def test_network_default(self):
        self.assertIsInstance(
            ApplicationNodeDeployer(u'example.com', None).network,
            HostNetwork)
``ApplicationNodeDeployer._network`` is a ``HostNetwork`` by default.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/test/test_container.py/ApplicationNodeDeployerAttributesTests.test_network_default