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: gel_test.rb
    path of file: ./repos/gel/test
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require "test_helper"

class GelTest < Minitest::Test
  SAFE_STDLIB = %w(rbconfig monitor)

  # These depend on the gems feature, so when comparing against a
  # --disable=gems run, they must be disabled to get an accurate
  # comparison.
  GEM_DEPENDENT_FEATURES = %w(error_highlight did_you_mean syntax_suggest)

  def test_that_it_has_a_version_number
    refute_nil ::Gel::VERSION
  end

  def test_tests_cannot_see_rubygems_runtime
    assert_nil defined?(::Gem.default_exec_format)
  end

  def test_tests_cannot_see_bundler_runtime
    assert_nil defined?(::Bundler::FileUtils)
  end

  def test_tests_dont_have_rubygems_loaded
    assert_empty $".grep(/(?<!slib\/|com
    
  def constants_visible_at_boot(gel:, command_line:)
    pure_subprocess_output(<<-RUBY, gel: gel, command_line: command_line, chdir: File.expand_path("..", RbConfig.ruby))
      def walk(scope, parent_modules = [], parent_names = [])
        parent_modules += [scope]

        scope.constants(false).sort.each do |name|
          full_name = parent_names + [name]

          puts full_name.join("::")

          # If these are present, they're deprecated, so don't touch them
          next if %w(TRUE FALSE NIL Fixnum Bignum Struct::Tms).include?(full_name.join("::"))

          if ((child = scope.const_get(name)) rescue nil) && child.is_a?(::Module)
            next if parent_modules.include?(child)

            walk(child, parent_modules, full_name)
          end
        end
      end

      walk(Object)
    RUBY
  end