gistfile1.rb

    def test_with_cleaner(example)
      if $truncate
        DatabaseCleaner.clean_with :truncation
        $truncate = false
      end

      if example.metadata[:js].blank?
        DatabaseCleaner.start
      end

      example.run
    ensure
      if example.metadata[:js]
        # queue truncation
        $truncate = true
      else
        DatabaseCleaner.clean
      end
    end