code: def test_no_sklearn(mock_no_sklearn):
      with pytest.raises(
          ModuleNotFoundError,
          match=r"This contrib module requires scikit-learn to be installed",
      ):
          RocCurve()
  
file_path: ignite/tests/ignite/contrib/metrics/test_roc_curve.py
imports: from unittest.mock import patch
  import numpy
  import pytest
  import sklearn
  import torch
  from sklearn.metrics import roc_curve
  from ignite import distributed
  from ignite.contrib.metrics.roc_auc import RocCurve
  from ignite.engine import Engine
  from ignite.exceptions import NotComputableError
  from ignite.metrics.epoch_metric import EpochMetricWarning
label_desc: Use image node_id 3 for calling a global function with example usage: test_no_sklearn(mock_no_sklearn) without return types