Refs #22804 -- Made an unsafe value of 'sep' in Signer an exception.

import json

import re

import time

import warnings

import zlib

from django.conf import settings

from django.utils import baseconv

from django.utils.crypto import constant_time_compare, salted_hmac

from django.utils.deprecation import RemovedInDjango110Warning

from django.utils.encoding import force_bytes, force_str, force_text

from django.utils.module_loading import import_string

        self.key = key or settings.SECRET_KEY

        self.sep = force_str(sep)

        if _SEP_UNSAFE.match(self.sep):

            warnings.warn('Unsafe Signer separator: %r (cannot be empty or consist of only A-z0-9-_=)' % sep,

                          RemovedInDjango110Warning)

            raise ValueError(

                'Unsafe Signer separator: %r (cannot be empty or consist of '

                'only A-z0-9-_=)' % sep,

            )

        self.salt = force_str(salt or

            '%s.%s' % (self.__class__.__module__, self.__class__.__name__))

from __future__ import unicode_literals

import datetime

import warnings

from django.core import signing

from django.test import SimpleTestCase

    def test_invalid_sep(self):

        """should warn on invalid separator"""

        msg = 'Unsafe Signer separator: %r (cannot be empty or consist of only A-z0-9-_=)'

        separators = ['', '-', 'abc']

        for sep in separators:

            with warnings.catch_warnings(record=True) as recorded:

                warnings.simplefilter('always')

            with self.assertRaisesMessage(ValueError, msg % sep):

                signing.Signer(sep=sep)

                self.assertEqual(len(recorded), 1)

                msg = str(recorded[0].message)

                self.assertTrue(msg.startswith('Unsafe Signer separator'))

class TestTimestampSigner(SimpleTestCase):