code: def test_default_preprocess():
      image_arr = np.random.randn(16, 16, 3).astype("uint8")
  
      result = default_preprocess(
          data=image_arr,
          image_shape=(32, 32),
          rescale=True,
          expand_dims=True,
      )
      assert isinstance(result, np.ndarray)
      assert result.shape == (1, 32, 32, 3)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_default_preprocess() without return types