code: def test_simple_case(self):
      layer = rms_norm.RMSNorm([1, 2], eps=0.0)
      inputs = np.full(shape=[2, 3, 3, 5], fill_value=2.0)
      outputs = layer(inputs)
      for x in np.nditer(outputs):
          self.assertEqual(x, 1.0)
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import initializers
  from haiku._src import rms_norm
  from haiku._src import test_utils
  from haiku._src import transform
  import jax
  import jax.numpy
  import numpy
label_desc: Use image node_id 3 for calling the RMSNormTest obj's underlying member method code with example usage: obj.test_simple_case() without return types