def test_unknown_dataset(self):
        return self.assertResult(
            b"POST", b"/configuration/containers",
            {
                u"node_uuid": self.NODE_A, u"name": u"postgres",
                u"image": u"postgres",
                u"volumes": [
                    {u'dataset_id': unicode(uuid4()), u'mountpoint': u'/db'}]
            }, NOT_FOUND,
            {u"description": u"Dataset not found."},
        )
If a volume is specified with an unknown dataset ID, a 404 error is
dataset/ETHPy150Open ClusterHQ/flocker/flocker/control/test/test_httpapi.py/CreateContainerTestsMixin.test_unknown_dataset