File actionpack/lib/action_dispatch/system_test_case.rb

• capybara/dsl
• capybara/minitest
• action_controller
• action_dispatch/system_testing/driver
• action_dispatch/system_testing/browser
• action_dispatch/system_testing/server
• action_dispatch/system_testing/test_helpers/screenshot_helper
• action_dispatch/system_testing/test_helpers/setup_and_teardown

• MODULE ActionDispatch
• CLASS ActionDispatch::SystemTestCase