class_docstr: Tests correctness of the DiscreteCosineTransform bijector.
code: def testZeroSizedInput(self):
      bijector = discrete_cosine_transform.DiscreteCosineTransform(
          validate_args=True
      )
      z = tf.zeros((3, 5, 0))
      self.assertAllEqual(bijector.forward(z), z)
      self.assertAllEqual(bijector.inverse(z), z)
  
      bijector = discrete_cosine_transform.DiscreteCosineTransform(
          dct_type=3, validate_args=True
      )
      z = tf.zeros((2, 0, 7))
      self.assertAllEqual(bijector.forward(z), z)
      self.assertAllEqual(bijector.inverse(z), z)
  
file_path: probability/tensorflow_probability/python/bijectors/discrete_cosine_transform_test.py
imports: import numpy
  from scipy import fftpack
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector_test_util
  from tensorflow_probability.python.bijectors import discrete_cosine_transform
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 4 for calling the DiscreteCosineTransformTest obj's underlying member method code with example usage: obj.testZeroSizedInput() without return types