如何模擬登錄進行控制器測試？

Question

我有一個SearchesController，需要用戶登錄才能完成任務。

我想寫一個rspec幫助函數login來模擬登錄進行控制器測試。 （注意：我將分別處理集成/請求規範。）我的嘗試沒有成功：ApplicationController中的logged_in?方法返回false。

問題：如何編寫'登錄'助手？

這裏的RSpec的控制器測試：

# file: spec/controllers/searches_controller_spec.rb 
require 'spec_helper' 
require 'controllers_helper' 
describe SearchesController do 
    include ControllersHelper 

    describe "GET index" do 

    it 'without login renders login page' do 
     get :index 
     response.should redirect_to(login_path) 
    end 

    it 'with login finds searches belonging to user' do 
     me = FactoryGirl.create(:user) 
     my_searches = FactoryGirl.create_list(:search, 2, :user => me) 
     not_me = FactoryGirl.create(:user) 
     not_my_searches = FactoryGirl.create_list(:search, 2, :user => not_me) 

     login(me) # want to define this in spec/controllers_helper.rb 
     get :index 
     assigns(:searches).should =~ my_searches 
    end 
    end 
end 

這裏的控制器：

# file: app/controllers/searches_controller.rb 
class SearchesController < ApplicationController 

    def index 
    unless logged_in? 
     redirect_to login_path, :alert => "You must be logged in to access this page." 
    else 
     @searches = Search.where(:user_id => current_user.id) 
     respond_to do |format| 
     format.html 
     format.json { render json: @searches } 
     end 
    end 
    end 

end 

而這裏的ApplicationController的代碼。請注意，current_user = x具有記錄x in的效果，它很簡單：它設置@current_user和session [：user_id]。

# file: app/controllers/application_controller.rb 
class ApplicationController < ActionController::Base 
    protect_from_forgery 
    force_ssl 

    protected 

    def current_user 
    @current_user ||= User.find_by_id(session[:user_id]) 
    end 

    def current_user=(user) 
    @current_user = user 
    session[:user_id] = user && user.id 
    end 

    def logged_in? 
    !!@current_user 
    end 

    def require_login 
    unless logged_in? 
     redirect_to login_path, :alert => "You must be logged in to access this page." 
    end 
    end 

    helper_method :current_user, :logged_in?, :require_login 
end 

Answer 1

我可能之前已經說過，但如果堆棧溢出了徽章回答了自己的問題，我有徽章的很多！ :)

好的，要回答這個問題，你需要看看documentation for ActionController::TestCase。當你這樣做，你會發現，它建立綁定：

@controller 
@request 
@response 

所以在OP給出了具體的控制器，寫login方法很簡單：

# file: spec/controllers_helper.rb 
module ControllersHelper 
    def login(user) 
    @controller.send(:current_user=, user) 
    end 
end 

（難道我聽到有人說再次RTFM？我認爲是這樣...）