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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.internet.testing}.
"""
from zope.interface.verify import verifyObject
from twisted.internet.address import IPv4Address
from twisted.internet.interfaces import (
IAddress,
IConnector,
IConsumer,
IListeningPort,
IPushProducer,
IReactorSSL,
IReactorTCP,
IReactorUNIX,
ITransport,
)
from twisted.internet.protocol import ClientFactory, Factory
from twisted.internet.testing import (
MemoryReactor,
NonStreamingProducer,
RaisingMemoryReactor,
StringTransport,
)
from twisted.python.reflect import namedAny
from twisted.trial.unittest import TestCase
class StringTransportTests(TestCase):
"""
Tests for L{twisted.internet.testing.StringTransport}.
"""
def setUp(self):
self.transport = StringTransport()
def test_interfaces(self):
"""
L{StringTransport} instances provide L{ITransport}, L{IPushProducer},
and L{IConsumer}.
"""
self.assertTrue(verifyObject(ITransport, self.transport))
self.assertTrue(verifyObject(IPushProducer, self.transport))
self.assertTrue(verifyObject(IConsumer, self.transport))
def test_registerProducer(self):
"""
L{StringTransport.registerProducer} records the arguments supplied to
it as instance attributes.
"""
producer = object()
streaming = object()
self.transport.registerProducer(producer, streaming)
self.assertIs(self.transport.producer, producer)
self.assertIs(self.transport.streaming, streaming)
def test_disallowedRegisterProducer(self):
"""
L{StringTransport.registerProducer} raises L{RuntimeError} if a
producer is already registered.
"""
producer = object()
self.transport.registerProducer(producer, True)
self.assertRaises(
RuntimeError, self.transport.registerProducer, object(), False
)
self.assertIs(self.transport.producer, producer)
self.assertTrue(self.transport.streaming)
def test_unregisterProducer(self):
"""
L{StringTransport.unregisterProducer} causes the transport to forget
about the registered producer and makes it possible to register a new
one.
"""
oldProducer = object()
newProducer = object()
self.transport.registerProducer(oldProducer, False)
self.transport.unregisterProducer()
self.assertIsNone(self.transport.producer)
self.transport.registerProducer(newProducer, True)
self.assertIs(self.transport.producer, newProducer)
self.assertTrue(self.transport.streaming)
def test_invalidUnregisterProducer(self):
"""
L{StringTransport.unregisterProducer} raises L{RuntimeError} if called
when no producer is registered.
"""
self.assertRaises(RuntimeError, self.transport.unregisterProducer)
def test_initialProducerState(self):
"""
L{StringTransport.producerState} is initially C{'producing'}.
"""
self.assertEqual(self.transport.producerState, "producing")
def test_pauseProducing(self):
"""
L{StringTransport.pauseProducing} changes the C{producerState} of the
transport to C{'paused'}.
"""
self.transport.pauseProducing()
self.assertEqual(self.transport.producerState, "paused")
def test_resumeProducing(self):
"""
L{StringTransport.resumeProducing} changes the C{producerState} of the
transport to C{'producing'}.
"""
self.transport.pauseProducing()
self.transport.resumeProducing()
self.assertEqual(self.transport.producerState, "producing")
def test_stopProducing(self):
"""
L{StringTransport.stopProducing} changes the C{'producerState'} of the
transport to C{'stopped'}.
"""
self.transport.stopProducing()
self.assertEqual(self.transport.producerState, "stopped")
def test_stoppedTransportCannotPause(self):
"""
L{StringTransport.pauseProducing} raises L{RuntimeError} if the
transport has been stopped.
"""
self.transport.stopProducing()
self.assertRaises(RuntimeError, self.transport.pauseProducing)
def test_stoppedTransportCannotResume(self):
"""
L{StringTransport.resumeProducing} raises L{RuntimeError} if the
transport has been stopped.
"""
self.transport.stopProducing()
self.assertRaises(RuntimeError, self.transport.resumeProducing)
def test_disconnectingTransportCannotPause(self):
"""
L{StringTransport.pauseProducing} raises L{RuntimeError} if the
transport is being disconnected.
"""
self.transport.loseConnection()
self.assertRaises(RuntimeError, self.transport.pauseProducing)
def test_disconnectingTransportCannotResume(self):
"""
L{StringTransport.resumeProducing} raises L{RuntimeError} if the
transport is being disconnected.
"""
self.transport.loseConnection()
self.assertRaises(RuntimeError, self.transport.resumeProducing)
def test_loseConnectionSetsDisconnecting(self):
"""
L{StringTransport.loseConnection} toggles the C{disconnecting} instance
variable to C{True}.
"""
self.assertFalse(self.transport.disconnecting)
self.transport.loseConnection()
self.assertTrue(self.transport.disconnecting)
def test_specifiedHostAddress(self):
"""
If a host address is passed to L{StringTransport.__init__}, that
value is returned from L{StringTransport.getHost}.
"""
address = object()
self.assertIs(StringTransport(address).getHost(), address)
def test_specifiedPeerAddress(self):
"""
If a peer address is passed to L{StringTransport.__init__}, that
value is returned from L{StringTransport.getPeer}.
"""
address = object()
self.assertIs(StringTransport(peerAddress=address).getPeer(), address)
def test_defaultHostAddress(self):
"""
If no host address is passed to L{StringTransport.__init__}, an
L{IPv4Address} is returned from L{StringTransport.getHost}.
"""
address = StringTransport().getHost()
self.assertIsInstance(address, IPv4Address)
def test_defaultPeerAddress(self):
"""
If no peer address is passed to L{StringTransport.__init__}, an
L{IPv4Address} is returned from L{StringTransport.getPeer}.
"""
address = StringTransport().getPeer()
self.assertIsInstance(address, IPv4Address)
class ReactorTests(TestCase):
"""
Tests for L{MemoryReactor} and L{RaisingMemoryReactor}.
"""
def test_memoryReactorProvides(self):
"""
L{MemoryReactor} provides all of the attributes described by the
interfaces it advertises.
"""
memoryReactor = MemoryReactor()
verifyObject(IReactorTCP, memoryReactor)
verifyObject(IReactorSSL, memoryReactor)
verifyObject(IReactorUNIX, memoryReactor)
def test_raisingReactorProvides(self):
"""
L{RaisingMemoryReactor} provides all of the attributes described by the
interfaces it advertises.
"""
raisingReactor = RaisingMemoryReactor()
verifyObject(IReactorTCP, raisingReactor)
verifyObject(IReactorSSL, raisingReactor)
verifyObject(IReactorUNIX, raisingReactor)
def test_connectDestination(self):
"""
L{MemoryReactor.connectTCP}, L{MemoryReactor.connectSSL}, and
L{MemoryReactor.connectUNIX} will return an L{IConnector} whose
C{getDestination} method returns an L{IAddress} with attributes which
reflect the values passed.
"""
memoryReactor = MemoryReactor()
for connector in [
memoryReactor.connectTCP("test.example.com", 8321, ClientFactory()),
memoryReactor.connectSSL("test.example.com", 8321, ClientFactory(), None),
]:
verifyObject(IConnector, connector)
address = connector.getDestination()
verifyObject(IAddress, address)
self.assertEqual(address.host, "test.example.com")
self.assertEqual(address.port, 8321)
connector = memoryReactor.connectUNIX(b"/fake/path", ClientFactory())
verifyObject(IConnector, connector)
address = connector.getDestination()
verifyObject(IAddress, address)
self.assertEqual(address.name, b"/fake/path")
def test_listenDefaultHost(self):
"""
L{MemoryReactor.listenTCP}, L{MemoryReactor.listenSSL} and
L{MemoryReactor.listenUNIX} will return an L{IListeningPort} whose
C{getHost} method returns an L{IAddress}; C{listenTCP} and C{listenSSL}
will have a default host of C{'0.0.0.0'}, and a port that reflects the
value passed, and C{listenUNIX} will have a name that reflects the path
passed.
"""
memoryReactor = MemoryReactor()
for port in [
memoryReactor.listenTCP(8242, Factory()),
memoryReactor.listenSSL(8242, Factory(), None),
]:
verifyObject(IListeningPort, port)
address = port.getHost()
verifyObject(IAddress, address)
self.assertEqual(address.host, "0.0.0.0")
self.assertEqual(address.port, 8242)
port = memoryReactor.listenUNIX(b"/path/to/socket", Factory())
verifyObject(IListeningPort, port)
address = port.getHost()
verifyObject(IAddress, address)
self.assertEqual(address.name, b"/path/to/socket")
def test_readers(self):
"""
Adding, removing, and listing readers works.
"""
reader = object()
reactor = MemoryReactor()
reactor.addReader(reader)
reactor.addReader(reader)
self.assertEqual(reactor.getReaders(), [reader])
reactor.removeReader(reader)
self.assertEqual(reactor.getReaders(), [])
def test_writers(self):
"""
Adding, removing, and listing writers works.
"""
writer = object()
reactor = MemoryReactor()
reactor.addWriter(writer)
reactor.addWriter(writer)
self.assertEqual(reactor.getWriters(), [writer])
reactor.removeWriter(writer)
self.assertEqual(reactor.getWriters(), [])
class TestConsumer:
"""
A very basic test consumer for use with the NonStreamingProducerTests.
"""
def __init__(self):
self.writes = []
self.producer = None
self.producerStreaming = None
def registerProducer(self, producer, streaming):
"""
Registers a single producer with this consumer. Just keeps track of it.
@param producer: The producer to register.
@param streaming: Whether the producer is a streaming one or not.
"""
self.producer = producer
self.producerStreaming = streaming
def unregisterProducer(self):
"""
Forget the producer we had previously registered.
"""
self.producer = None
self.producerStreaming = None
def write(self, data):
"""
Some data was written to the consumer: stores it for later use.
@param data: The data to write.
"""
self.writes.append(data)
class NonStreamingProducerTests(TestCase):
"""
Tests for the L{NonStreamingProducer} to validate behaviour.
"""
def test_producesOnly10Times(self):
"""
When the L{NonStreamingProducer} has resumeProducing called 10 times,
it writes the counter each time and then fails.
"""
consumer = TestConsumer()
producer = NonStreamingProducer(consumer)
consumer.registerProducer(producer, False)
self.assertIs(consumer.producer, producer)
self.assertIs(producer.consumer, consumer)
self.assertFalse(consumer.producerStreaming)
for _ in range(10):
producer.resumeProducing()
# We should have unregistered the producer and printed the 10 results.
expectedWrites = [b"0", b"1", b"2", b"3", b"4", b"5", b"6", b"7", b"8", b"9"]
self.assertIsNone(consumer.producer)
self.assertIsNone(consumer.producerStreaming)
self.assertIsNone(producer.consumer)
self.assertEqual(consumer.writes, expectedWrites)
# Another attempt to produce fails.
self.assertRaises(RuntimeError, producer.resumeProducing)
def test_cannotPauseProduction(self):
"""
When the L{NonStreamingProducer} is paused, it raises a
L{RuntimeError}.
"""
consumer = TestConsumer()
producer = NonStreamingProducer(consumer)
consumer.registerProducer(producer, False)
# Produce once, just to be safe.
producer.resumeProducing()
self.assertRaises(RuntimeError, producer.pauseProducing)
class DeprecationTests(TestCase):
"""
Deprecations in L{twisted.test.proto_helpers}.
"""
def helper(self, test, obj):
new_path = f"twisted.internet.testing.{obj.__name__}"
warnings = self.flushWarnings([test])
self.assertEqual(DeprecationWarning, warnings[0]["category"])
self.assertEqual(1, len(warnings))
self.assertIn(new_path, warnings[0]["message"])
self.assertIs(obj, namedAny(new_path))
def test_accumulatingProtocol(self):
from twisted.test.proto_helpers import AccumulatingProtocol
self.helper(self.test_accumulatingProtocol, AccumulatingProtocol)
def test_lineSendingProtocol(self):
from twisted.test.proto_helpers import LineSendingProtocol
self.helper(self.test_lineSendingProtocol, LineSendingProtocol)
def test_fakeDatagramTransport(self):
from twisted.test.proto_helpers import FakeDatagramTransport
self.helper(self.test_fakeDatagramTransport, FakeDatagramTransport)
def test_stringTransport(self):
from twisted.test.proto_helpers import StringTransport
self.helper(self.test_stringTransport, StringTransport)
def test_stringTransportWithDisconnection(self):
from twisted.test.proto_helpers import StringTransportWithDisconnection
self.helper(
self.test_stringTransportWithDisconnection, StringTransportWithDisconnection
)
def test_stringIOWithoutClosing(self):
from twisted.test.proto_helpers import StringIOWithoutClosing
self.helper(self.test_stringIOWithoutClosing, StringIOWithoutClosing)
def test__fakeConnector(self):
from twisted.test.proto_helpers import _FakeConnector
self.helper(self.test__fakeConnector, _FakeConnector)
def test__fakePort(self):
from twisted.test.proto_helpers import _FakePort
self.helper(self.test__fakePort, _FakePort)
def test_memoryReactor(self):
from twisted.test.proto_helpers import MemoryReactor
self.helper(self.test_memoryReactor, MemoryReactor)
def test_memoryReactorClock(self):
from twisted.test.proto_helpers import MemoryReactorClock
self.helper(self.test_memoryReactorClock, MemoryReactorClock)
def test_raisingMemoryReactor(self):
from twisted.test.proto_helpers import RaisingMemoryReactor
self.helper(self.test_raisingMemoryReactor, RaisingMemoryReactor)
def test_nonStreamingProducer(self):
from twisted.test.proto_helpers import NonStreamingProducer
self.helper(self.test_nonStreamingProducer, NonStreamingProducer)
def test_waitUntilAllDisconnected(self):
from twisted.test.proto_helpers import waitUntilAllDisconnected
self.helper(self.test_waitUntilAllDisconnected, waitUntilAllDisconnected)
def test_eventLoggingObserver(self):
from twisted.test.proto_helpers import EventLoggingObserver
self.helper(self.test_eventLoggingObserver, EventLoggingObserver)
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