在RSpec中使用Rails引擎

Question

How can I create a rails engine inside of a spec test? I would be using it to test a gem. Here is what I am trying

module Zan
  class Engine < ::Rails::Engine
    isolate_namespace MyEngine
  end
end

and I am getting

 Failure/Error: class Engine < ::Rails::Engine
 NameError:
   uninitialized constant Rails

I've tried bundle exec rake spec with the same result.

Answer 1

You need to add rails as a dependency of the gem, and require it in the spec helper:

# your_gem.gemspec

spec.add_development_dependency 'rails'


# spec_helper.rb

require 'rubygems'
require 'bundler/setup'