As part of a project I wanted to run some rspec tests on a model that had many children models using Carrierwave to upload files to S3.

My models look something like this:

class User < ActiveRecord::Base
    ...
    has_many :images
    ...
end

class Image < ActiveRecord::Base
    ...
    belongs_to :user

    validates_presence_of :file
    ...
    mount_uploader :file, FileUploader
    ...
end

In order to this I needd a few things:

  • Rspec Tests
  • Store files locally (not on S3)
  • Clean up locally created files

Creating the test object

To help create the test objects I use FactoryGirl.

factory :user do
    ...
    after(:build) do |user, eval|
        user.images << FactoryGirl.build(:image, user: user)
    end
end

factory :image do
    user :user

    file File.open(File.join(Rails.root, '/spec/fixtures/files/image.png'))
end

In my user model spec I have the following:

describe User do
    it { should have_many :images }

    before(:each){
        @user = FactoryGirl.create(:user)
    }

    describe "images" do

        it "should have multiple images" do

            @user.images.create({document_file:File.open(File.join(Rails.root, '/spec/fixtures/files/image.png'))})
            @user.images.create({document_file:File.open(File.join(Rails.root, '/spec/fixtures/files/image.png'))})


            @user.images.length.should eq(3)
        end
    end
end

Store local for test

In production and development I didn’t want Carrierwave to use S3 as the storage source. So in the app/uploaders/file_uploader.rb file I removed the line storage :fog. This is now being configured in a new carrierwave.rb initalizer:

if Rails.env.test? or Rails.env.cucumber?
  CarrierWave.configure do |config|
    config.storage = :file
    config.enable_processing = false
  end
else
  CarrierWave.configure do |config|
    config.storage = :fog
  end
end

Cleaning up files

after(:each) do
    if Rails.env.test? || Rails.env.cucumber?
        @document.versions.each do |v|
            store_path = File.dirname(File.dirname(v.document_file.url))
            temp_path = v.document_file.cache_dir
            FileUtils.rm_rf(Dir["#{Rails.root}/public/#{store_path}/[^.]*"])
            FileUtils.rm_rf(Dir["#{temp_path}/[^.]*"])
        end
    end
end