Get Postgres running

.github/workflows/tests.yml

@@ -14,7 +14,9 @@ jobs:
           - '2.7'
           - '3.0'
           - '3.1'
-
+        db:
+          - mysql
+          - postgres
     services:
       mysql:
         env:
@@ -26,7 +28,24 @@ jobs:
 
         ports:
           - 3306:3306
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_DB: rating_user
+          POSTGRES_USER: rating_user
+          POSTGRES_PASSWORD: rating_password
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
 
+    env:
+      DB: ${{ matrix.db }}
+      POSTGRES_USER: rating_user
+      POSTGRES_PASSWORD: rating_password
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.rubocop_todo.yml

@@ -51,7 +51,7 @@ Metrics/ParameterLists:
 # AllowedIdentifiers: capture3, iso8601, rfc1123_date, rfc822, rfc2822, rfc3339
 Naming/VariableNumber:
   Exclude:
-    - 'spec/support/mysql.rb'
+    - 'spec/support/database.rb'
 
 # Offense count: 9
 # This cop supports safe auto-correction (--auto-correct).

Gemfile.lock

@@ -71,6 +71,7 @@ GEM
     parallel (1.22.1)
     parser (3.1.2.0)
       ast (~> 2.4.1)
+    pg (1.3.5)
     racc (1.6.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -154,6 +155,7 @@ DEPENDENCIES
   debug
   factory_bot_rails
   mysql2
+  pg
   rating!
   rspec-rails
   rubocop-performance

rating.gemspec

@@ -22,6 +22,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'debug'
   spec.add_development_dependency 'factory_bot_rails'
   spec.add_development_dependency 'mysql2'
+  spec.add_development_dependency 'pg'
   spec.add_development_dependency 'rspec-rails'
   spec.add_development_dependency 'rubocop-performance'
   spec.add_development_dependency 'rubocop-rails'

spec/common_helper.rb

@@ -9,7 +9,7 @@ require 'debug'
 require 'rating'
 
 require 'support/common'
-require 'support/mysql'
+require 'support/database'
 require 'support/database_cleaner'
 require 'support/factory_bot'
 require 'support/migrate'

spec/support/database.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'mysql2'
+require 'pg'
+
+ENV['DB'] ||= 'mysql'
+
+conn_params = {
+  database: :rating_test,
+  host: '127.0.0.1',
+}
+
+case ENV.fetch('DB', nil)
+when 'mysql'
+  client = Mysql2::Client.new(host: '127.0.0.1', username: :root)
+  conn_params[:adapter] = :mysql2
+  conn_params[:username] = :root
+when 'postgres'
+  ENV['POSTGRES_USER'] ||= 'rating_user'
+  client = PG::Connection.new(host: '127.0.0.1', user: ENV.fetch('POSTGRES_USER', nil),
+    password: ENV.fetch('POSTGRES_PASSWORD', nil)
+  )
+  conn_params.merge!(
+    adapter: :postgresql,
+    username: ENV.fetch('POSTGRES_USER', nil),
+    password: ENV.fetch('POSTGRES_PASSWORD', nil)
+  )
+end
+
+client.query('DROP DATABASE IF EXISTS rating_test;')
+client.query('CREATE DATABASE rating_test;')
+
+ActiveRecord::Base.establish_connection(conn_params)

spec/support/mysql.rb

@@ -1,10 +0,0 @@
-# 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')