new_contents: import cv2
  import numpy as np
  from plantcv.plantcv import acute_vertex
  
  
  def test_acute_vertex(test_data):
      # Read in test data
      img = cv2.imread(test_data.small_rgb_img)
      obj_contour = test_data.load_composed_contours(test_data.small_composed_contours_file)
      points, _ = acute_vertex(obj=obj_contour, win=5, thresh=15, sep=5, img=img)
      assert points == [[222, 139]]
  
  
  def test_acute_vertex_bad_obj(test_data):
      img = cv2.imread(test_data.small_rgb_img)
      obj_contour = np.array([])
      points = acute_vertex(obj=obj_contour, win=5, thresh=15, sep=5, img=img)
      assert points == ["NA", "NA"]
  
subject: Create acute_vertex tests module