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app/models/ app/controllers/ app/helpers/ app/views/account test/functional/ test/unit/ app/models/user.rb app/controllers/account_controller.rb lib/authenticated_system.rb lib/authenticated_test_helper.rb test/functional/account_controller_test.rb app/helpers/account_helper.rb test/unit/user_test.rb test/fixtures/users.yml app/views/account/index.rhtml app/views/account/login.rhtml app/views/account/signup.rhtml db/migrate db/migrate/009_create_users.rb
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As you can see from the output, the generate command created the following: A new model named User and a new controller named AccountController, as well as tests for both of them The views for the login functionality and a new module containing the authentication code, AuthenticatedSystem, in the lib directory A new migration (db/migrate/009_create_users.rb) to bring the new user model into the database, shown in Listing 8-1
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Listing 8-1. ActiveRecord Migration for the Users Table class CreateUsers < ActiveRecord::Migration def self.up create_table "users", :force => true do |t| t.column :login, :string t.column :email, :string t.column :crypted_password, :string, :limit => 40 t.column :salt, :string, :limit => 40 t.column :created_at, :datetime t.column :updated_at, :datetime t.column :remember_token, :string t.column :remember_token_expires_at, :datetime end end def self.down drop_table "users" end end Notice that the password will be stored in the database in an encrypted form. Now let s run the migration to get our database up-to-date. (Don t forget to run rake db:test:clone_structure afterwards to clone the new additions to the test database, too.) $ rake migrate (in /home/george/projects/emporium) == CreateUsers: migrating ===================================================== -- create_table("users", {:force=>true}) -> 0.2946s == CreateUsers: migrated (0.2953s) ============================================ Great! We now have a working authentication framework deployed in our system. If you take a look at the beginning of the new AccountController in app/controllers/ account_controller.rb, you can see that AuthenticatedSystem is mixed in the controller: class AccountController < ApplicationController # Be sure to include AuthenticationSystem in Application Controller instead include AuthenticatedSystem ...
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However, we want the authentication system to be available to other controllers as well, so let s move the include line from AccountController to ApplicationController in app/controllers/application.rb: class ApplicationController < ActionController::Base include AuthenticatedSystem private def initialize_cart ... As ApplicationController is the parent class of all our controllers, authentication functionality is now provided throughout our application. It s only a matter of putting it into action where necessary. Since we want to make the tests provided by the plugin work as well, we also move the following line from the AccountControllerTest class in test/functional/account_controller_test.rb to the beginning of the Test::Unit::TestCase class in test/test_helper.rb: include AuthenticatedTestHelper With our authentication framework in place, we re ready to implement our authentication user stories.
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Implementing the User Stories
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As usual, we will take the TDD approach while implementing the user authentication system. For this sprint, we will use integration tests, as we have done in previous chapters.
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Implementing the Log In User Story
We start the grunt work by creating a new integration test case for the login functionality. $ script/generate integration_test authentication exists test/integration/ create test/integration/authentication_test.rb First, we want to test that when George tries to go to the admin section of the site, he gets redirected to the login page. Open test/integration/authentication_test.rb and create the DSL for our integration test, as shown in Listing 8-2.
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Listing 8-2. First Version of the Authentication Integration Test require "#{File.dirname(__FILE__)}/../test_helper" class AuthenticationTest < ActionController::IntegrationTest def test_successful_login george = enter_site(:george) george.tries_to_go_to_admin end private module BrowsingTestDSL include ERB::Util attr_writer :name def tries_to_go_to_admin get "/admin/book/new" assert_response :redirect assert_redirected_to "/account/login" end end def enter_site(name) open_session do |session| session.extend(BrowsingTestDSL) session.name = name yield session if block_given end end end Here, the most interesting part is in the tries_to_go_to_admin method. This is where we test that the first part of the story goes as planned: George is redirected to the login page when trying to access admin pages. If you run the test, you get the following failure: $ ruby test/integration/authentication_test.rb
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Loaded suite test/integration/authentication_test Started F Finished in 1.44942 seconds. 1) Failure: test_successful_login(AuthenticationTest) [test/integration/authentication_test.rb:17:in 'tries_to_go_to_admin' test/integration/authentication_test.rb:6:in 'test_successful_login' /usr/local/lib/ruby/gems/1.8/gems/actionpack1.12.1/lib/action_controller/integration.rb:427:in 'run']: Expected response to be a <:redirect>, but was <200> 1 tests, 1 assertions, 1 failures, 0 errors It seems the redirection is not working, which should come as no surprise. Now it s time to put the authentication plugin to work.
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