spec/system をSelenium経由で実行する (#1804)

* chore: 不要なwebdrivers gemを削除

* feat(test): Seleniumを導入

* chore(test): systemテストを実行する際はrake assets:precompileを実行する

* chore(test): precompile_assets.rbで例外を無視せず送出する

* add networks

* add docker-compose.test.yml

* remove comment

---------

Co-authored-by: Kosuke Tanabe <[email protected]>

Author: kimihito

docker-compose.test.yml

@@ -0,0 +1,16 @@
+version: '3.8'
+
+services:
+  web:
+    environment:
+      - WEBPACKER_DEV_SERVER_HOST=webpacker
+
+  selenium:
+    image: selenium/standalone-chrome:114.0
+    networks:
+      internal:
+    expose:
+      - 4444
+      - 7900
+      - 5900
+    shm_size: 2gb

spec/rails_helper.rb

@@ -68,11 +68,5 @@
   # config.filter_gems_from_backtrace("gem name")
   config.extend ControllerMacros, type: :controller
 
-  config.before(:each) do |example|
-    if example.metadata[:type] == :system
-      driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400]
-    end
-  end
-
   config.include Pundit::Authorization, type: :view
 end

spec/support/capybara.rb

@@ -0,0 +1,22 @@
+require 'capybara/rspec'
+require "selenium-webdriver"
+
+Capybara.register_driver :remote_chrome do |app|
+  url = ENV['SELENIUM_DRIVER_URL']
+
+  options = ::Selenium::WebDriver::Chrome::Options.new
+  options.add_argument("--headless")
+  options.add_argument("--no-sandbox")
+  options.add_argument('--disable-dev-shm-usage')
+  options.add_argument('--window-size=1400,1400')
+
+  Capybara::Selenium::Driver.new(app, browser: :remote, url: url, options: options)
+end
+
+RSpec.configure do |config|
+  config.before(:each, type: :system) do
+    Capybara.server_host = IPSocket.getaddress(Socket.gethostname)
+    Capybara.app_host = "http://#{Capybara.server_host}"
+    driven_by :remote_chrome
+  end
+end

spec/support/precompile_assets.rb

@@ -0,0 +1,28 @@
+RSpec.configure do |config|
+  config.before(:suite) do
+    examples = RSpec.world.filtered_examples.values.flatten
+    has_no_system_tests = examples.none? { |example| example.metadata[:type] == :system }
+
+    if has_no_system_tests
+      $stdout.puts "\n No system test selected. Skip assets compilation.\n"
+      next
+    end
+
+    $stdout.puts "\n Precompiling assets.\n"
+    original_stdout = $stdout.clone
+
+    start = Time.current
+    begin
+      $stdout.reopen(File.new("/dev/null", "w"))
+
+      require "rake"
+      Rails.application.load_tasks
+      Rake::Task["assets:precompile"].invoke
+    rescue => e
+      raise e.exception
+    ensure
+      $stdout.reopen(original_stdout)
+      $stdout.puts "Finished in #{(Time.current - start).round(2)} seconds"
+    end
+  end
+end