title: Accessing rails_admin url helpers from Rspec files
body: <p>I am using Rails 3.2, RailsAdmin 0.0.3, Rspec and Capybara.</p>
  
  <p>I try to call RailsAdmin url helpers from my spec file as it is explained in the RailsAdmin wiki. <code>rails_admin.new_path(:model_name =&gt; :user)</code></p>
  
  <p>When I use the helper that way from a controller or a view it works nice but when trying to use it from a spec file it gives this error: </p>
  
  <blockquote>
    <p>undefined local variable or method `rails_admin' for #RSpec::Core::ExampleGroup::Nested_2:0xbe04948></p>
  </blockquote>
  
  <p>I guess that I have to add something to my spec_helper.rb file in order to load rails_admin. But after googling for a while and looking to rails_admin gem's spec_helper, I cannot figure out what...</p>
  
  <p>Any help will be apreciated!</p>