new_contents: import cv2
  from plantcv.plantcv.morphology import segment_sort
  
  
  def test_segment_sort(morphology_test_data):
      skeleton = cv2.imread(morphology_test_data.skel_img, -1)
      leaf_obj, _ = segment_sort(skel_img=skeleton,
                                 objects=morphology_test_data.load_segments(morphology_test_data.segments_file, "edges"),
                                 mask=skeleton)
      assert len(leaf_obj) == 4
  
  
  def test_segment_sort_no_mask(morphology_test_data):
      skeleton = cv2.imread(morphology_test_data.skel_img, -1)
      leaf_obj, _ = segment_sort(skel_img=skeleton,
                                 objects=morphology_test_data.load_segments(morphology_test_data.segments_file, "edges"))
      assert len(leaf_obj) == 4
  
subject: Add segment_sort tests module