title: Ruby on Rails: RSpec and Acts As Audited (disabling acts_as_audited while testing?)
body: <p>I've been getting an error, which I think could be solved by
  disabling acts_as_audited when running tests, or at least stubbing
  current_user in audit sweeper. The error is below. What do you think I
  should do?</p>
  
  <pre><code>NoMethodError in 'Order should create a new instance given valid attributes'
  You have a nil object when you didn't expect it!
  The error occurred while evaluating nil.current_user
  /home/ramon/rails/app/vendor/plugins/acts_as_audited/lib/acts_as_audited/audit_sweeper.rb:73:in `send'
  /home/ramon/rails/app/vendor/plugins/acts_as_audited/lib/acts_as_audited/audit_sweeper.rb:73:in `current_user'
  /home/ramon/rails/app/vendor/plugins/acts_as_audited/lib/acts_as_audited/audit_sweeper.rb:61:in `after_create'
  ./spec/models/order_spec.rb:13:
  </code></pre>
  
  <p>In spec/models/order_spec.rb I've tried stubbing AuditSweeper.current_user, template.current_user, and controller.current_user to return a mock User model. None work.</p>
  
  <p>Any help is appreciated. Thanks!</p>