def METHOD_NAME(self):
    """
    We are making sure a file containing line numbers is read in reverse
    order, i.e. the first line that is read corresponds to the last line.
    number
    """
    fname = os.path.join(test_dir, "3000_lines.txt.gz")
    for idx, line in enumerate(reverse_readfile(fname)):
        assert int(line) == self.NUMLINES - idx