'Verify that if all providers are in-active than method return empty list.'

@httpretty.activate
def test_get_credit_provider_display_names_without_providers(self):

    self._mock_ecommerce_courses_api(self.course_key, self.COURSE_API_RESPONSE)
    CreditProvider.objects.all().update(active=False)
    self.assertEqual(get_credit_provider_display_names(self.course_key), [])
