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: test_kdf.rb
    path of file: ./repos/ruby/test/openssl
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require_relative 'ut
    
  def test_pbkdf2_hmac_sha1_rfc6070_c_4096_len_16
    p ="pass\0word"
    s = "sa\0lt"
    c = 4096
    dk_len = 16
    raw = %w{ 56 fa 6a a7 55 48 09 9d
              cc 37 d7 f0 34 25 e0 c3 }
    expected = [raw.join('')].pack('H*')
    value = OpenSSL::KDF.pbkdf2_hmac(p, salt: s, iterations: c, length: dk_len, hash: "sha1")
    assert_equal(expected, value)
  end