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_minitest_test.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/minitest-5.10.2/test/minitest
    
    the code of the file until where you have to start completion: # encoding: UTF-8

require "pathname"
require "minitest/metametameta"

if defined? Encoding then
  e = Encoding.default_external
  if e != Encoding::UTF_8 then
    warn ""
    warn ""
    warn "NOTE: External encoding #{e} is not UTF-8. Tests WILL fa
    
  def test_filter_backtrace
    # this is a semi-lame mix of relative paths.
    # I cheated by making the autotest parts not have ./
    bt = (["lib/autotest.rb:571:in `add_exception'",
           "test/test_autotest.rb:62:in `test_add_exception'",
           "#{MINITEST_BASE_DIR}/test.rb:165:in `__send__'"] +
          BT_MIDDLE +
          ["#{MINITEST_BASE_DIR}/test.rb:29",
           "test/test_autotest.rb:422"])
    bt = util_expand_bt bt

    ex = ["lib/autotest.rb:571:in `add_exception'",
          "test/test_autotest.rb:62:in `test_add_exception'"]
    ex = util_expand_bt ex

    fu = Minitest.filter_backtrace(bt)

    assert_equal ex, fu
  end