code: def test_init(self, cfg_file):
      model = get_detector_cfg(cfg_file)
      model = MODELS.build(model)
      assert model.detector
      assert model.reid
      assert model.tracker
  
file_path: mmdetection/tests/test_models/test_mot/test_deep_sort.py
imports: import time
  import unittest
  from unittest import TestCase
  import torch
  from mmengine.logging import MessageHub
  from mmengine.registry import init_default_scope
  from parameterized import parameterized
  from mmdet.registry import MODELS
  from mmdet.testing import demo_track_inputs, get_detector_cfg
label_desc: Use image node_id 2 for calling the TestDeepSORT obj's underlying member method code with example usage: obj.test_init(cfg_file) without return types