code: def test_sobel_gradients(self, image, arguments, expected_grad):
      sobel = SobelGradients(**arguments)
      grad = sobel(image)
      assert_allclose(grad, expected_grad)
  
file_path: MONAI/tests/test_sobel_gradient.py
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.transforms import SobelGradients
  from tests.utils import assert_allclose
label_desc: Use image node_id 1 for calling the SobelGradientTests obj's underlying member method code with example usage: obj.test_sobel_gradients(image, arguments, expected_grad) without return types