Here's a quick tip for people using Paperclip that I mentioned on the Google Group. You can easily stub out calls to S3 in your tests using mocha like so:
Photo.any_instance.stubs(:save_attached_files).returns(true) Photo.any_instance.stubs(:destroy_attached_files).returns(true)
Of course, you'd want to change the Photo bit depending on the model you have using Paperclip.
Hopefully this little tip will save others the fruitless Googling and annoying code digging I did :)
Thanks, I was stubbing one instance a time with save_attached_files, but here you are using any_instance, which is a clever method.