def test_git_clone_without_log
    in_temp_dir do |path|
      g = Git.clone(BARE_REPO_PATH, 'bare-co')
      actual_logger = g.instance_variable_get(:@logger)
      assert_equal(Logger, actual_logger.class)
    end
  end
If the :log option is not passed to Git.clone, a Logger will be created