title: how to omit something from an rspec controller test?
body: <p>In my RSpec controller test, I'm trying to test a particular action that makes a call to a subfunction.  But I don't want the test to include the call to that subfunction.  (it'll raise an error that simply cannot be fixed in my dev environment)  </p>
  
  <p>What's the best way to omit this subfunction call from this controller action while I'm running a test over it? </p>
  
  <p>Thanks.</p>