code: def setUp(self):
      self.dim = 1000
      self.random_string = "".join(
          random.choice("1234567890") for _ in range(8)
      )
      self.tmp_dir = "test-temp-" + self.random_string
      os.makedirs(self.tmp_dir)
  
      self.tmp_fname = os.path.join(
          self.tmp_dir, "shcorp." + self.random_string + ".tmp"
      )
      self.data = mock_data(dim=1000)
      self.corpus = ShardedCorpus(
          self.tmp_fname, self.data, dim=self.dim, shardsize=100
      )
  
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 1 for calling the TestShardedCorpus obj's underlying member method code with example usage: obj.setUp() without return types