'driver supports only one replication target.'

@mock.patch.object(proxy.IBMStorageProxy, '__init__')
def test_do_replication_setup(self, mock_init):

    replication_device = ['fake_device_1', 'fake_device_2']
    ds8k_proxy = ds8kproxy.DS8KProxy(self.storage_info, self.logger, self.exception, self)
    self.assertRaises(exception.InvalidParameterValue, ds8k_proxy._do_replication_setup, replication_device, None)
