title: Rails + Rspec: Where do I test app constants?
body: <p>So I know unit tests go in <code>spec/models</code>, but where do constants defined in initializers and YAML files go?</p>
  
  <p>Ex: This is in my ups_api.yml file:</p>
  
  <pre><code>testing_server:
    confirm_url: https://wwwcie.ups.com/ups.app/xml/ShipConfirm
    accept_url: https://wwwcie.ups.com/ups.app/xml/ShipAccept
  </code></pre>
  
  <p>This is loaded in my config/environment.rb. Where/how would I test the value of these constants? </p>