code: def test_integration_no_server():
      with pytest.raises(
          ConnectionError, match="Error connecting to Visdom server"
      ):
          VisdomLogger()
  
imports: import sys
  from unittest.mock import ANY, call, MagicMock, patch
  import pytest
  import torch
  from ignite.contrib.handlers.visdom_logger import _DummyExecutor, global_step_from_engine, GradsScalarHandler, OptimizerParamsHandler, OutputHandler, VisdomLogger, WeightsScalarHandler
  from ignite.engine import Engine, Events, State
label_desc: Use image node_id 16 for calling a global function with example usage: test_integration_no_server() without return types