code: def test_getitem(self):
      _ = self.corpus[130]  # noqa:F841
      # Does retrieving the item load the correct shard?
      self.assertEqual(self.corpus.current_shard_n, 1)
  
      item = self.corpus[220:227]
  
      self.assertEqual((7, self.corpus.dim), item.shape)
      self.assertEqual(self.corpus.current_shard_n, 2)
  
      for i in range(220, 227):
          self.assertTrue(np.array_equal(self.corpus[i], item[i - 220]))
  
imports: import os
  import unittest
  import random
  import shutil
  import numpy
  from scipy import sparse
  from gensim.utils import is_corpus, mock_data
  from gensim.corpora.sharded_corpus import ShardedCorpus
label_desc: Use image node_id 5 for calling the TestShardedCorpus obj's underlying member method code with example usage: obj.test_getitem() without return types