code: def test_output_handler_metric_names(dirname):
      wrapper = OutputHandler("tag", metric_names=["a", "b"])
      mock_logger = MagicMock(spec=VisdomLogger)
      mock_logger.vis = MagicMock()
      mock_logger.executor = _DummyExecutor()
  
      mock_engine = MagicMock()
      mock_engine.state = State(metrics={"a": 12.23, "b": 23.45})
      mock_engine.state.iteration = 5
  
      wrapper(mock_engine, mock_logger, Events.ITERATION_STARTED)
  
      assert (
          len(wrapper.windows) == 2
          and "tag/a" in wrapper.windows
          and "tag/b" in wrapper.windows
      )
      assert wrapper.windows["tag/a"]["win"] is not None
      assert wrapper.windows["tag/b"]["win"] is not None
  
      assert mock_logger.vis.line.call_count == 2
      mock_logger.vis.line.assert_has_calls(
          [
              call(
                  X=[5],
                  Y=[12.23],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a"]["opts"],
                  name="tag/a",
              ),
              call(
                  X=[5],
                  Y=[23.45],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/b"]["opts"],
                  name="tag/b",
              ),
          ],
          any_order=True,
      )
  
      wrapper = OutputHandler("tag", metric_names=["a"])
  
      mock_engine = MagicMock()
      mock_engine.state = State(
          metrics={"a": torch.tensor([0.0, 1.0, 2.0, 3.0])}
      )
      mock_engine.state.iteration = 5
  
      mock_logger = MagicMock(spec=VisdomLogger)
      mock_logger.vis = MagicMock()
      mock_logger.executor = _DummyExecutor()
  
      wrapper(mock_engine, mock_logger, Events.ITERATION_STARTED)
  
      assert len(wrapper.windows) == 4 and all(
          [f"tag/a/{i}" in wrapper.windows for i in range(4)]
      )
      assert wrapper.windows["tag/a/0"]["win"] is not None
      assert wrapper.windows["tag/a/1"]["win"] is not None
      assert wrapper.windows["tag/a/2"]["win"] is not None
      assert wrapper.windows["tag/a/3"]["win"] is not None
  
      assert mock_logger.vis.line.call_count == 4
      mock_logger.vis.line.assert_has_calls(
          [
              call(
                  X=[5],
                  Y=[0.0],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a/0"]["opts"],
                  name="tag/a/0",
              ),
              call(
                  X=[5],
                  Y=[1.0],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a/1"]["opts"],
                  name="tag/a/1",
              ),
              call(
                  X=[5],
                  Y=[2.0],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a/2"]["opts"],
                  name="tag/a/2",
              ),
              call(
                  X=[5],
                  Y=[3.0],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a/3"]["opts"],
                  name="tag/a/3",
              ),
          ],
          any_order=True,
      )
  
      wrapper = OutputHandler("tag", metric_names=["a", "c"])
  
      mock_engine = MagicMock()
      mock_engine.state = State(metrics={"a": 55.56, "c": "Some text"})
      mock_engine.state.iteration = 7
  
      mock_logger = MagicMock(spec=VisdomLogger)
      mock_logger.vis = MagicMock()
      mock_logger.executor = _DummyExecutor()
  
      with pytest.warns(UserWarning):
          wrapper(mock_engine, mock_logger, Events.ITERATION_STARTED)
  
      assert len(wrapper.windows) == 1 and "tag/a" in wrapper.windows
      assert wrapper.windows["tag/a"]["win"] is not None
  
      assert mock_logger.vis.line.call_count == 1
      mock_logger.vis.line.assert_has_calls(
          [
              call(
                  X=[7],
                  Y=[55.56],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a"]["opts"],
                  name="tag/a",
              ),
          ],
          any_order=True,
      )
  
      # all metrics
      wrapper = OutputHandler("tag", metric_names="all")
      mock_logger = MagicMock(spec=VisdomLogger)
      mock_logger.vis = MagicMock()
      mock_logger.executor = _DummyExecutor()
  
      mock_engine = MagicMock()
      mock_engine.state = State(metrics={"a": 12.23, "b": 23.45})
      mock_engine.state.iteration = 5
  
      wrapper(mock_engine, mock_logger, Events.ITERATION_STARTED)
  
      assert (
          len(wrapper.windows) == 2
          and "tag/a" in wrapper.windows
          and "tag/b" in wrapper.windows
      )
      assert wrapper.windows["tag/a"]["win"] is not None
      assert wrapper.windows["tag/b"]["win"] is not None
  
      assert mock_logger.vis.line.call_count == 2
      mock_logger.vis.line.assert_has_calls(
          [
              call(
                  X=[5],
                  Y=[12.23],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/a"]["opts"],
                  name="tag/a",
              ),
              call(
                  X=[5],
                  Y=[23.45],
                  env=mock_logger.vis.env,
                  win=None,
                  update=None,
                  opts=wrapper.windows["tag/b"]["opts"],
                  name="tag/b",
              ),
          ],
          any_order=True,
      )
  
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 5 for calling a global function with example usage: test_output_handler_metric_names(dirname) without return types