active_record_gem.rb template test case for '#update_attributes raises exception on ActiveRecord::RecordNotUnique'

update_attributes.rb

# Activate the gem you are reporting the issue against.
gem 'activerecord', '4.0.2'
require 'active_record'
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::Schema.define do
  create_table :users do |t|
    t.string "email"
  end
  add_index "users", ["email"], name: "index_users_on_email", unique: true
end

class User < ActiveRecord::Base
  before_save { self.email = email.downcase }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@mailinator\.com\z/i 
  validates :email, presence: true, uniqueness: true, format: {
    with: VALID_EMAIL_REGEX,
    message: "must be a Mailinator email address."
  }
end

class BugTest < Minitest::Test
  def test_uniqueness
    user1 = User.create! email: 'user@mailinator.com'
    user2 = User.create! email: 'user2@mailinator.com'

    assert_equal false, user2.update_attributes(id: user2.id, email: 'User@mailinator.com')
    assert_raises(ActiveRecord::RecordNotUnique) { user2.update_attributes!(id: user2.id, email: 'User@mailinator.com') }
  end
end