milliseconds_resolution.rb

# Activate the gem you are reporting the issue against.
gem 'activerecord', '4.0.2'
gem 'activesupport', '4.0.2'
require 'active_record'
require 'active_support/time_with_zone'
require 'minitest/autorun'
require 'logger'

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Base.default_timezone = :local
ActiveRecord::Base.time_zone_aware_attributes = true

ActiveRecord::Schema.define do
  create_table :posts do |t|
    t.timestamps
  end
end

class Post < ActiveRecord::Base
end

class BugTest < Minitest::Test
  def test_timestamps
    post = Post.create!
    assert_equal 'ActiveSupport::TimeWithZone', post.created_at.class.to_s
    assert_equal post.to_json, post.reload.to_json
  end
end