'Verify the endpoint returns HTTP 404 if the provider does not exist.'

def test_post_invalid_provider_id(self):

    provider_id = u'fakey-provider'
    self.assertFalse(CreditProvider.objects.filter(provider_id=provider_id).exists())
    path = reverse(u'credit:provider_callback', args=[provider_id])
    response = self.client.post(path, {})
    self.assertEqual(response.status_code, 404)
