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""" Tests for L{twisted.test.proto_helpers}. """ from zope.interface.verify import verifyObject from twisted.internet.interfaces import (ITransport, IPushProducer, IConsumer, IReactorTCP, IReactorSSL, IReactorUNIX, IAddress, IListeningPort, IConnector) from twisted.internet.address import IPv4Address from twisted.trial.unittest import TestCase from twisted.test.proto_helpers import (StringTransport, MemoryReactor, RaisingMemoryReactor, NonStreamingProducer) from twisted.internet.protocol import ClientFactory, Factory class StringTransportTests(TestCase): """ Tests for L{twisted.test.proto_helpers.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(object): """ 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)