code: def test_contour(self):
      input_param = {"keys": "img", "kernel_type": "Laplace"}
  
      for p in TEST_NDARRAYS:
          # check 5-dim input data
          test_cube, expected_output = gen_fixed_cube(p)
          for cube in test_cube:
              test_result_cube = LabelToContourd(**input_param)(
                  {"img": cube}
              )
              self.assertEqual(
                  test_result_cube["img"].shape, cube.shape
              )
  
              test_result_np = test_result_cube["img"]
              channels = cube.shape[0]
              for channel in range(channels):
                  assert_allclose(
                      test_result_np[channel, ...],
                      expected_output,
                      type_test="tensor",
                  )
  
          # check 4-dim input data
          test_img, expected_output = gen_fixed_img(p)
          for img in test_img:
              channels = img.shape[0]
              test_result_img = LabelToContourd(**input_param)(
                  {"img": img}
              )
              self.assertEqual(test_result_img["img"].shape, img.shape)
  
              test_result_np = test_result_img["img"]
              for channel in range(channels):
                  assert_allclose(
                      test_result_np[channel, ...],
                      expected_output,
                      type_test="tensor",
                  )
  
      # check invalid input data
      error_input = {"img": torch.rand(1, 2)}
      self.assertRaises(
          ValueError, LabelToContourd(**input_param), error_input
      )
      error_input = {"img": np.random.rand(1, 2)}
      self.assertRaises(
          ValueError, LabelToContourd(**input_param), error_input
      )
      error_input = {"img": torch.rand(1, 2, 3, 4, 5)}
      self.assertRaises(
          ValueError, LabelToContourd(**input_param), error_input
      )
  
file_path: MONAI/tests/test_label_to_contourd.py
imports: from __future__ import annotations
  import unittest
  import numpy
  import torch
  from monai.transforms import LabelToContourd
  from tests.utils import TEST_NDARRAYS, assert_allclose
label_desc: Use image node_id 1 for calling the TestContourd obj's underlying member method code with example usage: obj.test_contour() without return types