Method test_fileobj_with_offset

Lib/test/test_tarfile.py:623–649

(self)

            tar = self.taropen(tmpname, '')

    def test_fileobj_with_offset(self):
        # Skip the first member and store values from the second member
        # of the testtar.
        tar = tarfile.open(self.tarname, mode=self.mode)
        try:
            tar.next()
            t = tar.next()
            name = t.name
            offset = t.offset
            with tar.extractfile(t) as f:
                data = f.read()
        finally:
            tar.close()

        # Open the testtar and seek to the offset of the second member.
        with self.open(self.tarname) as fobj:
            fobj.seek(offset)

            # Test if the tarfile starts with the second member.
            with tar.open(self.tarname, mode="r:", fileobj=fobj) as tar:
                t = tar.next()
                self.assertEqual(t.name, name)
                # Read to the end of fileobj and test if seeking back to the
                # beginning works.
                tar.getmembers()
                self.assertEqual(tar.extractfile(t).read(), data,
                        "seek back did not work")

    def test_fail_comp(self):
        # For Gzip and Bz2 Tests: fail with a ReadError on an uncompressed file.