code: def test_create_cnn():
      assert cnn.trainable is True
      assert isinstance(cnn, keras.models.Model)
  
file_path: chitra/tests/test_trainer.py
imports: from unittest.mock import MagicMock
  import numpy
  import pytest
  import tensorflow
  from tensorflow import keras
  from chitra.trainer import Dataset, InterpretModel, Trainer, create_cnn
label_desc: Use image node_id 1 for calling a global function with example usage: test_create_cnn() without return types