code: def test_invalid_power_iterations(self):
      with self.assertRaisesRegex(
          ValueError, "`power_iterations` should be greater than zero."
      ):
          layers.SpectralNormalization(
              layers.Dense(2), power_iterations=0
          )
  
file_path: keras/keras/layers/normalization/spectral_normalization_test.py
imports: import numpy
  import pytest
  from keras import backend
  from keras import initializers
  from keras import layers
  from keras import testing
label_desc: Use image node_id 2 for calling the SpectralNormalizationTest obj's underlying member method code with example usage: obj.test_invalid_power_iterations() without return types