code: def test_find_app_non_existing_app():
      with pytest.raises(
          MlflowException, match=r"Failed to find app 'does_not_exist'"
      ):
          server._find_app("does_not_exist")
  
file_path: mlflow/tests/server/test_init.py
imports: import sys
  from unittest import mock
  import pytest
  from mlflow import server
  from mlflow.exceptions import MlflowException
label_desc: Use image node_id 3 for calling a global function with example usage: test_find_app_non_existing_app() without return types