code: def test_forward_backward_with_mf(self):
      model = NeuralCF(10, 10, 5, 5, 5)
      input_data = np.random.randint(1, 10, size=(3, 2))
      self.assert_forward_backward(model, input_data)
  
file_path: analytics-zoo/pyzoo/test/zoo/models/recommendation/test_neuralcf.py
imports: import pytest
  import random
  from zoo.pipeline.api.keras.layers import *
  from zoo.models.recommendation import UserItemFeature
  from zoo.models.recommendation import NeuralCF
  from test.zoo.pipeline.utils.test_utils import ZooTestCase
label_desc: Use image node_id 2 for calling the TestNeuralCF obj's underlying member method code with example usage: obj.test_forward_backward_with_mf() without return types