code: def test_background_one_region_center(self):
      x = np.array([[0, 0, 0], [0, 1, 0], [0, 0, 0]])
  
      assert_array_equal(
          label(x, connectivity=1, background=0),
          [[0, 0, 0], [0, 1, 0], [0, 0, 0]],
      )
  
imports: import numpy
  from skimage.measure import label
  import skimage.measure._ccomp
  from skimage._shared import testing
  from skimage._shared.testing import assert_array_equal
label_desc: Use image node_id 8 for calling the TestConnectedComponents obj's underlying member method code with example usage: obj.test_background_one_region_center() without return types