code: def test_n_clusters_in_clf():
      class DummyClusterer:
          def __init__(self):
              pass
  
          def fit(self):
              pass
  
          def fit_predict(self):
              pass
  
      clf = DummyClusterer()
      with pytest.raises(TypeError):
          plot.elbow_curve(X, clf)
  
imports: import pytest
  import numpy
  from unittest.mock import Mock
  import matplotlib.pyplot
  from matplotlib.testing.decorators import image_comparison
  from sklearn.tree import DecisionTreeClassifier
  from sklearn.cluster import KMeans, MiniBatchKMeans
  from sklearn.datasets import load_iris
  from sklearn_evaluation import plot
  import sklearn_evaluation.plot.clustering
  from ploomber_core.warnings import PloomberDeprecationWarning
label_desc: Use image node_id 2 for calling a global function with example usage: test_n_clusters_in_clf() without return types