feat(active_record): Add ActiveRecord for testing.

Gemfile.lock

@@ -151,6 +151,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.4.2)
     standard (0.4.7)
       rubocop (~> 0.85.0)
       rubocop-performance (~> 1.6.0)
@@ -174,6 +175,7 @@ DEPENDENCIES
   futurism!
   pry (~> 0.12.2)
   rake (~> 13.0)
+  sqlite3
   standardrb
 
 BUNDLED WITH

futurism.gemspec

@@ -20,6 +20,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "pry", "~> 0.12.2"
   spec.add_development_dependency "standardrb"
+  spec.add_development_dependency "sqlite3"
 
   spec.add_dependency "rack", "~> 2.0"
   spec.add_dependency "rails", [">= 5.2", ">= 6"]

test/dummy/app/models/application_record.rb

@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

test/dummy/config/application.rb

@@ -4,7 +4,7 @@
 # Pick the frameworks you want:
 require "active_model/railtie"
 require "active_job/railtie"
-# require "active_record/railtie"
+require "active_record/railtie"
 # require "active_storage/engine"
 require "action_controller/railtie"
 # require "action_mailer/railtie"

test/dummy/config/database.yml

@@ -0,0 +1,25 @@
+# SQLite. Versions 3.8.0 and up are supported.
+#   gem install sqlite3
+#
+#   Ensure the SQLite 3 gem is defined in your Gemfile
+#   gem 'sqlite3'
+#
+default: &default
+  adapter: sqlite3
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  timeout: 5000
+
+development:
+  <<: *default
+  database: db/development.sqlite3
+
+# Warning: The database defined as "test" will be erased and
+# re-generated from your development database when you run "rake".
+# Do not set this db to the same as development or production.
+test:
+  <<: *default
+  database: db/test.sqlite3
+
+production:
+  <<: *default
+  database: db/production.sqlite3