code: def test_check_estimator():
      check_estimator(KNORAU())
  
file_path: DESlib/deslib/tests/des/test_knorau.py
imports: import numpy
  from sklearn.linear_model import Perceptron
  from sklearn.utils.estimator_checks import check_estimator
  from deslib.des.knora_u import KNORAU
label_desc: Use image node_id 1 for calling a global function with example usage: test_check_estimator() without return types