module UploadFileTestHelper
  def uploaded_file(filename, content_type = 'text/csv')
    t = Tempfile.new([filename.split('/').last, filename.split('.').last])
    t.binmode
    path = File.join(Rails.root, 'spec', 'fixtures', filename)
    FileUtils.copy_file(path, t.path)
    ActionDispatch::Http::UploadedFile.new(
                                             filename: filename,
                                             head: "Content-Disposition: form-data; name=\"file\"; filename=\"#{filename}\"\r\nContent-Type: #{content_type}\r\n",
                                             type: content_type,
                                             tempfile: t
                                           )
  end
end

RSpec.configure do |config|
  config.include UploadFileTestHelper
end