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-emacs-runner.rb
    path of file: ./repos/ruby-packer/ruby/gems/test-unit-3.3.4/test
    
    the code of the file until where you have to start completion: require 'test/unit'
require 'test/unit/ui/emacs/testrunner'

class TestUnitEmacsRunner < Test::Unit::TestCase
  def test_format_failure_with_a_location
    runner = create_runner
    test_name = "test_failure"
    file = "/home/user/test_xxx.rb"
    line = "3"
    info = "in `xxx'"
    location = "#{file}:#{line}: #{info}"
    message = "FAIL!!!"
    failure = Test::Unit::Failure.new(test_name, [location], message)
  
    
  def test_format_error
    runner = create_runner
    test_name = "test_error"
    message = "Error Message!!!"
    backtrace = ["/home/user/test_xxx.rb:3: in `xxx'",
                 "/home/user/yyy/test_yyy.rb:999: in `yyy'",
                 "/home/user/xyz/zzz.rb:29: in `zzz'"]
    exception = RuntimeError.new(message)
    exception.set_backtrace(backtrace)
    error = Test::Unit::Error.new(test_name, exception)
    assert_equal(<<-EOM.chomp, runner.send(:format_fault, error))
Error:
#{test_name}:
#{exception.class.name}: #{message}
#{backtrace.join("\n")}
EOM
  end