code: def test_blank_image(self):
      with mp_selfie_segmentation.SelfieSegmentation() as selfie_segmentation:
          image = np.zeros([100, 100, 3], dtype=np.uint8)
          image.fill(255)
          results = selfie_segmentation.process(image)
          normalized_segmentation_mask = (
              results.segmentation_mask * 255
          ).astype(int)
          self.assertLess(np.amax(normalized_segmentation_mask), 1)
  
file_path: mediapipe/mediapipe/python/solutions/selfie_segmentation_test.py
imports: import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import cv2
  import numpy
  from mediapipe.python.solutions import selfie_segmentation
label_desc: Use image node_id 3 for calling the SelfieSegmentationTest obj's underlying member method code with example usage: obj.test_blank_image() without return types