Merge branch 'brodock/capybara-firefox-geckodriver' into 'master'

Enable capybara tests with Firefox (via geckodriver)

See merge request gitlab-org/gitlab!55377

spec/deprecation_toolkit_env.rb

@@ -61,6 +61,7 @@ module DeprecationToolkitEnv
       batch-loader-1.4.0/lib/batch_loader/graphql.rb
       carrierwave-1.3.1/lib/carrierwave/sanitized_file.rb
       activerecord-6.0.3.4/lib/active_record/relation.rb
+      selenium-webdriver-3.142.7/lib/selenium/webdriver/firefox/driver.rb
     ]
   end
 

spec/support/capybara.rb

@@ -79,8 +79,30 @@ Capybara.register_driver :chrome do |app|
   )
 end
 
+Capybara.register_driver :firefox do |app|
+  capabilities = Selenium::WebDriver::Remote::Capabilities.firefox(
+    log: {
+      level: :trace
+    }
+  )
+
+  options = Selenium::WebDriver::Firefox::Options.new(log_level: :trace)
+
+  options.add_argument("--window-size=#{CAPYBARA_WINDOW_SIZE.join(',')}")
+
+  # Run headless by default unless WEBDRIVER_HEADLESS specified
+  options.add_argument("--headless") unless ENV['WEBDRIVER_HEADLESS'] =~ /^(false|no|0)$/i
+
+  Capybara::Selenium::Driver.new(
+    app,
+    browser: :firefox,
+    desired_capabilities: capabilities,
+    options: options
+  )
+end
+
 Capybara.server = :puma_via_workhorse
-Capybara.javascript_driver = :chrome
+Capybara.javascript_driver = ENV.fetch('WEBDRIVER', :chrome).to_sym
 Capybara.default_max_wait_time = timeout
 Capybara.ignore_hidden_elements = true
 Capybara.default_normalize_ws = true