test_recvline.py 文件源码

def setUp(self):
        # A memory-only terminal emulator, into which the server will
        # write things and make other state changes.  What ends up
        # here is basically what a user would have seen on their
        # screen.
        testTerminal = NotifyingExpectableBuffer()

        # An insults client protocol which will translate bytes
        # received from the child process into keystroke commands for
        # an ITerminalProtocol.
        insultsClient = insults.ClientProtocol(lambda: testTerminal)

        # A process protocol which will translate stdout and stderr
        # received from the child process to dataReceived calls and
        # error reporting on an insults client protocol.
        processClient = stdio.TerminalProcessProtocol(insultsClient)

        # Run twisted/conch/stdio.py with the name of a class
        # implementing ITerminalProtocol.  This class will be used to
        # handle bytes we send to the child process.
        exe = sys.executable
        module = stdio.__file__
        args = ["python2.3", module, reflect.qual(self.serverProtocol)]
        env = {"PYTHONPATH": os.pathsep.join(sys.path)}

        from twisted.internet import reactor
        clientTransport = reactor.spawnProcess(processClient, exe, args,
                                               env=env, usePTY=True)

        self.recvlineClient = self.testTerminal = testTerminal
        self.processClient = processClient
        self.clientTransport = clientTransport

        # Wait for the process protocol and test terminal to become
        # connected before proceeding.  The former should always
        # happen first, but it doesn't hurt to be safe.
        return defer.gatherResults(filter(None, [
            processClient.onConnection,
            testTerminal.expect(">>> ")]))