code: def test_parse_mongo_db_arg_collection():
      kwargs = parse_mongo_db_arg("foo.bar")
      assert kwargs == {"db_name": "foo", "collection": "bar"}
  
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 2 for calling a global function with example usage: test_parse_mongo_db_arg_collection() without return types