def test_can_list_running_nodes_for_specified_env(self):
provider = FileBackedNodeProvider()
provider.start(None, 'dev', 'some_def')
node_to_terminate = provider.start(None, 'dev', 'some_def')
provider.shutdown(node_to_terminate.id())
provider.start(None, 'prod', 'some_def')
dev_env = EnvironmentDefinition('dev', provider, service_definitions,
None, all_credentials, 'some_def')
nodes = dev_env.list_nodes()
self.assertEqual(nodes.__len__(), 1)
