code: def test_fileList(self):
      test = _ForwardShapenet(self.datadir, 0)
      self.assertEqual(len(test), 2)
  
imports: import unittest
  import os
  import sys
  import torch
  from omegaconf.dictconfig import DictConfig
  import numpy.testing
  import numpy
  import copy
  from test.mock_models import MockModel
  from torch_points3d.datasets.segmentation.forward.shapenet import _ForwardShapenet, ForwardShapenetDataset
label_desc: Use image node_id 2 for calling the TestForwardData obj's underlying member method code with example usage: obj.test_fileList() without return types