code: def test_mocking_wider_face():
      ds = tfds.load("wider_face", split="train")
      assert ds.element_spec["faces"]["expression"] == tf.TensorSpec(
          shape=(None,), dtype=tf.bool
      )
      for ex in ds.take(2):
          assert ex["faces"]["expression"].dtype == tf.bool
  
imports: import functools
  import pickle
  import numpy
  import pytest
  import tensorflow
  import tensorflow_datasets
label_desc: Use image node_id 7 for calling a global function with example usage: test_mocking_wider_face() without return types