'Calling :py:obj:`OpenSSL.CRL.export` with a file type other than
:py:obj:`FILETYPE_PEM`, :py:obj:`FILETYPE_ASN1`, or :py:obj:`FILETYPE_TEXT` results
in a :py:obj:`ValueError` being raised.'

def test_export_unknown_filetype(self):

    crl = CRL()
    self.assertRaises(ValueError, crl.export, self.cert, self.pkey, 100, 10)
