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: rake_helpers.rb
    path of file: ./repos/activerecord-sqlserver-adapter/test/support
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

SQLSERVER_HELPER = "test/cases/helper_sqlserver.rb"
SQLSERVER_COERCED = "test/cases/coerced_tests.rb"

def env_ar_test_files
  return unless E
    
def test_files
  if env_ar_test_files
    [SQLSERVER_HELPER] + env_ar_test_files
  elsif env_test_files
    env_test_files
  elsif ENV["ONLY_SQLSERVER"]
    sqlserver_cases
  elsif ENV["ONLY_ACTIVERECORD"]
    [SQLSERVER_HELPER] + (ar_cases + [SQLSERVER_COERCED])
  else
    [SQLSERVER_HELPER] + (ar_cases + [SQLSERVER_COERCED] + sqlserver_cases)
  end