code: def test_len(self):
      d = {i: i + 1 for i in range(50)}
      assert len(get_random_dict_combos(d, 1000)) == 1000
  
imports: import itertools
  import random
  import sys
  from typing import Dict, List
  import pytest
  from ray import serve
  from ray.serve._private.config import DeploymentConfig
  from ray.serve.deployment import deployment_to_schema, schema_to_deployment
label_desc: Use image node_id 3 for calling the TestGetDictCombos obj's underlying member method code with example usage: obj.test_len() without return types