Fix for tag test issues

Gemfile

@@ -88,6 +88,7 @@ group :test do
   gem 'webmock',               require: nil
   gem 'stripe-ruby-mock', '2.0.1',      require: 'stripe_mock'
   gem 'timecop'
+  gem 'mock_redis'
 
   platform :mri, :rbx do
     gem 'simplecov',        require: nil

Gemfile.lock

@@ -101,6 +101,7 @@ GEM
       ruby-progressbar
     mocha (1.1.0)
       metaclass (~> 0.0.1)
+    mock_redis (0.16.1)
     msgpack (0.7.5)
     multi_json (1.11.2)
     net-scp (1.2.1)
@@ -260,6 +261,7 @@ DEPENDENCIES
   minitest
   minitest-reporters
   mocha
+  mock_redis
   msgpack
   paypal-recurring
   pg
@@ -301,4 +303,4 @@ DEPENDENCIES
   zipruby
 
 BUNDLED WITH
-   1.11.2
+   1.12.1

environment.rb

@@ -62,7 +62,12 @@ Sidekiq.configure_client do |config|
   config.redis = sidekiq_redis_config
 end
 
-$redis = Redis.new
+if ENV['RACK_ENV'] == 'test'
+  $redis = MockRedis.new
+else
+  $redis = Redis.new
+end
+
 $redis_cache = Redis::Namespace.new :cache, redis: $redis
 
 # :nocov:

models/tag.rb

@@ -23,7 +23,7 @@ class Tag < Sequel::Model
   end
 
   def self.popular_names(limit=10)
-    cache = $redis_cache.get :tag_popular_names
+    cache = $redis_cache['tag_popular_names']
     if cache.nil?
       res = DB["select tags.name,count(*) as c from sites_tags inner join tags on tags.id=sites_tags.tag_id where tags.name != '' and tags.is_nsfw='f' group by tags.name having count(*) > 1 order by c desc LIMIT ?", limit].all
       $redis_cache.set :tag_popular_names, res.to_msgpack