doc

.rspec

@@ -0,0 +1 @@
+--require common_helper

README.md

@@ -423,6 +423,16 @@ author.rate resource, 5, extra_scope: { approved: true }
 
 As you can see, now, only the rate with value `5` will be included on the final rating.
 
+### Specs
+
+To run all specs, run the following rakes:
+
+```sh
+bundle exec rake spec
+bundle exec rake spec_config
+bundle exec rake spec_config_with_extra_scopes
+```
+
 ### References
 
 - [Evan Miller](http://www.evanmiller.org/ranking-items-with-star-ratings.html)

spec/support/mysql.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require 'mysql2'
+
+client = Mysql2::Client.new(host: '127.0.0.1', username: :root)
+
+client.query('DROP DATABASE IF EXISTS rating_test;')
+client.query('CREATE DATABASE IF NOT EXISTS rating_test;')
+
+ActiveRecord::Base.establish_connection(adapter: :mysql2, database: :rating_test, username: :root, host: '127.0.0.1')