57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
# Copyright (c) Twisted Matrix Laboratories.
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# See LICENSE for details.
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from io import BytesIO
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from twisted.internet import abstract, defer, protocol
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from twisted.protocols import basic, loopback
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from twisted.trial import unittest
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class BufferingServer(protocol.Protocol):
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buffer = b""
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def dataReceived(self, data: bytes) -> None:
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self.buffer += data
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class FileSendingClient(protocol.Protocol):
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def __init__(self, f: BytesIO) -> None:
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self.f = f
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def connectionMade(self) -> None:
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assert self.transport is not None
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s = basic.FileSender()
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d = s.beginFileTransfer(self.f, self.transport, lambda x: x)
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d.addCallback(lambda r: self.transport.loseConnection())
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class FileSenderTests(unittest.TestCase):
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def testSendingFile(self) -> defer.Deferred[None]:
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testStr = b"xyz" * 100 + b"abc" * 100 + b"123" * 100
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s = BufferingServer()
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c = FileSendingClient(BytesIO(testStr))
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d: defer.Deferred[None] = loopback.loopbackTCP(s, c)
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def callback(x: object) -> None:
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self.assertEqual(s.buffer, testStr)
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return d.addCallback(callback)
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def testSendingEmptyFile(self) -> None:
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fileSender = basic.FileSender()
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consumer = abstract.FileDescriptor()
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consumer.connected = 1
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emptyFile = BytesIO(b"")
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d = fileSender.beginFileTransfer(emptyFile, consumer, lambda x: x)
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# The producer will be immediately exhausted, and so immediately
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# unregistered
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self.assertIsNone(consumer.producer)
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# Which means the Deferred from FileSender should have been called
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self.assertTrue(d.called, "producer unregistered with deferred being called")
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