code: def test_all_zero_input_works(self, last_iter_clip):
      # Tests that encoding does not blow up with all-zero input.
      stage = kashin.KashinHadamardEncodingStage(
          num_iters=3, eta=0.9, delta=1.0, last_iter_clip=last_iter_clip
      )
      test_data = self.run_one_to_many_encode_decode(
          stage, lambda: tf.zeros([3, 12])
      )
      self.common_asserts_for_test_data(test_data)
      self.assertAllEqual(
          np.zeros((3, 12)).astype(np.float32), test_data.decoded_x
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import itertools
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_model_optimization.python.core.internal.tensor_encoding.stages.research import kashin
  from tensorflow_model_optimization.python.core.internal.tensor_encoding.testing import test_utils
label_desc: Use image node_id 8 for calling the KashinHadamardEncodingStageTest obj's underlying member method code with example usage: obj.test_all_zero_input_works(last_iter_clip) without return types