module ActionView::TestCase::Behavior::ClassMethods

def helper_method(*methods)
  # Almost a duplicate from ActionController::Helpers
  methods.flatten.each do |method|
    _helpers_for_modification.module_eval <<~end_eval, __FILE__, __LINE__ + 1
      def #{method}(...)                    # def current_user(...)
        _test_case.send(:'#{method}', ...)  #   _test_case.send(:'current_user', ...)
      end                                   # end
    end_eval
  end
end