Just as easily, we could could pass the organization into the params hash before we pass it to VolunteerOp.new, which David was inclined to do until I suggested otherwise. I argued against it because I wasn't quick enough to figure out how to test it, but now that I think about it ...

`params[:volunteer_op][:organization] = current_user.organization`

could be tested with ...

`controller.params[:volunteer_op].should_receive(:=).with( ... )`