title: How to use the new ActiveSupport::Testing::TimeHelpers inside controller
body: <h2>Edit to make it more clear</h2>
  
  <p>Like the title tells how to use the awesome <a href="http://api.rubyonrails.org/classes/ActiveSupport/Testing/TimeHelpers.html#method-i-travel_to" rel="noreferrer">ActiveSupport::Testing::TimeHelpers#travel_to</a> method inside my controller. Like in tests, I want to achieve something like this:</p>
  
  <pre><code>SomethingConroller &lt; ApplicationController
    def index
      travel_to some_date do
        # some stuff that it depends on the current_date 
      end
    end
  end
  </code></pre>
  
  <p>Tried include the module:</p>
  
  <pre><code>include ActiveSupport::Testing::TimeHelpers
  </code></pre>
  
  <p>but I got:</p>
  
  <pre><code>uninitialized constant ActiveSupport::Testing
  </code></pre>
  
  <p>Hoping that the date traveled to will be applied to the <code>view</code>, <code>view_helpers</code>, <code>controller_action</code></p>