LoadError: cannot load such file -- mock_redis

[Jeehut]

I am receiving the following error when running my tests (MiniTest via rake test command):
LoadError: cannot load such file -- mock_redis

Some excerpts of how I use sidekiq-unique-jobs:

Gemfile:

# Use sidekiq for background tasks
gem 'sidekiq'

# Use sidekiq enhancement for unique jobs
gem 'sidekiq-unique-jobs'

Worker:

class MyWorker
  include Sidekiq::Worker
  sidekiq_options queue: :my_queue, unique: true, 
                  unique_job_expiration: 24 * 60 * 60

  def perform(user_id)
    # some code
  end
end

test_helper:

require 'sidekiq/testing'
Sidekiq::Testing.fake!

I'm not sure if I'm doing something wrong here or if there is an issue with the combination of Rails 4.1.4, most current sidekiq and sidekiq-unique-jobs gems. Can anybody help me or fix this issue?

I think it is an issue because if I remove this gem from the project then all tests succeed.
Thanks for your help! :)

[jamesbowles]

Hi @Dschee

You need to add mock_redis to your Gemfile:

gem 'mock_redis', '~> 0.13.2'

that should fix your problem.

[mhenrixon]

Yeah, sorry about that. People complained about having mock_redis in their production environments

[Jeehut]

Thanks, @jamesbowles, that helped. But why do I need to install one more gem for using this one in the first place?

[mhenrixon]

If you want to test uniqueness in your app this is the easiest way to do it. If you don't want to use that gem check our test suite for how to test against real redis.