class_docstr: map node test.
class_docstr_tok: ["map","node","test","."]
code: def test_no_output(self):
      node_info = {
          "inputs": ("num",),
          "outputs": (),
          "op_info": {
              "type": "lambda",
              "operator": print,
              "tag": "main",
              "init_args": None,
              "init_kws": {},
          },
          "iter_info": {"type": "map", "param": None},
          "config": {"name": "test"},
          "next_nodes": ["_output"],
      }
      node_repr = NodeRepr(uid="test_node", **node_info)
      in_que = DataQueue([("num", ColumnType.QUEUE)])
      in_que.put((1,))
      in_que.put((2,))
      in_que.seal()
      out_que = DataQueue([])
      node = create_node(node_repr, self.op_pool, [in_que], [out_que])
      self.assertTrue(node.initialize())
      f = self.thread_pool.submit(node.process)
      f.result()
      self.assertTrue(node.status == NodeStatus.FINISHED)
      self.assertTrue(out_que.sealed)
      self.assertEqual(out_que.size, 0)
  
imports: import unittest
  import time
  import copy
  import uuid
  from concurrent.futures import ThreadPoolExecutor
  from towhee.runtime.node_repr import NodeRepr
  from towhee.runtime.nodes import create_node, NodeStatus
  from towhee.runtime.data_queue import DataQueue, ColumnType, Empty
  from towhee.runtime.operator_manager import OperatorPool
label_desc: Use image node_id 14 for calling the TestMapNode obj's underlying member method code with example usage: obj.test_no_output() without return types