it'does not hightlight file if blob is not accessable'doallow_any_instance_of(Gitlab::Diff::File).toreceive(:blob).and_return(nil)expect_any_instance_of(Gitlab::Diff::File).not_toreceive(:highlighted_diff_lines)described_class.new(merge_request.merge_request_diff,diff_options: nil).diff_filesend