code: def test_init(self):
      with self.assertRaises(AssertionError):
          HungarianAssigner([])
  
file_path: mmdetection/tests/test_models/test_task_modules/test_assigners/test_hungarian_assigner.py
imports: from unittest import TestCase
  import torch
  from mmengine import ConfigDict
  from mmengine.structures import InstanceData
  from mmdet.models.task_modules.assigners import HungarianAssigner
label_desc: Use image node_id 1 for calling the TestHungarianAssigner obj's underlying member method code with example usage: obj.test_init() without return types