def test_actual_expiry(self):
# this doesn't work with JSONSerializer (serializing timedelta)
with override_settings(SESSION_SERIALIZER='django.contrib.sessions.serializers.PickleSerializer'):
self.session = self.backend() # reinitialize after overriding settings
# Regression test for #19200
old_session_key = None
new_session_key = None
try:
self.session['foo'] = 'bar'
self.session.set_expiry(-timedelta(seconds=10))
self.session.save()
old_session_key = self.session.session_key
# With an expiry date in the past, the session expires instantly.
new_session = self.backend(self.session.session_key)
new_session_key = new_session.session_key
self.assertNotIn('foo', new_session)
finally:
self.session.delete(old_session_key)
self.session.delete(new_session_key)
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