'Applying the ``IClusterStateWipe`` removes attributes matching the
original ``NodeState`` information.'

def test_applying_indicates_ignorance(self):

    cluster = DeploymentState(nodes={self.NODE_FROM_APP_AGENT})
    cluster = self.NODE_FROM_DATASET_AGENT.update_cluster_state(cluster)
    cluster = self.APP_WIPE.update_cluster_state(cluster)
    self.assertEqual(cluster, DeploymentState(nodes=[self.NODE_FROM_DATASET_AGENT]))
