new_contents: import zlib
  import sys
  
  buf = open(sys.argv[0]).read() * 8
  
  x = zlib.compress(buf)
  y = zlib.decompress(x)
  if buf != y:
      print "normal compression/decompression failed"
  
  buf = buf * 16
  
  co = zlib.compressobj(8, 8, -15)
  x1 = co.compress(buf)
  x2 = co.flush()
  x = x1 + x2
  
  dc = zlib.decompressobj(-15)
  y1 = dc.decompress(x)
  y2 = dc.flush()
  y = y1 + y2
  if buf != y:
      print "compress/decompression obj failed"
  
  def ignore():
      """An empty function with a big string.
  
      Make the compression algorithm work a little harder.
      """
  
      """
  LAERTES 
  
         O, fear me not.
         I stay too long: but here my father comes.
  
         Enter POLONIUS
  
         A double blessing is a double grace,
         Occasion smiles upon a second leave.
  
  LORD POLONIUS 
  
         Yet here, Laertes! aboard, aboard, for shame!
         The wind sits in the shoulder of your sail,
         And you are stay'd for. There; my blessing with thee!
         And these few precepts in thy memory
         See thou character. Give thy thoughts no tongue,
         Nor any unproportioned thought his act.
         Be thou familiar, but by no means vulgar.
         Those friends thou hast, and their adoption tried,
         Grapple them to thy soul with hoops of steel;
         But do not dull thy palm with entertainment
         Of each new-hatch'd, unfledged comrade. Beware
         Of entrance to a quarrel, but being in,
         Bear't that the opposed may beware of thee.
         Give every man thy ear, but few thy voice;
         Take each man's censure, but reserve thy judgment.
         Costly thy habit as thy purse can buy,
         But not express'd in fancy; rich, not gaudy;
         For the apparel oft proclaims the man,
         And they in France of the best rank and station
         Are of a most select and generous chief in that.
         Neither a borrower nor a lender be;
         For loan oft loses both itself and friend,
         And borrowing dulls the edge of husbandry.
         This above all: to thine ownself be true,
         And it must follow, as the night the day,
         Thou canst not then be false to any man.
         Farewell: my blessing season this in thee!
  
  LAERTES 
  
         Most humbly do I take my leave, my lord.
  
  LORD POLONIUS 
  
         The time invites you; go; your servants tend.
  
  LAERTES 
  
         Farewell, Ophelia; and remember well
         What I have said to you.
  
  OPHELIA 
  
         'Tis in my memory lock'd,
         And you yourself shall keep the key of it.
  
  LAERTES 
  
         Farewell.
  """
  
  
subject: test the zlib module only produce output if somethign goes wrong