How to call an app helper method from an RSpec test in Rails?

Question

The title is self explanatory.

Everything I\'ve tried led to a \"undefined method\".

To clarify, I am not trying to test a helper method. I am trying to use a he

Answer 1

Based on Thomas Riboulet's post on Coderwall:

At the beginning of your spec file add this:

def helper
  Helper.instance
end

class Helper
  include Singleton
  include ActionView::Helpers::NumberHelper
end

and then call a particular helper with helper.name_of_the_helper.

This particular example includes the ActionView's NumberHelper. I needed the UrlHelper, so I did include ActionView::Helpers::UrlHelper and helper.link_to.