必要的檔案
- 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
命名空間