class_docstr: TimeWindowBufer
      
class_docstr_tok: ["TimeWindowBufer"]
docstr: 0s -----> 99s
  time_range_sec: 10s
  time_step_sec: 20s
docstr_tok: ["0s","--","--","-",">","99s","time_range_sec",":","10s","time_step_sec",":","20s"]
code: def test_size_less_than_step(self):
      """
      0s -----> 99s
      time_range_sec: 10s
      time_step_sec: 20s
      """
      for i in range(2, 110):
          self._in_test_function(i, i + 1, 100)
  
imports: import unittest
  import copy
  from concurrent.futures import ThreadPoolExecutor
  from towhee.runtime.node_repr import NodeRepr
  from towhee.runtime.nodes import create_node, NodeStatus
  from towhee.runtime.nodes._time_window import _TimeWindowBuffer
  from towhee.runtime.data_queue import DataQueue, ColumnType, Empty
  from towhee.runtime.operator_manager import OperatorPool
label_desc: Use image node_id 4 for calling the TestTimeWindowBuffer obj's underlying member method code with example usage: obj.test_size_less_than_step() without return types