code: def test_parse_mongo_db_arg_hostname():
      assert parse_mongo_db_arg("localhost:28017") == {
          "url": "localhost:28017"
      }
  
      assert parse_mongo_db_arg("www.mymongo.db:28017") == {
          "url": "www.mymongo.db:28017"
      }
  
      assert parse_mongo_db_arg("123.45.67.89:27017") == {
          "url": "123.45.67.89:27017"
      }
  
file_path: sacred/tests/test_observers/test_mongo_option.py
imports: import pytest
  from sacred.observers.mongo import parse_mongo_db_arg, DEFAULT_MONGO_PRIORITY
label_desc: Use image node_id 3 for calling a global function with example usage: test_parse_mongo_db_arg_hostname() without return types