CarrierWave多文件上传Rails单元测试

Question

I have been banging my head with Carrierwave. I finally was able to get carrier wave to upload multiple files by adding the master branch for Carrierwave to my Gemfile:

gem 'carrierwave', github:'carrierwaveuploader/carrierwave'

I used it for a model called Product and I did this. Product.rb

class Product < ActiveRecord::Base
  mount_uploaders :avatar, ProductUploader
end

And I essentially followed the rules and was able to upload multiple files all while having each file iterate through the create method in my products_controller.rb and creating a new Product instance for each file being uploaded.

Now. Here comes the Testing. Before, when only one file was being uploaded I was able to use,

test "should create product" do
  login
  excel_filename = 'files/product_create_test.xls'
  file = fixture_file_upload(excel_filename, 'application/excel')
  assert_difference('Product.count') do
    post :create, product: {:file_url => file}
  end

But now, after adding the ability to upload multiple files, it seems like fixture_file_upload is not working properly. I am getting this error:

 ProductsControllerTest#test_should_create_product:
    ArgumentError: wrong number of arguments (2 for 0)
        test/controllers/products_controller_test.rb:54:in `block (2 levels) in <class:ProductsControllerTest>'
        test/controllers/products_controller_test.rb:53:in `block in <class:ProductsControllerTest>'

I am not sure how to go around this. Like I said, when I had

 gem 'carrierwave' 

the previous test worked fine. Has anyone ever encountered this?

Answer 1

Here's what the problem was. In order to make it so that my fixture file uploads did not actually save in my test enviroment, I followed this article, http://jeffkreeftmeijer.com/2014/using-test-fixtures-with-carrierwave/#comment_768 .

Here it tells you to add the following to your test_helper file

class CarrierWave::Mount::Mounter
  def store!
    # Not storing uploads in the tests
  end
end

This essentially tells your testing environment not to store the uploaded fixtures anywhere. Anyway, this piece of code does not fly well with the addition of the carrier wave master branch for multiple file uploads. I ended up uncommenting it and despite the fact that is stores the uploaded files, my tests pass.