code: def setUpClass(cls):
      master_seed(seed=1234)
      super().setUpClass()
  
      cls.y_train_iris_index = np.argmax(cls.y_train_iris, axis=1)
      cls.y_test_iris_index = np.argmax(cls.y_test_iris, axis=1)
  
      model = CatBoostClassifier(
          custom_loss=["Accuracy"],
          random_seed=42,
          logging_level="Silent",
      )
      cls.classifier = CatBoostARTClassifier(model=model)
      cls.classifier.fit(
          cls.x_train_iris,
          cls.y_train_iris_index,
          cat_features=[],
          eval_set=[],
      )
  
file_path: adversarial-robustness-toolbox/tests/estimators/classification/test_catboost.py
imports: import logging
  import unittest
  from catboost import CatBoostClassifier
  import numpy
  from art.estimators.classification.catboost import CatBoostARTClassifier
  from tests.utils import TestBase, master_seed
label_desc: Use image node_id 1 for calling the TestCatBoostClassifier obj's underlying member method code with example usage: obj.setUpClass(cls) without return types