Ruby 使用fixture\u文件\u上传方法Rails 4 Rspec

我正在用FactoryGirl和Rspec测试图像对象的创建

最初我一直在做我正在使用的事情

photo { File.new(File.join(Rails.root, 'spec/fixtures', photo_name)) }

但是突然之间我变得

Paperclip::AdapterRegistry::NoHandlerError:
No handler found for "#<File:0x00000003bf15c8>

虽然最初我在rails\u助手中声明了fixture路径，所以我尝试了这个方法

photo { fixture_file_upload photo_name, 'image/jpeg' }
# config.fixture_path = "#{::Rails.root}/spec/fixtures" # rails_helper
# Would produce error 'validated_image.jpg file does not exist'

我当前的实现（vey top）在执行此操作时没有创建映像实例

it 'creates a new image' do
  expect do
    post :create, image: FactoryGirl.attributes_for(:image)
  end.to change(Image, :count).by(1)
end
# ERROR
# expected #count to have changed by 1, but was changed by 0

我有什么遗漏吗

---

谢谢

最后，您是否能够使用Rspec 4的

fixture\u file\u upload

？我有一些相关的问题。我很想听听你的建议。

it 'creates a new image' do
  expect do
    post :create, image: FactoryGirl.attributes_for(:image)
  end.to change(Image, :count).by(1)
end
# ERROR
# expected #count to have changed by 1, but was changed by 0