update_application_system_test_case

# File railties/lib/rails/generators/rails/devcontainer/devcontainer_generator.rb, line 45
      def update_application_system_test_case
        return unless options[:system_test]

        system_test_case_path = File.expand_path "test/application_system_test_case.rb", destination_root
        return unless File.exist? system_test_case_path

        gsub_file(system_test_case_path, /^\s*driven_by\b.*/, system_test_configuration)
      end