code: def test_follower(self):
      cache = Cache(SqliteCacheConfig(self.cache_path))
      request_1 = {"name": "request1"}
      compute_1 = lambda: {"response": "response1"}
  
      response, cached = cache.get(request_1, compute_1)
      assert response == {"response": "response1"}
      assert not cached
      assert cache_stats.num_queries[self.cache_path] == 1
      assert cache_stats.num_computes[self.cache_path] == 1
  
      follower_cache_file = tempfile.NamedTemporaryFile(delete=False)
      follower_cache_path = follower_cache_file.name
      with follower_cache_file:
          cache_with_follower_config = WithFollowerCacheConfig(
              main=SqliteCacheConfig(self.cache_path),
              follower=SqliteCacheConfig(follower_cache_path),
          )
          cache_with_follower = Cache(cache_with_follower_config)
  
          response, cached = cache_with_follower.get(
              request_1, compute_1
          )
          assert response == {"response": "response1"}
          assert cached
          assert cache_stats.num_queries[self.cache_path] == 2
          assert cache_stats.num_computes[self.cache_path] == 1
          assert cache_stats.num_queries[follower_cache_path] == 0
          assert cache_stats.num_computes[follower_cache_path] == 0
  
          request_2 = {"name": "request2"}
          compute_2 = lambda: {"response": "response2"}
  
          response, cached = cache_with_follower.get(
              request_2, compute_2
          )
          assert response == {"response": "response2"}
          assert not cached
          assert cache_stats.num_queries[self.cache_path] == 3
          assert cache_stats.num_computes[self.cache_path] == 2
          assert cache_stats.num_queries[follower_cache_path] == 0
          assert cache_stats.num_computes[follower_cache_path] == 0
  
          expected_dict = {
              '{"name": "request1"}': {"response": "response1"},
              '{"name": "request2"}': {"response": "response2"},
          }
          self.assertCountEqual(
              SqliteDict(follower_cache_path).items(),
              expected_dict.items(),
          )
  
file_path: H2O/h2o_hf/helm/src/helm/common/test_cache.py
imports: import os
  import tempfile
  import unittest
  import threading
  from helm.common.cache import Cache, SqliteCacheConfig, WithFollowerCacheConfig, cache_stats, get_all_from_sqlite
  from sqlitedict import SqliteDict
label_desc: Use image node_id 8 for calling the TestCache obj's underlying member method code with example usage: obj.test_follower() without return types