docstr: Test for snake activation function execution.
docstr_tok: ["Test","for","snake","activation","function","execution","."]
code: def test_snake(self):
      """
      Test for snake activation function execution.
      """
      inputs = torch.rand(
          [self.batch_size, self.in_channels, self.max_len]
      )
      snake = CodecActivation("snake", channels=self.in_channels)
      out = snake(x=inputs)
      assert out.shape == (
          self.batch_size,
          self.in_channels,
          self.max_len,
      )
  
imports: import pytest
  import torch
  from nemo.collections.tts.modules.audio_codec_modules import CodecActivation, Conv1dNorm, ConvTranspose1dNorm, FiniteScalarQuantizer, GroupFiniteScalarQuantizer, get_down_sample_padding
  from nemo.collections.tts.modules.encodec_modules import GroupResidualVectorQuantizer, ResidualVectorQuantizer
label_desc: Use image node_id 2 for calling the TestCodecActivation obj's underlying member method code with example usage: obj.test_snake() without return types