An example of setting up an ActiveStorage attachment

active_storage_fixtures.rb

FactoryBot.define do
  factory :thing do
    after(:build) do |thing, evaluator|
        file_path = Rails.root.join('spec/fixtures/files/image-needs-auto-orient.jpg')
        thing.photos.attach(io: File.open(file_path), filename: 'photo.jpg')
      end
    end
  end
end