refactor(spec): remove dep for rails < 6

- load models in spec/models instead of spec/dummy
- restructure database_helpers

Author: bivanalhar

lib/active_record/userstamp/stampable.rb

@@ -85,8 +85,7 @@ def add_userstamp_associations(options)
       belongs_to :updater, **relation_options.reverse_merge(foreign_key: config.updater_attribute) if
         associations.second
       if associations.third
-        relation_options.reverse_merge!(required: false) if ActiveRecord::VERSION::MAJOR >= 5 ||
-          (ActiveRecord::VERSION::MAJOR == 4 && ActiveRecord::VERSION::MINOR >= 2)
+        relation_options.reverse_merge!(required: false)
         belongs_to :deleter, **relation_options.reverse_merge(foreign_key: config.deleter_attribute)
       end
     end

spec/dummy/config/application.rb

@@ -18,10 +18,6 @@ class Application < Rails::Application
     # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
     # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
     # config.i18n.default_locale = :de
-
-    config.after_initialize do
-      require_relative '../db/schema'
-    end
   end
 end
 

spec/dummy/db/schema.rb

@@ -0,0 +1,57 @@
+require_relative './support/database_helpers.rb'
+
+def initialize_schema
+  initialize_database do
+    create_table :users, :force => true do |t|
+      t.column :name,           :string
+      t.column :creator_id,     :integer
+      t.column :created_on,     :datetime
+      t.column :updater_id,     :integer
+      t.column :updated_at,     :datetime
+    end
+  
+    # People are created and updated by Users
+    create_table :people, :force => true do |t|
+      t.column :name,           :string
+      t.column :creator_id,     :integer
+      t.column :created_on,     :datetime
+      t.column :updater_id,     :integer
+      t.column :updated_at,     :datetime
+    end
+  
+    # Posts are created and updated by People
+    create_table :posts, :force => true do |t|
+      t.column :title,          :string
+      t.column :creator_id,     :integer
+      t.column :created_on,     :datetime
+      t.column :updater_id,     :integer
+      t.column :updated_at,     :datetime
+      t.column :deleter_id,     :integer
+      t.column :deleted_at,     :datetime
+    end
+  
+    # Comments are created and updated by People
+    # and also use non-standard foreign keys.
+    create_table :comments, :force => true do |t|
+      t.column :post_id,        :integer
+      t.column :comment,        :string
+      t.column :created_by,     :integer
+      t.column :created_at,     :datetime
+      t.column :updated_by,     :integer
+      t.column :updated_at,     :datetime
+      t.column :deleted_by,     :integer
+      t.column :deleted_at,     :datetime
+    end
+  
+    create_table :tags, force: true do |t|
+      t.column :title,          :string
+    end
+  
+    create_table :post_tags, force: true do |t|
+      t.column :post_id,        :integer
+      t.column :tag_id,         :integer
+    end
+  end
+end
+
+initialize_schema

spec/models.rb

@@ -1,22 +1,29 @@
-def define_first_post
-  @first_post = Post.create!(title: 'a title')
+require 'active_record'
+
+def connect_to_database
+  ActiveRecord::Base.establish_connection adapter: 'sqlite3', database: ':memory:'
+end
+
+def clear_database
+  ActiveRecord::Base.descendants.each do |model|
+    model.delete_all if model.table_exists?
+  end
 end
 
-RSpec.configure do |config|
-  config.before(:each) do
-    User.delete_all
-    Person.delete_all
-    Post.delete_all
-    Comment.delete_all
-    User.reset_stamper
-    Person.reset_stamper
+def reset_database
+  ActiveRecord::Base.descendants.map(&:reset_column_information)
+  ActiveRecord::Base.connection.disconnect!
+  connect_to_database
+end
 
-    @zeus = User.create!(name: 'Zeus')
-    @hera = User.create!(name: 'Hera')
-    User.stamper = @zeus.id
+def initialize_database(&block)
+  reset_database
+  ActiveRecord::Schema.define(&block)
+end
 
-    @delynn = Person.create!(name: 'Delynn')
-    @nicole = Person.create!(name: 'Nicole')
-    Person.stamper = @delynn.id
-  end
+def define_first_post
+  @first_post = Post.create!(title: 'a title')
 end
+
+ActiveRecord::Migration.verbose = false
+connect_to_database