code: def test_vector(self):
      sn = spectral_norm.SpectralNorm()
      with self.assertRaisesRegex(ValueError, "not well defined"):
          sn(jnp.ones(shape=[5]))
  
file_path: dm-haiku/haiku/_src/spectral_norm_test.py
imports: from absl.testing import absltest
  from haiku._src import basic
  from haiku._src import spectral_norm
  from haiku._src import test_utils
  from haiku._src import transform
  import jax.numpy
  import jax.random
  import numpy
label_desc: Use image node_id 2 for calling the SpectralNormTest obj's underlying member method code with example usage: obj.test_vector() without return types