Queued Image Upload: Assert job handler modified model correctly?

I have a photo post model, and when a user saves their post, the image gets uploaded locally, and then a job is dispatched to take that image, upload it to the cloud, and update the model with the new cloud url.

From what I understand, when you fake the Queue class, you can only spy on the act of a job getting pushed to a queue, not the result of the job itself. So when feature testing my "photo post" saving, how can I assert that not only was a job pushed to the queue, but that it was successfully uploaded to my (faked) cloud storage?

Or is the idea that you'd write a completely separate test for the job class itself? I'm pretty new to testing, so these little snafoos are still a mystery to me :D