text: # -*- coding: utf-8 -*-
  from iscc_service import tools
  
  
  def test_add_placeholders():
      c = ["CCD277vDVpwNR", "CAd3AuPU1brqV"]
      r = tools.add_placeholders(c)
      assert r == ["CCD277vDVpwNR", "CAd3AuPU1brqV", "CDCCCCCCCCCCC", "CRCCCCCCCCCCC"]
  