code: def test_warning(y):
      y_true, y_pred = y
  
      with pytest.warns(
          FutureWarning,
          match="ClassificationReport will change its signature",
      ):
          plot.ClassificationReport(y_true, y_pred)
  
file_path: sklearn-evaluation/tests/test_classification_report.py
imports: import pytest
  import numpy
  from sklearn_evaluation import plot, __version__
  import warnings
label_desc: Use image node_id 4 for calling a global function with example usage: test_warning(y) without return types