Merge pull request #12 from petergoldstein/feature/add_postgres

Get Postgres running

.github/workflows/tests.yml

@@ -4,12 +4,19 @@ on: [push, pull_request]
 
 jobs:
   test:
+    env:
+      DB: ${{ matrix.db }}
+
     runs-on: ubuntu-latest
 
     strategy:
       fail-fast: false
 
       matrix:
+        db:
+          - mysql
+          - postgres
+
         ruby:
           - '2.7'
           - '3.0'
@@ -27,6 +34,23 @@ jobs:
         ports:
           - 3306:3306
 
+      postgres:
+        env:
+          POSTGRES_DB: rating_test
+          POSTGRES_USER: postgres
+          POSTGRES_HOST_AUTH_METHOD: trust
+
+        image: postgres:alpine
+
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+        ports:
+          - 5432:5432
+
     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)
@@ -128,7 +129,7 @@ GEM
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.7.0, < 2.0)
-    rubocop-rspec (2.10.0)
+    rubocop-rspec (2.11.0)
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
     shoulda-matchers (5.1.0)
@@ -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/models/rating/averager_data_spec.rb

@@ -13,7 +13,14 @@ RSpec.describe Rating::Rating, ':averager_data' do
     end
 
     it 'returns the average of number of records for the given resource type' do
-      expect(result.as_json['count_avg'].to_s).to eq '1.333333333333333333'
+      case ENV.fetch('DB')
+      when 'mysql'
+        expect(result.count_avg).to eq(BigDecimal('1.333333333333333333'))
+      when 'postgres'
+        expect(result.count_avg).to eq(BigDecimal('1.3333333333333333'))
+      else
+        raise('DB env missing!')
+      end
     end
   end
 

spec/models/rating/data_spec.rb

@@ -21,7 +21,14 @@ RSpec.describe Rating::Rating, ':data' do
     end
 
     it 'returns the estimate for a resource' do
-      expect(result[:estimate].to_s).to eq '42.5000000000000000012000000505'
+      case ENV.fetch('DB')
+      when 'mysql'
+        expect(result[:estimate]).to eq(BigDecimal('42.5000000000000000012000000505'))
+      when 'postgres'
+        expect(result[:estimate]).to eq(BigDecimal('42.5000000000000001200000000000000012505'))
+      else
+        raise('DB env missing!')
+      end
     end
   end
 

spec/models/rating/update_rating_spec.rb

@@ -9,10 +9,19 @@ RSpec.describe Rating::Rating, ':update_rating' do
     it 'updates the rating data of the given resource' do
       record = described_class.find_by(resource: article_1)
 
-      expect(record.average).to  eq 50.5
-      expect(record.estimate).to eq 42.5
-      expect(record.sum).to      eq 101
-      expect(record.total).to    eq 2
+      case ENV.fetch('DB')
+      when 'mysql'
+        expect(record.average).to  eq(BigDecimal('50.5'))
+        expect(record.estimate).to eq(BigDecimal('42.5'))
+      when 'postgres'
+        expect(record.average).to  eq(BigDecimal('50.5'))
+        expect(record.estimate).to eq(BigDecimal('42.5000000000000001'))
+      else
+        raise('DB env missing!')
+      end
+
+      expect(record.sum).to   be(101)
+      expect(record.total).to be(2)
     end
   end
 
@@ -22,26 +31,26 @@ RSpec.describe Rating::Rating, ':update_rating' do
     it 'updates the rating data of the given resource respecting the scope' do
       record = described_class.find_by(resource: article_1, scopeable: category)
 
-      expect(record.average).to  eq 1.5
-      expect(record.estimate).to eq 1.5
-      expect(record.sum).to      eq 3
-      expect(record.total).to    eq 2
+      expect(record.average).to  eq(BigDecimal('1.5'))
+      expect(record.estimate).to eq(BigDecimal('1.5'))
+      expect(record.sum).to      be(3)
+      expect(record.total).to    be(2)
     end
   end
 
   context 'when rate table has no record' do
-    let!(:resource) { create :article }
+    let!(:resource) { create(:article) }
     let!(:scope) { nil }
 
     it 'calculates with counts values as zero' do
-      described_class.update_rating resource, scope
+      described_class.update_rating(resource, scope)
 
       record = described_class.last
 
-      expect(record.average).to  eq 0
-      expect(record.estimate).to eq 0
-      expect(record.sum).to      eq 0
-      expect(record.total).to    eq 0
+      expect(record.average).to  eq(BigDecimal('0.0'))
+      expect(record.estimate).to eq(BigDecimal('0.0'))
+      expect(record.sum).to      be(0)
+      expect(record.total).to    be(0)
     end
   end
 end

spec/support/database.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+ENV['DB'] ||= 'postgres'
+
+conn_params = { database: :rating_test, host: '127.0.0.1' }
+
+case ENV.fetch('DB')
+when 'mysql'
+  require 'mysql2'
+
+  client = Mysql2::Client.new(host: conn_params[:host], username: :root)
+
+  conn_params[:adapter] = :mysql2
+  conn_params[:username] = :root
+when 'postgres'
+  require 'pg'
+
+  client = PG::Connection.new(host: conn_params[:host], password: '', user: :postgres)
+
+  conn_params[:adapter] = :postgresql
+  conn_params[:username] = :postgres
+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')