'Test that a 404 is returned if the user does not have a preference with the given preference_key.'

def test_get_preference_does_not_exist(self):

    self._set_url('does_not_exist')
    self.client.login(username=self.user.username, password=TEST_PASSWORD)
    response = self.send_get(self.client, expected_status=404)
    self.assertIsNone(response.data)
