Active Record tsrange timezone conversion bug

tsrange_tz_conversion_bug.rb

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  gem 'rails', github: 'rails/rails'
  gem 'arel', github: 'rails/arel'
  gem 'pg'
end

system("createdb tsrange_test")
at_exit do
  ActiveRecord::Base.connection.disconnect!
  system("dropdb tsrange_test")
end

require 'active_record'
require 'minitest/autorun'
require 'logger'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'postgresql', database: 'tsrange_test')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :sessions, force: true do |t|
    t.tsrange :duration
  end
end

Time.zone = 'Eastern Time (US & Canada)'

class Session < ActiveRecord::Base; end

class BugTest < Minitest::Test
  def test_tsrange_conversion
    session = Session.create!(duration: Time.zone.now..10.minutes.from_now)
    session.reload

    #            "EST" or "EDT"      "UTC"
    assert_equal Time.zone.now.zone, session.duration.begin.zone
    assert_equal Time.zone.now.zone, session.duration.end.zone
  end
end