Capybara慢速测试，视图渲染需要大量时间

Question

使用最新的水豚 Rails 4.2 时问题仍然存在。

我认为这不是特定于驱动程序的问题，因为它在 rack_test、capybara-webkit 甚至 poltgeist 下运行缓慢。

渲染大约需要。 78086 毫秒。

示例日志输出：

   (6.5ms)  COMMIT
Started GET "/coming-soon" for 127.0.0.1 at 2015-08-07 11:53:27 +0200
Processing by FeaturesController#index as HTML
  TranslationKey Load (10.0ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "features.page-description"]]
  Feature Load (0.5ms)  SELECT "features".* FROM "features"
  TranslationKey Load (0.5ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "features.see_preview"]]
  TranslationKey Load (0.4ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "features.form-description"]]
  Rendered features/index.html.haml within layouts/application (67.2ms)
  TranslationKey Load (0.4ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "meta.title"]]
  TranslationKey Load (0.4ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "meta.description"]]
  TranslationKey Load (0.3ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "meta.keywords"]]
  MenuItem Load (6.1ms)  SELECT "menu_items".* FROM "menu_items" WHERE "menu_items"."menu_category" =   ORDER BY position ASC  [["menu_category", "3"]]
  TranslationKey Load (0.2ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "page.instagram_url"]]
  TranslationKey Load (0.2ms)  SELECT  "translation_keys".* FROM "translation_keys" WHERE "translation_keys"."key" =  LIMIT 1  [["key", "page.pinterest_url"]]
  Rendered shared/_header.html.haml (416.5ms)
  MenuItem Load (0.2ms)  SELECT "menu_items".* FROM "menu_items" WHERE "menu_items"."menu_category" =   ORDER BY position ASC  [["menu_category", "1"]]
  Rendered shared/_flash_messages.html.haml (5.4ms)
  Rendered shared/_analytics.html.erb (0.5ms)
Completed 200 OK in 78086ms (Views: 78046.3ms | ActiveRecord: 21.5ms)

TransitionKeys 是 fast_gettext 的东西。 MenuItems 是一个单元格 (cells gem).

我使用以下 gem 进行测试：

group :test do
  gem 'factory_girl_rails'
  gem 'mocha'
  gem 'shoulda'
  gem 'database_cleaner'
  gem "minitest-rails-capybara"
  gem 'capybara-email'
  gem 'capybara-webkit'
  gem 'poltergeist'
  gem 'cucumber-rails', :require => false
end

我也试过改变事务和截断策略。

怎么了？

编辑：

当我启动本地服务器时： RAILS_ENV=测试包执行 rails c
即使 config.assets.debug = false

也非常慢

Answer 1

确保在您的相关 config/environments/*.rb 文件中设置了 config.assets.debug = false（也许只是 test.rb）。

Answer 2

如果这仅发生在运行的第一个测试中，那么这与 Capybara 无关，很可能是编译资产的资产管道。您可以在运行测试之前尝试在测试环境中预编译它们，看看是否可以加快速度。

Capybara慢速测试，视图渲染需要大量时间

Capybara slow test, view rendering takes a lot of time

tdd

ruby-on-rails

capybara

capybara-webkit

poltergeist