[Ruby] For file uploads, use 'CarrierWave'

Notes on the CarrierWave gem for file uploads in Rails, plus how to test uploads with RSpec.

Ruby on Rails + Rspec + Capybara Initial Setup

Set up RSpec and Capybara in Rails 5 and run your first Feature test end-to-end.

[Ruby on Rails] How to Skip Creating Test::Unit Files When Creating an App

Use `rails new APP -T` to skip Test::Unit file generation in Rails 3.2 when you plan to use RSpec.

[Ruby on Rails] File Upload Methods in RSpec

A list of file-upload helper methods available when testing Rails controllers with RSpec.