def METHOD_NAME(self):
    """
    Make sure that large textfiles are read properly
    """
    with open(os.path.join(test_dir, "3000_lines.txt")) as f:
        for idx, line in enumerate(reverse_readline(f, max_mem=0)):
            assert int(line) == self.NUMLINES - idx, "read_backwards read {} whereas it should "(
                "have read {" "}"
            ).format(int(line), self.NUMLINES - idx)