code: def test_parse_mongo_db_arg():
      assert parse_mongo_db_arg("foo") == {"db_name": "foo"}
  
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 1 for calling a global function with example usage: test_parse_mongo_db_arg() without return types