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_case.rb
    path of file: ./repos/mechanize/lib/mechanize
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'mechanize'
require 'logger'
require 'tempfile'
require 'tmpdir'
require 'webrick'
require 'zlib'

require 'rubygems'

begin
  gem 'minitest'
rescue Gem::LoadError
end

require 'minitest/autorun'

begin
  require 'minitest/pride'
rescue LoadError
end

##
# A generic test case for testing mechanize.  Using a subclass of
# Mechanize::TestCase for your tests will create an isolated mechanize
# instance that won't pollute your filesystem or other tests.
#
# Once Mec
    
  def ssl_certificate
    @ssl_certificate ||= OpenSSL::X509::Certificate.new <<-CERT
-----BEGIN CERTIFICATE-----
MIIBQjCB7aADAgECAgEAMA0GCSqGSIb3DQEBBQUAMCoxDzANBgNVBAMMBm5vYm9k
eTEXMBUGCgmSJomT8ixkARkWB2V4YW1wbGUwIBcNMTExMTAzMjEwODU5WhgPOTk5
OTEyMzExMjU5NTlaMCoxDzANBgNVBAMMBm5vYm9keTEXMBUGCgmSJomT8ixkARkW
B2V4YW1wbGUwWjANBgkqhkiG9w0BAQEFAANJADBGAkEA8pmEfmP0Ibir91x6pbts
4JmmsVZd3xvD5p347EFvBCbhBW1nv1GsbCBEFlSiT1q2qvxGb5IlbrfdhdgyqdTX
UQIBATANBgkqhkiG9w0BAQUFAANBAAAB////////////////////////////////
//8AMCEwCQYFKw4DAhoFAAQUePiv+QrJxyjtEJNnH5pB9OTWIqA=
-----END CERTIFICATE-----
    CERT
  end