[Rails][Activerecord] Active Record Bug Test Helper

activerecord_bug_test_helper.rb

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'activerecord', '4.2.8'
    gem 'mysql2', '0.4.5'
    gem 'byebug'
  GEMFILE

  system 'bundle install'
end

require 'bundler'
Bundler.setup(:default)

require 'byebug'
require 'mysql2'
require 'active_record'
require 'minitest/autorun'
require 'logger'

ActiveRecord::Base.establish_connection(
  adapter: 'mysql2',
  database: 'test',
  min_messages: 'warning'
)
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  message = "Running specs against #{ActiveRecord::Base.connection.adapter_name
  }, Active Record #{ActiveRecord::VERSION::STRING} and Arel #{Arel::VERSION}..."
  puts '=' * message.length, message, '=' * message.length

  create_table :admins, force: true do |t|
    t.timestamp :deleted_at
  end
end

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true

  class << self
    def default_scope
        where('id = 1')
    end
  end
end

class Admin < ApplicationRecord
end

class BugTest < Minitest::Test
  def test_association_stuff
    Admin.all.load
  end
end