You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cache_bool_data_of_pure_has_and_belongs_to_many_test.rb
    path of file: ./repos/active_model_cachers/test
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'base_test'

class CacheBoolDataOfPureHasAndBelongsToManyTest < BaseTest
  def setup
    super
    # Cannot asscess private User::HABTM_Achievement2s directly in Rails 5
    @middle_klass = ActiveRecord::VERSION::MAJOR > 4 ? User.const_get(:HABTM_Achievement2s) : User::HABTM_Achievement2s
  end
  def test_basic_usage
    user = User.find_by(name: 'John1')

    assert_queries(1){ assert_equal true, user.cacher.has_achievement2s? }
    assert_queries(0){ assert_equal true, user.cacher.has_achievement2s? }
    assert_cache('active_model_cachers_User_at_has_ach
    
  def test_create_by_assigning_reversely
    user = User.find_by(name: 'John4')
    achievement = Achievement2.create

    assert_queries(1){ assert_equal false, user.cacher.has_achievement2s? }
    assert_queries(0){ assert_equal false, user.cacher.has_achievement2s? }
    assert_cache('active_model_cachers_User_at_has_achievement2s?_4' => ActiveModelCachers::FalseObject)

    assert_queries(2){ achievement.users = [user] }
    assert_cache({})

    assert_queries(1){ assert_equal true, user.cacher.has_achievement2s? }
    assert_queries(0){ assert_equal true, user.cacher.has_achievement2s? }
    assert_cache('active_model_cachers_User_at_has_achievement2s?_4' => true)
  ensure
    achievement.destroy
  end