new_contents: from framework import *
  
  # This test reproduces `TypeError: 'NoneType' object is not iterable` raised on
  # empty canvas conversion attempt.
  
  canvasvg.saveall(__file__ + '.svg', canv)
  
  os.system("inkview %s.svg" % __file__)
  
subject: add test that attempts to convert all items on an empty canvas