code: def test_n_estimators():
      """Check that the number of estimators is the number of features."""
      transformer = WEASELMUSE().fit(X, y)
      assert len(transformer._estimators) == n_features
      assert len(transformer._estimators_diff) == n_features
  
imports: import numpy
  import pytest
  from scipy.sparse import csr_matrix
  from pyts.multivariate.transformation import WEASELMUSE
label_desc: Use image node_id 3 for calling a global function with example usage: test_n_estimators() without return types