code: def test_voc2007_init(self):
      dataset = VOCDataset(
          data_root="tests/data/VOCdevkit/",
          ann_file="VOC2007/ImageSets/Main/trainval.txt",
          data_prefix=dict(sub_data_root="VOC2007/"),
          filter_cfg=dict(
              filter_empty_gt=True, min_size=32, bbox_min_size=32
          ),
          pipeline=[],
      )
      dataset.full_init()
      self.assertEqual(len(dataset), 1)
  
      data_list = dataset.load_data_list()
      self.assertEqual(len(data_list), 1)
      self.assertEqual(len(data_list[0]["instances"]), 2)
      self.assertEqual(dataset.get_cat_ids(0), [11, 14])
  
imports: import unittest
  from mmdet.datasets import VOCDataset
label_desc: Use image node_id 1 for calling the TestVOCDataset obj's underlying member method code with example usage: obj.test_voc2007_init() without return types