code: def test_consume(self):
      names = [
          snapshot_writers_path + ".QueueWriter.create_queue",
          snapshot_writers_path + ".QueueWriter.create_consumer",
      ]
      with mock.patch(names[0]):
          with mock.patch(names[1]):
              task = mock.MagicMock()
              q = mock.MagicMock()
              q.get = mock.MagicMock(side_effect=[task, task, None])
              w = snapshot_writers.QueueWriter()
              w.consume(q)
  
              assert q.get.call_count == 3
              assert task[0].call_count == 2
              assert q.task_done.call_count == 3
  
imports: import multiprocessing
  import threading
  import unittest
  import mock
  from chainer import testing
  from chainer.training.extensions import snapshot_writers
  from chainer import utils
label_desc: Use image node_id 2 for calling the TestQueueWriter obj's underlying member method code with example usage: obj.test_consume() without return types