FactoryGirl.define do factory :file_uploader, class: FileUploader do project secret nil transient do path { File.join(Rails.root, 'spec/fixtures/rails_sample.jpg') } file { Rack::Test::UploadedFile.new(path) } end after(:build) do |uploader, evaluator| uploader.store!(evaluator.file) end initialize_with do new(project, secret) end end end