code: def test_health(client: TestClient):
      response = client.get("/health")
      assert response.status_code == 200
      assert response.json() == {"status": "OK"}
  
file_path: mlflow/tests/deployments/server/test_server_app.py
imports: from unittest import mock
  import pytest
  from fastapi.testclient import TestClient
  from mlflow.deployments.server.app import create_app_from_config, create_app_from_env
  from mlflow.deployments.server.constants import MLFLOW_DEPLOYMENTS_CRUD_ENDPOINT_BASE, MLFLOW_DEPLOYMENTS_ENDPOINTS_BASE
  from mlflow.exceptions import MlflowException
  from mlflow.gateway.config import GatewayConfig
  from tests.gateway.tools import MockAsyncResponse
label_desc: Use image node_id 3 for calling a global function with example usage: test_health(client) without return types