new_contents: #!/usr/bin/env python
  """
  Tests for python-bna
  
  >>> import bna
  >>> serial = "US120910711868"
  >>> secret = b"88aaface48291e09dc1ece9c2aa44d839983a7ff"
  >>> bna.getToken(secret, time=1347279358)
  (93461643, 2)
  >>> bna.getToken(secret, time=1347279359)
  (93461643, 1)
  >>> bna.getToken(secret, time=1347279360)
  (86031001, 30)
  >>> bna.getRestoreCode(serial, secret)
  '4B91NQCYQ3'
  >>> bna.normalizeSerial(bna.prettifySerial(serial)) == serial
  True
  """
  
  if __name__ == "__main__":
  	import doctest
  	doctest.testmod()
  
subject: Add some basic tests