code: def test_activation(dtype):
      x = dtype(np.random.rand(2, 5))
      a = dtype(np.random.randn())
      expected_result = x + np.power(np.sin(a * x), 2) / a
      test_utils.assert_allclose_according_to_type(
          snake(x, a), expected_result
      )
  
imports: import pytest
  import numpy
  from tensorflow_addons.activations 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_activation(dtype) without return types