code: def test_download_artifacts_download_file():
      with mock.patch.object(
          ArtifactRepositoryImpl, "list_artifacts", return_value=[]
      ):
          repo = ArtifactRepositoryImpl(_PARENT_DIR)
          repo.download_artifacts(_MODEL_FILE)
  
imports: import posixpath
  import time
  from unittest import mock
  import pytest
  from mlflow.entities import FileInfo
  from mlflow.exceptions import MlflowException
  from mlflow.store.artifact.artifact_repo import ArtifactRepository
  from mlflow.utils.file_utils import TempDir
label_desc: Use image node_id 2 for calling a global function with example usage: test_download_artifacts_download_file() without return types