#!/usr/bin/python3

import os
import shutil
import subprocess
import tarfile
import tempfile
import unittest


class TestTarfile(unittest.TestCase):

    def setUp(self):
        self.tempdir = tempfile.mkdtemp()
        os.chdir(self.tempdir)

    def tearDown(self):
        shutil.rmtree(self.tempdir)

    def test_tarfile_crash(self):
        # create tar
        os.mkdir("run")
        os.mkdir("var")
        os.symlink("run", "var/run")
        tarname = "lala.tar"
        subprocess.check_call(["tar", "cf", tarname, "./run", "./var"])

        # tar works
        subprocess.check_call(["tar", "xf", tarname])

        # but tarfile does not
        with tarfile.open(tarname) as tar:
            tar.extractall(".")


if __name__ == "__main__":
    unittest.main()