undefined method `link_to_remote' in MiniTest for application_helper test

Question

While migrating an application from Rails 2.3.17 to 3.2.21.. We are facing an issue with Rails legacy form helper link_to_remote while testing with MiniTest.

In older version of rails we have used link_to_remote form helper which is removed in Rails 3. To provide support we have added prototype_legacy_helper plugin in our application which works fine in UI but tests for that fails and throws error like given below:

NoMethodError: undefined method `link_to_remote' for #<ApplicationHelperTest:0xc800dd4>

This is our code inside ApplicationHelper

def reservation_menu_command_link(command, *args)
  ...
  command_link = link_to_remote(anchor_text,options = {}, {:class => style_class})
  ...
end

This is our test case for application_helper test

def test_reservation_menu_command_link
  options = { :lodging_view => lv}
  assert_equal(%q{xyz}, reservation_menu_command_link(:cancel_all_possible, options))
end

So you can see that we have a method reservation_menu_command_link and we used it inside our UI which works fine but test for this definition fails.

Could anyone can help me out from this behaviour of plugin?

Answer 1

link_to_remote was deprecated between rails 2 and 3 the correct usage these days is

link_to 'Foo', { action: 'create' }, remote: true. Hopefully that helps