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# Copyright (c) Twisted Matrix Laboratories. # See LICENSE for details. """ Tests for L{twisted.internet.serialport}. """ from twisted.trial import unittest from twisted.python.failure import Failure from twisted.internet.protocol import Protocol from twisted.internet.error import ConnectionDone try: from twisted.internet import serialport except ImportError: serialport = None class DoNothing(object): """ Object with methods that do nothing. """ def __init__(self, *args, **kwargs): pass def __getattr__(self, attr): return lambda *args, **kwargs: None class SerialPortTests(unittest.TestCase): """ Minimal testing for Twisted's serial port support. See ticket #2462 for the eventual full test suite. """ if serialport is None: skip = "Serial port support is not available." def test_connectionMadeLost(self): """ C{connectionMade} and C{connectionLost} are called on the protocol by the C{SerialPort}. """ # Serial port that doesn't actually connect to anything: class DummySerialPort(serialport.SerialPort): _serialFactory = DoNothing def _finishPortSetup(self): pass # override default win32 actions events = [] class SerialProtocol(Protocol): def connectionMade(self): events.append("connectionMade") def connectionLost(self, reason): events.append(("connectionLost", reason)) # Creation of port should result in connectionMade call: port = DummySerialPort(SerialProtocol(), "", reactor=DoNothing()) self.assertEqual(events, ["connectionMade"]) # Simulate reactor calling connectionLost on the SerialPort: f = Failure(ConnectionDone()) port.connectionLost(f) self.assertEqual(events, ["connectionMade", ("connectionLost", f)])