text: from unittest import TestCase
  
  
  class TestCUHK01(TestCase):
      def test_init(self):
          import os.path as osp
          from reid.datasets import CUHK01
          from reid.utils.serialization import read_json
  
          root, split_id, num_val = '/tmp/open-reid/cuhk01', 0, 100
          dataset = CUHK01(root, split_id=split_id, num_val=num_val, download=True)
  
          self.assertTrue(osp.isfile(osp.join(root, 'meta.json')))
          self.assertTrue(osp.isfile(osp.join(root, 'splits.json')))
          meta = read_json(osp.join(root, 'meta.json'))
          self.assertEquals(len(meta['identities']), 971)
          splits = read_json(osp.join(root, 'splits.json'))
          self.assertEquals(len(splits), 10)
  
          self.assertDictEqual(meta, dataset.meta)
          self.assertDictEqual(splits[split_id], dataset.split)
  