setup activerecord and db to test in irb (outside rails box)

test_activerecord.rb

require "rubygems"
require 'active_record'
require "sqlite3"
require "factory_girl"
require 'database_cleaner'

SQLite3::Database.new "test.sqlite3"
ActiveRecord::Base.establish_connection(
  :adapter => "sqlite3",
  :database  => "test.sqlite3"
)
conn = ActiveRecord::Base.connection

ActiveRecord::Migration.class_eval do
  drop_table(:items) if conn.table_exists? :items
  create_table(:items) do |t|
    t.column :title, :string
    t.column :state, :integer
  end
end 

class Item < ActiveRecord::Base
  enum state: [:on,:off]

  after_initialize :defaults

  def defaults
    self.state ||= :on
  end
  
  validates :state, presence: true
end

FactoryGirl.define do
  factory :item do
    title "Foo"
  end
end

i = FactoryGirl.create(:item)
puts i.valid?
puts i.state