Rails 5.2 集成测试中的会话未持续存在

Question

我有一个多租户应用程序，它使用 Apartment 进行 postgreSQL 模式，使用 Devise 进行用户身份验证。在我尝试编写一些集成测试之前，一切都运行顺利。

这是我目前所拥有的精简版（如需更多信息，请随时询问）：

# test/support/sign_in_helper.rb
module SignInHelper
  def sign_in_as(name)
    sign_in users(name)
  end
end


# test/test_helper.rb
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }

#...

class ActionDispatch::IntegrationTest
  include Devise::Test::IntegrationHelpers
  include SignInHelper
end


# test/system/article/post_test.rb
require "application_system_test_case"

class Article::PostTest < ApplicationSystemTestCase
  test 'post a new document' do
    sign_in_as :will
    visit articles_path

    click_on 'Add New Article' # redirected to login page after clicking this button
    fill_in 'Name', with: 'Hello world!'
    fill_in 'Content', with: 'Yes yes'

    click_on 'Create Article'
    assert_select 'h1', /Hello world!/
  end
end

articles_path 需要经过身份验证的用户，所以我知道登录助手可以正常工作。然而，每当我尝试转到另一个 link 时，用户突然未通过身份验证。

我像这样猴子修补了 Devise 的 authenticate_user! 方法：

def authenticate_user!(*args)
  byebug
  super
end

并确认 warden.authenticated? 为 articles_path 返回了 true，但 false 随后尝试导航到 new_article_path。

我在集成测试类型、控制器和系统中都注意到了这种行为。但是，在开发环境中使用此应用程序时，这不是问题。

最令人沮丧的是，我有一个不同的应用程序，它似乎具有与此应用程序相同的设置，但在测试时不会出现此身份验证问题。

我该如何调试这个问题？

系统

Rails: 5.2.2
设计：4.5.0
水豚：3.13.2

更新 1（2019 年 2 月 4 日）

这是@BKSpurgeon 要求的文章控制器

# app/controllers/articles_controller.rb
class ArticlesController < ApplicationController
  before_action :set_article, only: [:show, :edit, :update, :archive]

  def index
    @articles = Article.where(archived: false)
  end

  def show
  end

  def new
    @article = Article.new
  end

  def create
    @article = Article.new(article_params)

    if @article.save
      redirect_to @article, notice: 'Your article was successfully created.'
    else
      flash[:error] = @article.errors.full_messages.to_sentence
      render :new
    end
  end

  def edit
  end

  def update
    if @article.update(article_params)
      redirect_to articles_path, notice: 'Your article was successfully updated.'
    else
      flash[:error] = @article.errors.full_messages.to_sentence
      render :edit
    end
  end

  def archive
    if @article.archive!
      redirect_to articles_path, notice: 'Your article was successfully archived.'
    else
      render :edit
    end
  end

  private
    def set_article
      @article = Article.find(params[:id])
    end

    def article_params
      params.require(:article).permit(:name, :content, :archived)
    end
end

更新 2（2019 年 2 月 4 日）

我写了一个简单的中间件，放在Warden之前调试：

# lib/debug_warden_middleware.rb
class DebugWardenMiddleware
  def initialize(app)
    @app = app
  end

  def call(env)
    @status, @headers, @response = @app.call(env)
    if env['warden'].present?
      puts "User (#{env['warden'].user.present?}), Class: #{@response.class.name}"
    end
    return [@status, @headers, @response]
  end
end

# config/application.rb
#...
module AppName
  class Application < Rails::Application
    # ...

    config.middleware.insert_before Warden::Manager, DebugWardenMiddleware
  end
end

而且我注意到 warden 似乎会在每次请求（包括资产请求）后清除其用户：

bin/rails test:system
Run options: --seed 39763

# Running:

Capybara starting Puma...
* Version 3.9.1 , codename: Private Caller
* Min threads: 0, max threads: 4
* Listening on tcp://127.0.0.1:57466
User (true), Uri: ActionDispatch::Response::RackBody
User (false), Uri: Sprockets::Asset
User (false), Uri: Sprockets::Asset
User (false), Uri: Sprockets::Asset
User (false), Uri: ActionDispatch::Response::RackBody
User (false), Uri: ActionDispatch::Response::RackBody
User (false), Uri: Sprockets::Asset
[Screenshot]: tmp/screenshots/failures_test_post_a_new_article.png
E

Error:
Agenda::PostTest#test_post_a_new_article:
Capybara::ElementNotFound: Unable to find field "Name"
    test/system/article/post_test.rb:9:in `block in <class:PostTest>'


bin/rails test test/system/article/post_test.rb:4

附带说明一下，我同时使用 Sprockets 和 Webpacker。

Answer 1

好吧，在 @BKSpurgeon (in a chat message) and @Old Pro 建议我尝试在单独的应用程序中重现问题与大家分享后，我偶然发现了答案。

因为这个应用程序是多租户的并且使用公寓 gem，所以我的测试设置有点复杂。不幸的是，我没有包括其中的一些设置，认为它是无关紧要的 (big mistake, huge!)。直到我尝试重新创建我的应用程序时，我才注意到这个缺陷。这是我使用的测试设置：

# test/test_helper.rb
ENV['RAILS_ENV'] ||= 'test'
require_relative '../config/environment'
require 'rails/test_help'

# support files
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }

# Apartment setup
Apartment::Tenant.drop('sample') rescue nil
Apartment::Tenant.create('sample') rescue nil
Apartment::Tenant.switch! 'sample'

# Capybara setup
Capybara.configure do |config|
  config.default_host = 'http://lvh.me'
  config.always_include_port = true
end

class ActiveSupport::TestCase
  # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
  fixtures :all

  # Add more helper methods to be used by all tests here...
end

class ActionDispatch::IntegrationTest
  include Devise::Test::IntegrationHelpers
  include SubdomainHelper
  include SignInHelper # dependent on SubomainHelper

  setup do
    default_url_options[:host] = 'lvh.me'
    Apartment::Tenant.switch! 'public'
  end
end

...

# test/support/sign_in_helper.rb
module SignInHelper
  def sign_in_as(name)
    # This right here was the problem code
    user = users(name)
    use_account user.account
    sign_in user
  end
end

...

# test/support/subdomain_helper.rb
module SubdomainHelper
  def use_account(account)
    account.save unless account.persisted?

    default_url_options[:host] = "#{account.subdomain}.lvh.me"
    Capybara.app_host = "http://#{account.subdomain}.lvh.me"
    Apartment::Tenant.switch! account.subdomain
  end
end

...

# test/system/article/post_test.rb
require "application_system_test_case"

class Article::PostTest < ApplicationSystemTestCase
  test 'post a new document' do
    sign_in_as :will
    visit articles_path

    click_on 'Add New Article' # redirected to login page after clicking this button
    fill_in 'Name', with: 'Hello world!'
    fill_in 'Content', with: 'Yes yes'

    click_on 'Create Article'
    assert_select 'h1', /Hello world!/
  end
end

最终的问题是，在我实际切换到包含该用户的租户之前，我试图在 SignInHelper 中获取用户。有了这些知识，我将代码更改为如下所示：

# test/support/sign_in_helper.rb
module SignInHelper
  def sign_in_as(name, account)
    use_account accounts(account)
    sign_in users(name)
  end
end

...

# test/system/article/post_test.rb
require "application_system_test_case"

class Article::PostTest < ApplicationSystemTestCase
  test 'post a new document' do
    sign_in_as :will, :sample

    # ...
  end
end

现在会话持续存在。仍然让我感到困惑的一件事是，为什么我能够登录？我已将其归因于挥之不去的测试数据，但这更像是一种猜测。

Rails 5.2 集成测试中的会话未持续存在

Sessions not persisting in Rails 5.2 integration tests

integration-testing

ruby-on-rails

minitest

devise

warden