'Test case checking failure of pool for fetching stats.'

@mock.patch('cinder.volume.drivers.veritas.utils.message_data_plane')
def test_fetch_volume_stats_failure(self, mock_mdp):

    mock_obj = {'payload': {}}
    mock_mdp.return_value = (mock_obj, None)
    self.assertDictEqual(_stub_stats(), self.driver._fetch_volume_status())
