new_contents: import cv2
  from plantcv.plantcv import outputs
  from plantcv.plantcv.morphology import analyze_stem
  
  
  def test_analyze_stem(morphology_test_data):
      # Clear previous outputs
      outputs.clear()
      skel = cv2.imread(morphology_test_data.skel_img)
      stem_obj = morphology_test_data.load_segments(morphology_test_data.segments_file, "stem")
      _ = analyze_stem(rgb_img=skel, stem_objects=stem_obj)
      assert int(outputs.observations['default']['stem_angle']['value']) == 8
  
  
  def test_analyze_stem_bad_angle(morphology_test_data):
      skel = cv2.imread(morphology_test_data.skel_img)
      stem_obj = [[[[1116, 1728]], [[1116, 1]]]]
      _ = analyze_stem(rgb_img=skel, stem_objects=stem_obj)
      assert outputs.observations['default']['stem_angle']['value'] == 22877334.0
  
subject: Add analyze_stem tests module