def test_bad_url(self):
        """Unrecognized package format, assumes tar can figure it out"""
        d = downloader(url='http://mysite.com/foo.Z')
        self.assertEqual(d.download_step(),
r'''mkdir -p /var/tmp && wget -q -nc --no-check-certificate -P /var/tmp http://mysite.com/foo.Z && \
    mkdir -p /var/tmp && tar -x -f /var/tmp/foo.Z -C /var/tmp''')
        self.assertEqual(d.src_directory, None)
Unrecognized package format, assumes tar can figure it out
test/test_downloader.py