code: def test_metrics():
      response = request_with_validation(
          api="/metrics",
          method="GET",
      )
      assert response.ok
  
      # Probe some strings that must exist in the metrics output
      assert (
          "# HELP app_info information about qdrant server"
          in response.text
      )
      assert "# TYPE app_info counter" in response.text
      assert 'app_info{name="qdrant",version="' in response.text
      assert "collections_total " in response.text
  
imports: import pytest
  from datetime import datetime
  from .helpers.collection_setup import basic_collection_setup, drop_collection
  from .helpers.helpers import request_with_validation
label_desc: Use image node_id 2 for calling a global function with example usage: test_metrics() without return types