code: def test_fv_wrong_gmm_type():
      """
      Test that FisherVectorException is raised when a GMM not of type
      sklearn.mixture.GaussianMixture is passed into the fisher_vector
      function.
      """
  
      class MyDifferentGaussianMixture:
          pass
  
      with pytest.raises(FisherVectorException):
          fisher_vector(
              np.zeros((10, 10)), MyDifferentGaussianMixture()
          )
  
file_path: scikit-image/skimage/feature/tests/test_fisher_vector.py
imports: import pytest
  import numpy
  from skimage.feature._fisher_vector import learn_gmm, fisher_vector, FisherVectorException, DescriptorException
label_desc: Use image node_id 11 for calling a global function with example usage: test_fv_wrong_gmm_type() without return types