text: #!/usr/bin/python env
  
  import util
  import base64
  
  def test_sign():
      key = base64.b64encode('abc')
      string_to_sign = '/account/GET200601021504'
  
      signature = util.sign(string_to_sign, key)
      assert util.verify(
          string_to_sign, key, signature) is True
  