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Viewing changes to vendor/Twisted-10.0.0/twisted/test/testutils.py

  • Committer: Jesse Andrews
  • Date: 2010-05-28 06:05:26 UTC
  • Revision ID: git-v1:bf6e6e718cdc7488e2da87b21e258ccc065fe499
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vendor/Twisted-10.0.0/twisted/test/testutils.py
 
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from cStringIO import StringIO
 
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from twisted.internet.protocol import FileWrapper
 
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class IOPump:
 
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    """Utility to pump data between clients and servers for protocol testing.
 
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    Perhaps this is a utility worthy of being in protocol.py?
 
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    """
 
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    def __init__(self, client, server, clientIO, serverIO):
 
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        self.client = client
 
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        self.server = server
 
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        self.clientIO = clientIO
 
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        self.serverIO = serverIO
 
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    def flush(self):
 
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        "Pump until there is no more input or output."
 
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        while self.pump():
 
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            pass
 
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    def pump(self):
 
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        """Move data back and forth.
 
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        Returns whether any data was moved.
 
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        """
 
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        self.clientIO.seek(0)
 
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        self.serverIO.seek(0)
 
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        cData = self.clientIO.read()
 
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        sData = self.serverIO.read()
 
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        self.clientIO.seek(0)
 
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        self.serverIO.seek(0)
 
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        self.clientIO.truncate()
 
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        self.serverIO.truncate()
 
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        for byte in cData:
 
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            self.server.dataReceived(byte)
 
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        for byte in sData:
 
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            self.client.dataReceived(byte)
 
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        if cData or sData:
 
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            return 1
 
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        else:
 
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            return 0
 
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def returnConnected(server, client):
 
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    """Take two Protocol instances and connect them.
 
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    """
 
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    cio = StringIO()
 
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    sio = StringIO()
 
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    client.makeConnection(FileWrapper(cio))
 
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    server.makeConnection(FileWrapper(sio))
 
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    pump = IOPump(client, server, cio, sio)
 
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    # Challenge-response authentication:
 
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    pump.flush()
 
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    # Uh...
 
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    pump.flush()
 
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    return pump