code: def test_unknown_shape():
      fn = tf.function(transform_ops.rotate).get_concrete_function(
          tf.TensorSpec(shape=None, dtype=tf.float32), 0
      )
      for shape in (2, 4), (2, 4, 3), (1, 2, 4, 3):
          image = tf.ones(shape=shape)
          np.testing.assert_equal(image.numpy(), fn(image).numpy())
  
imports: import pytest
  import numpy
  import tensorflow
  from skimage import transform
  from tensorflow_addons.image import transform_ops
  from tensorflow_addons.utils import test_utils
label_desc: Use image node_id 20 for calling a global function with example usage: test_unknown_shape() without return types