型下的特定服务。所以基本上我想要这样的 URL：

http://myapp/services        # <- Lists all service types
http://myapp/restaurants     # <- Lists all restaurant-type services
http://myapp/restaurants/foo # <- Lists a specific restaurant (using friendly_id gem)
http://myapp/retailers       # <- Lists all retailer-type services
http://myapp/retailers/bar   # <- Lists a specific retailer

所以我创建了一个像这样的路由模式：

controller :services, :via => [:get] do 
  match '/services'          => :index
  match '/:service_type'     => :service_index, :as => 'service_type', :constraints => { :service_type => Regexp.new(Service::SERVICE_TYPES.values.map{|s| Regexp.escape(s.pluralize) }.join('|')) }
  match '/:service_type/:id' => :show,          :as => 'service',      :constraints => { :service_type => Regexp.new(Service::SERVICE_TYPES.values.map{|s| Regexp.escape(s.pluralize) }.join('|')) }
end

这让我明白了

    services GET  /services(.:format)                              {:controller=>"services", :action=>"index"}
service_type GET  /:service_type(.:format)                         {:service_type=>/restaurants|retailers/, :controller=>"services", :action=>"service_index"}
     service GET  /:service_type/:id(.:format)                     {:service_type=>/restaurants|retailers/, :controller=>"services", :action=>"show"}

控制器被定义为

class ServicesController < ApplicationController
  def index
    @service_types = Service::SERVICE_TYPES.values
    @page_title = "Services"
  end

  def service_index
    @service_type  = params[:service_type]
    @domestic      = Service.send(@service_type).domestic
    @international = Service.send(@service_type).international
    @page_title    = @service_type.capitalize
  end

  def show
    @service = Service.find(params[:id])
    @page_title = "Services - #{@service.name}"
  end
end

当我在浏览器中测试它时，这一切都按预期工作。但是当我尝试在 Rspec2 中运行集成测试时，我遇到了一些非常意外的行为。

require 'spec_helper'

describe ServicesController do
  describe "GET 'index'" do
    it "should be successful" do
      get :index
      response.should be_success
    end

    it "should have the right title" do
      get :index
      response.should have_selector(
        "title", 
        :content => "#{@base_title}Services"
      )
    end

    it "should have a link to each service" do
      get :index
      Service::SERVICE_TYPES.values.each do |service_type|
        response.should have_selector("a", :href => service_type_path(service_type.pluralize),
                                           :content => service_type.pluralize)
      end
    end
  end

  describe "GET 'service_index'" do
    Service::SERVICE_TYPES.values.each do |service_type|
      context service_type.pluralize do
        it "should be successful" do
          get :service_index, :service_type => service_type.pluralize
          response.should be_success
        end

        it "should have the right title" do
          get :service_index, :service_type => service_type.pluralize
          response.should have_selector(
            "title", 
            :content => "#{@base_title}#{service_type.pluralize.capitalize}"
          )
        end

        it "should have a link to each service" do
          get :service_index, :service_type => service_type.pluralize
          Service.send(service_type.pluralize).each do |service|
            response.should have_selector("a", :href => service_path(service_type.pluralize, service),
                                               :content => service.name)
          end
        end
      end
    end
  end

  describe "GET 'show'" do
    it "should be successful" do
      get 'show'
      response.should be_success
    end
  end
end

get 操作似乎运行成功，因为 “应该成功” 测试全部通过，但其他操作失败，因为它无法在页。奇怪的是，返回的 HTML 转储似乎不是来自我的应用程序。

  1) ServicesController GET 'index' should have the right title
     Failure/Error: response.should have_selector(
       expected following output to contain a <title>Services</title> tag:
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
     # ./spec/controllers/services_controller_spec.rb:12:in `block (3 levels) in <top (required)>'

  2) ServicesController GET 'index' should have a link to each service
     Failure/Error: response.should have_selector("a", :href => service_type_path(service_type.pluralize),
       expected following output to contain a <a href='/restaurants'>Restaurants</a> tag:
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
     # ./spec/controllers/services_controller_spec.rb:21:in `block (4 levels) in <top (required)>'
     # ./spec/controllers/services_controller_spec.rb:20:in `each'
     # ./spec/controllers/services_controller_spec.rb:20:in `block (3 levels) in <top (required)>'

  3) ServicesController GET 'service_index' restaurants should have the right title
     Failure/Error: response.should have_selector(
       expected following output to contain a <title>Restaurants</title> tag:
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
     # ./spec/controllers/services_controller_spec.rb:37:in `block (5 levels) in <top (required)>'

  4) ServicesController GET 'service_index' restaurants should have a link to each service
     Failure/Error: response.should have_selector("a", :href => service_path(service_type.pluralize, service),
       expected following output to contain a <a href='/restaurants/foo'>Foo</a> tag:
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
     # ./spec/controllers/services_controller_spec.rb:46:in `block (6 levels) in <top (required)>'
     # ./spec/controllers/services_controller_spec.rb:45:in `block (5 levels) in <top (required)>'

如果这确实是一个失败，我期望看到的是我的 HTML 应用程序模板的完整转储，该模板以 HTML 5 标记。相反，我只得到标记为 HTML 4 的页面的文档类型。

任何想法是什么会导致这样的情况吗？

作为次要问题，我无法找到任何方法来打开 Webrat 中的日志记录以查看实际发生的 HTTP 活动。我怎样才能做到这一点？

Answer 1

是的，没关系。我是个白痴，忘记将 render_views 放入我的测试中这就是为什么它没有渲染视图。