'Confirm we send is_public = None as default when using Glance v1.'

def test_detail_v1(self):

    self.override_config('glance_api_version', 1)
    with mock.patch.object(self.service, '_client') as client_mock:
        client_mock.return_value = []
        result = self.service.detail(self.context)
    self.assertListEqual([], result)
    client_mock.call.assert_called_once_with(self.context, 'list', filters={'is_public': 'none'})
