code: def test_layer(dtype):
      x = np.random.rand(2, 5).astype(dtype)
      a = np.random.randn()
      val = snake(x, a)
      test_utils.layer_test(
          Snake,
          kwargs={
              "frequency_initializer": tf.constant_initializer(a),
              "dtype": dtype,
          },
          input_data=x,
          expected_output=val,
      )
  
imports: import pytest
  import numpy
  import tensorflow
  from tensorflow_addons.layers.snake import Snake
  from tensorflow_addons.activations.snake import snake
  from tensorflow_addons.utils import test_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_layer(dtype) without return types