code: def test_cnn_custom_class():
      cnn_class = FedotCNNImplementation()
  
      assert cnn_class.params is not None
      assert isinstance(cnn_class, FedotCNNImplementation)
  
imports: import numpy
  from test.unit.common_tests import is_predict_ignores_target
  from test.unit.tasks.test_classification import get_image_classification_data
  from fedot.core.operations.evaluation.operation_implementations.models.keras import FedotCNNImplementation, check_input_array, create_deep_cnn, fit_cnn, predict_cnn
label_desc: Use image node_id 2 for calling a global function with example usage: test_cnn_custom_class() without return types