code: def test_random_strategy(self):
      dataloaders = self._build_dataloaders()
      strategy = (
          iteration_strategies.RandomIterationStrategy.from_params(
              dataloaders=dataloaders
          )
      )
  
      counter = Counter()
      count = 10000
      for _ in range(count):
          counter[strategy()] += 1
  
      for idx in range(0, self.NUM_DATALOADERS):
          self.assertTrue(counter[idx] <= 2100)
          self.assertTrue(counter[idx] >= 1900)
  
file_path: mmf/tests/datasets/test_iteration_strategies.py
imports: import unittest
  from collections import Counter
  import numpy
  import torch
  from mmf.datasets import iteration_strategies
  from tests.test_utils import NumbersDataset
label_desc: Use image node_id 5 for calling the TestIterationStrategies obj's underlying member method code with example usage: obj.test_random_strategy() without return types